Patent Publication Number: US-11047110-B2

Title: Hydraulic sub-assembly for a power machine

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to U.S. Provisional Patent Application No. 62/809,282, filed Feb. 22, 2019, the entirety of which is incorporated herein by reference. 
    
    
     BACKGROUND 
     This disclosure is directed toward power machines. More particularly, this disclosure relates to hydraulic sub-assemblies for power machines. Power machines, for the purposes of this disclosure, include any type of machine that generates power to accomplish a task or a variety of tasks. One type of power machine is a work vehicle. Work vehicles, such as loaders, are generally self-propelled vehicles that have a work device, such as a lift arm (although some work vehicles can have other work devices) that can be manipulated to perform a work function. Work vehicles include loaders, excavators, utility vehicles, tractors, and trenchers, to name a few examples. 
     Conventional power machines can include hydraulic circuits and associated equipment, such as a work actuator circuit and a pump that is configured to provide pressurized hydraulic fluid to the work actuator circuit. In some cases, a work actuator circuit is in communication with a work actuator that can include lift cylinders, tilt cylinders, telescoping cylinders, and the like for execution of certain work functions. The work actuator circuit can include valves and other devices to selectively provide pressurized hydraulic fluid to the various work actuators, and the valves and other devices can be mounted, for example, at various locations along the power machine. This configuration can also require fluid conduits for the work actuator circuit, which can direct fluid between the various valves and other components and can be arranged at various locations and orientations about the power machine. 
     The discussion above is merely provided for general background information and is not intended to be used as an aid in determining the scope of the claimed subject matter. 
     SUMMARY 
     Some embodiments of the present disclosure provide an improved arrangement of a hydraulic sub-assembly that can be secured to and used with a power machine. Some arrangements of a hydraulic sub-assembly according to the present disclosure can provide a support panel upon which various components of the work actuator circuit can be directly or indirectly mounted. Accordingly, among other benefits, some embodiments of the present disclosure provide a sub-assembly that can reduce the amount of material and manufacturing time that may be needed for assembly of the power machine. 
     In some embodiments, a hydraulic sub-assembly for use with a power machine with a cab can include a support panel. A control valve can be secured to the support panel to be supported by the support panel. The control valve being configured to provide hydraulic control of work functions on the power machine. The support panel can be configured to be secured to the power machine to define a structural portion of the cab. 
     In some embodiments, a power machine can include a cab having a lateral side, and an operator station. A hydraulic sub-assembly can include a single-piece support panel and a plurality of components that are secured to the unitary support panel to be supported by the unitary support panel relative to the frame. The phrase single-piece refers, in the context of this discussion to a support panel made from a unitary piece of material as opposed to two or more panels that are fastened together. The plurality of components can include: a control valve; an operator input device configured for hydraulic control of work functions, the operator input device being mounted on and in hydraulic communication with the control valve; hydraulic conduits including one or more tube lines and one or more flexible hoses; a cooler bracket; a hydraulic cooler secured to the cooler bracket to be spaced laterally apart from the single-piece support panel to provide clearance between the hydraulic cooler and the single-piece support panel for one or more of the hydraulic conduits; and a hydraulic filter secured on an opposite side of the single-piece support panel from at least one of the control valve, the operator input device, the pilot valve, the cooler bracket, or the hydraulic cooler. The single-piece support panel can be configured to be secured to the lateral side of the cab to define a structural portion of the cab, with one or more of the control valve, the operator input device, the pilot valve, the cooler bracket, and the hydraulic cooler positioned opposite the single-piece support panel from the operator station. 
     In some embodiments, a method of manufacture is provided for a power machine with a cab. The method of manufacture can include assembling a hydraulic sub-assembly, including: providing a single-piece support panel; and securing a control valve to the single-piece support panel. The method can further include securing the hydraulic sub-assembly to the power machine to define a structural portion of the cab. 
     In some embodiments, a method of manufacture is provided for a power machine with a cab having a lateral side, and an operator station. The method of manufacture can include assembling a hydraulic sub-assembly by providing a single-piece support panel and securing a plurality of components to the single-piece support panel. The plurality of components include: a control valve; an operator input device that is configured for hydraulic control of work functions via hydraulic communication with the control valve; a pilot valve in hydraulic communication with the control valve for hydraulic control of the work functions; hydraulic conduits including one or more tube lines and one or more flexible hoses; a cooler bracket; a hydraulic cooler secured to the cooler bracket to provide clearance between the hydraulic cooler and the single-piece support panel for one or more of the hydraulic conduits; and a hydraulic filter secured on an opposite side of the single-piece support panel from at least one of the control valve, the operator input device, the pilot valve, the cooler bracket, or the hydraulic cooler. The hydraulic sub-assembly can be secured to the power machine to define a structural portion of the lateral side of the cab, with one or more of the control valve, the operator input device, the pilot valve, the cooler bracket, and the hydraulic cooler positioned opposite the single-piece support panel from operator station, and with the hydraulic filter positioned at least partly beneath the operator station. 
     In some embodiments, a hydraulic sub-assembly is provided for use with a power machine with a cab that includes an operator station. The hydraulic sub-assembly can include a support panel configured to be secured to a lateral side of the cab, and a plurality of components secured to and supported by the support panel. The plurality of components can include: a control valve; an operator input device configured for control of hydraulic work functions of the power machine, the operator input device being mounted on and in hydraulic communication with the control valve; a pilot valve configured to facilitate interoperation of the control valve and the operator input device; hydraulic conduits including one or more tube lines and one or more flexible hoses; a hydraulic cooler; and a hydraulic filter. The support panel can be configured to define a structural side wall of the cab, with one or more of the control valve, the operator input device, the pilot valve, or the hydraulic cooler positioned opposite the support panel from the operator station. 
     In some embodiments, an articulated loader is provided, including a cab that defines an operator station and is supported on a front frame member of an articulated frame. A hydraulic sub-assembly of the articulated loader can include a support panel and a control valve. The support panel can form at least part of a structural side wall of the cab, laterally adjacent to the operator station. The control valve can be secured to the support panel to be supported by the support panel relative to the cab. The control valve can be configured to provide hydraulic control of work functions of the articulated loader based on inputs from an operator within the operator station. 
     Some embodiments provide a method of manufacturing a power machine. The method can include assembling a hydraulic sub-assembly, including: providing a support panel, and securing a control valve and a plurality of hydraulic components to the support panel. The method can also include securing the hydraulic sub-assembly, including the control valve and the hydraulic components, to a frame of the power machine, to support the control valve and the plurality of hydraulic components relative to the frame, with the support panel defining a structural portion of a lateral side of a cab of the power machine. 
     This Summary and the Abstract are provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary and the Abstract are not intended to identify key features or essential features of the claimed subject matter, nor are they intended to be used as an aid in determining the scope of the claimed subject matter. 
    
    
     
       DRAWINGS 
         FIG. 1  is a block diagram illustrating functional systems of a representative power machine on which embodiments of the present disclosure can be advantageously practiced. 
         FIG. 2  is a perspective view showing generally a front of a power machine in the form of a small articulated loader on which embodiments disclosed in this specification can be advantageously practiced. 
         FIG. 3  is a perspective view showing generally a back of the power machine shown in  FIG. 2 . 
         FIG. 4  is a block diagram illustrating components of a hydraulic power system of a loader such as the loader of  FIGS. 2 and 3 . 
         FIG. 5  is a perspective view showing generally a front of a power machine in the form of a compact loader on which embodiments disclosed in this specification can be advantageously practiced, with a hydraulic actuator circuit. 
         FIG. 6  is a perspective view showing generally a front of a power machine in the form of a compact loader on which embodiments disclosed in this specification can be advantageously practiced, with a hydraulic sub-assembly according to embodiments of the disclosure. 
         FIG. 7  is a side elevation view of a first side of a hydraulic sub-assembly according to embodiments of the disclosure. 
         FIG. 8  is a side elevation view of a second side of the hydraulic sub-assembly of  FIG. 7  according to embodiments of the disclosure. 
         FIG. 9  is a top plan view of the hydraulic sub-assembly of  FIG. 7  according to embodiments of the disclosure. 
         FIG. 10  is a perspective view showing generally a rear of the hydraulic sub-assembly of  FIG. 7  according to embodiments of the disclosure. 
         FIG. 11  is a side perspective view of the hydraulic sub-assembly of  FIG. 7  installed on a power machine of the type shown in  FIG. 6 , to at least partially define a structural side wall of a cab of the power machine, according to embodiments of the disclosure. 
         FIG. 12  is a perspective view showing generally a rear of the cab of  FIG. 11 , having the hydraulic sub-assembly of  FIG. 7  installed thereto, according to embodiments of the disclosure. 
         FIG. 13  is a flowchart illustrating a method of manufacturing hydraulic sub-assemblies according to embodiments of the disclosure. 
     
    
    
     DESCRIPTION 
     The concepts disclosed in this discussion are described and illustrated by referring to exemplary embodiments. These concepts, however, are not limited in their application to the details of construction and the arrangement of components in the illustrative embodiments and are capable of being practiced or being carried out in various other ways. The terminology in this document is used for description and should not be regarded as limiting. Words such as “including,” “comprising,” and “having” and variations thereof as used herein are meant to encompass the items listed thereafter, equivalents thereof, as well as additional items. 
     As used herein in the context of a power machine, unless otherwise defined or limited, the term “lateral” refers to a direction that extends at least partly to a left or a right side of a front-to-back reference line defined by the power machine. Accordingly, for example, a lateral side wall of a cab of a power machine can be a left side wall or a right side wall of the cab, relative to a frame of reference of an operator who is within the cab or is otherwise oriented to operatively engage with controls of an operator station of the cab. 
     Some discussion below describes improved arrangements for hydraulic sub-assemblies of power machines, including sub-assemblies with support panels that have various hydraulic components mounted directly and indirectly thereto and that can be mounted to a frame of a power machine to secure the entire relevant sub-assembly to the power machine. Some embodiments can provide substantial improvements over conventional hydraulic sub-assemblies and related manufacturing methods. For example, securing relevant hydraulic components in a particular arrangement on a support panel, to form hydraulic sub-assembly before assembling the hydraulic sub-assembly onto a power machine, can reduce the time to complete a production build of the power machine, improve quality assurance, reduce inventory costs, and reduce the labor and overhead necessary to complete assembly of the power machine. 
     In some embodiments, a plurality of components can be secured to a support panel to be supported by the support panel relative to a cab of a power machine, such as a cab of a loader. Further, in some embodiments, one or more components of a sub-assembly can be secured in particular locations and orientations relative to other components of the sub-assembly or other related structures, such as on an opposite side of a support panel from various other components or in a particular location relative to an operator station of a power machine. This can be useful, for example, to help to account for various design constraints of different power machines and to improve operator experience during operation of the power machine. 
     In some embodiments, a plurality of hydraulic components for can be secured to a support panel, and the support panel can be installed as a structural portion of a power machine. For example, a plurality of hydraulic components for control of a power machine can be secured to a support panel that can then be installed as a structural side wall of a cab of the power machine. Thus, installation of the support panel can provide structural integrity for a portion of the cab while also appropriately orienting the hydraulic components for operation of the power machine. In this regard, some embodiments can include a support panel that provides a rigid side wall of a cab, while also disposing operator input devices to be easily accessible by an operator within the cab and at least partly isolating the operator from noise, vibration, leaks, or other potential effects of the operation of other components supported by the support panel. 
     As used herein, “structural portion” generally refers to a component of a larger structure or assembly that provides a substantial (e.g., majority) portion of the structural strength of an associated part of the larger structure or assembly. Accordingly, for example, a rigid metal side panel that forms a wall of a cab may generally be a structural portion of the cab, whereas a plastic or otherwise primarily ornamental cover for such a wall may generally not be a structural portion of the cab. 
     These concepts can be practiced on various power machines, as will be described below. A representative power machine on which the embodiments can be practiced is illustrated in diagram form in  FIG. 1  and one example of such a power machine is illustrated in  FIGS. 2-3  and described below before any embodiments are disclosed. For the sake of brevity, only one power machine is discussed. However, as mentioned above, the embodiments below can be practiced on any of a number of power machines, including power machines of different types from the representative power machine shown in  FIGS. 2-3 . Power machines, for the purposes of this discussion, include a frame, at least one work element, and a power source that can provide power to the work element to accomplish a work task. One type of power machine is a self-propelled work vehicle. Self-propelled work vehicles are a class of power machines that include a frame, work element, and a power source that can provide power to the work element. At least one of the work elements is a motive system for moving the power machine under power. 
     Some embodiments of the disclosure are presented below in the context of articulated loaders, with hydraulic sub-assemblies and other relevant components arranged on and secured to pivotable front frames of the articulated loaders. In some embodiments, hydraulic sub-assemblies according to the disclosure can be used with other types of power machines, including with other articulated power machines and with non-articulated power machines. 
     In addition, some embodiments of the disclosure are presented in the context of a hydraulic sub-assembly for controlling work functions, such as by controlling work actuators to maneuver one or more implements. In some embodiments, hydraulic sub-assemblies according to the disclosure can also be configured for other uses, such as to control other features, actuations, or movements of power machines. 
       FIG. 1  is a block diagram that illustrates the basic systems of a power machine  100  upon which the embodiments discussed below can be advantageously incorporated and can be any of a number of different types of power machines. The block diagram of  FIG. 1  identifies various systems on power machine  100  and the relationship between various components and systems. As mentioned above, at the most basic level, power machines for the purposes of this discussion include a frame, a power source, and a work element. The power machine  100  has a frame  110 , a power source  120 , and a work element  130 . Because power machine  100  shown in  FIG. 1  is a self-propelled work vehicle, it also has tractive elements  140 , which are themselves work elements provided to move the power machine over a support surface and an operator station  150  that provides an operating position for controlling the work elements of the power machine. A control system  160  is provided to interact with the other systems to perform various work tasks at least in part in response to control signals provided by an operator. 
     Certain work vehicles have work elements that can perform a dedicated task. For example, some work vehicles have a lift arm to which an implement such as a bucket is attached such as by a pinning arrangement. The work element, i.e., the lift arm can be manipulated to position the implement to perform the task. In some instances, the implement can be positioned relative to the work element, such as by rotating a bucket relative to a lift arm, to further position the implement. Under normal operation of such a work vehicle, the bucket is intended to be attached and under use. Such work vehicles may be able to accept other implements by disassembling the implement/work element combination and reassembling another implement in place of the original bucket. Other work vehicles, however, are intended to be used with a wide variety of implements and have an implement interface such as implement interface  170  shown in  FIG. 1 . At its most basic, implement interface  170  is a connection mechanism between the frame  110  or a work element  130  and an implement, which can be as simple as a connection point for attaching an implement directly to the frame  110  or a work element  130  or more complex, as discussed below. 
     On some power machines, implement interface  170  can include an implement carrier, which is a physical structure movably attached to a work element. The implement carrier has engagement features and locking features to accept and secure any of a number of different implements to the work element. One characteristic of such an implement carrier is that once an implement is attached to it, the implement carrier is fixed to the implement (i.e. not movable with respect to the implement) and when the implement carrier is moved with respect to the work element, the implement moves with the implement carrier. The term implement carrier as used herein is not merely a pivotal connection point, but rather a dedicated device specifically intended to accept and be secured to various different implements. The implement carrier itself is mountable to a work element  130  such as a lift arm or the frame  110 . Implement interface  170  can also include one or more power sources for providing power to one or more work elements on an implement. Some power machines can have a plurality of work elements with implement interfaces, each of which may, but need not, have an implement carrier for receiving implements. Some other power machines can have a work element with a plurality of implement interfaces so that a single work element can accept a plurality of implements simultaneously. Each of these implement interfaces can, but need not, have an implement carrier. 
     Frame  110  includes a physical structure that can support various other components that are attached thereto or positioned thereon. The frame  110  can include any number of individual components. Some power machines have frames that are rigid. That is, no part of the frame is movable with respect to another part of the frame. Other power machines have at least one portion that can move with respect to another portion of the frame. For example, excavators can have an upper frame portion that rotates with respect to a lower frame portion. Other work vehicles have articulated frames such that one portion of the frame pivots with respect to another portion for accomplishing steering functions. 
     Frame  110  supports the power source  120 , which can provide power to one or more work elements  130  including the one or more tractive elements  140 , as well as, in some instances, providing power for use by an attached implement via implement interface  170 . Power from the power source  120  can be provided directly to any of the work elements  130 , tractive elements  140 , and implement interfaces  170 . Alternatively, power from the power source  120  can be provided to a control system  160 , which in turn selectively provides power to the elements that capable of using it to perform a work function. Power sources for power machines typically include an engine such as an internal combustion engine and a power conversion system such as a mechanical transmission or a hydraulic system that can convert the output from an engine into a form of power that is usable by a work element. Other types of power sources can be incorporated into power machines, including electrical sources or a combination of power sources, known generally as hybrid power sources. 
       FIG. 1  shows a single work element designated as work element  130 , but various power machines can have any number of work elements. Work elements are typically attached to the frame of the power machine and movable with respect to the frame when performing a work task. In addition, tractive elements  140  are a special case of work element in that their work function is generally to move the power machine  100  over a support surface. Tractive elements  140  are shown separate from the work element  130  because many power machines have additional work elements besides tractive elements, although that is not always the case. Power machines can have any number of tractive elements, some or all of which can receive power from the power source  120  to propel the power machine  100 . Tractive elements can be, for example, wheels attached to an axle, track assemblies, and the like. Tractive elements can be mounted to the frame such that movement of the tractive element is limited to rotation about an axle (so that steering is accomplished by a skidding action) or, alternatively, pivotally mounted to the frame to accomplish steering by pivoting the tractive element with respect to the frame. 
     Power machine  100  includes an operator station  150  that includes an operating position from which an operator can control operation of the power machine. In some power machines, the operator station  150  is defined by an enclosed or partially enclosed cab. Some power machines on which the disclosed embodiments may be practiced may not have a cab or an operator compartment of the type described above. For example, a walk behind loader may not have a cab or an operator compartment, but rather an operating position that serves as an operator station from which the power machine is properly operated. More broadly, power machines other than work vehicles may have operator stations that are not necessarily similar to the operating positions and operator compartments referenced above. Further, some power machines such as power machine  100  and others, whether they have operator compartments, operator positions or neither, may be capable of being operated remotely (i.e. from a remotely located operator station) instead of or in addition to an operator station adjacent or on the power machine. This can include applications where at least some of the operator-controlled functions of the power machine can be operated from an operating position associated with an implement that is coupled to the power machine. Alternatively, with some power machines, a remote-control device can be provided (i.e. remote from both the power machine and any implement to which is it coupled) that is capable of controlling at least some of the operator-controlled functions on the power machine. 
       FIGS. 2-3  illustrate a loader  200 , which is one particular example of a power machine of the type illustrated in  FIG. 1  where the embodiments discussed below can be advantageously employed. Loader  200  is an articulated loader with a front mounted lift arm assembly  230 , which in this example is a telescopic lift arm. Loader  200  is one particular example of the power machine  100  illustrated broadly in  FIG. 1  and discussed above. To that end, features of loader  200  described below include reference numbers that are generally similar to those used in  FIG. 1 . For example, loader  200  is described as having a frame  210 , just as power machine  100  has a frame  110 . The description herein of loader  200  with references to  FIGS. 2-3  provides an illustration of the environment in which the embodiments discussed below can be practiced and this description should not be considered limiting especially as to the description of features that loader  200  that are not essential to the disclosed embodiments. Such features may or may not be included in power machines other than loader  200  upon which the embodiments disclosed below may be advantageously practiced. Unless specifically noted otherwise, embodiments disclosed below can be practiced on a variety of power machines, with the loader  200  being only one of those power machines. For example, some or all of the concepts discussed below can be practiced on many other types of work vehicles such as various other loaders, excavators, trenchers, and dozers, to name but a few examples. 
     Loader  200  includes frame  210  that supports a power system  220  that can generate or otherwise provide power for operating various functions on the power machine. Frame  210  also supports a work element in the form of lift arm assembly  230  that is powered by the power system  220  and that can perform various work tasks. As loader  200  is a work vehicle, frame  210  also supports a traction system  240 , which is also powered by power system  220  and can propel the power machine over a support surface. The lift arm assembly  230  in turn supports an implement interface  270  that includes an implement carrier  272  that can receive and secure various implements to the loader  200  for performing various work tasks and power couplers  274 , to which an implement can be coupled for selectively providing power to an implement that might be connected to the loader. Power couplers  274  can provide sources of hydraulic or electric power or both. The loader  200  includes a cab  250  that defines an operator station  255  from which an operator can manipulate various control devices to cause the power machine to perform various work functions. Cab  250  includes a canopy  252  that provides a roof for the operator compartment and is configured to have an entry  254  on one side of the seat (in the example shown in  FIG. 3 , the left side) to allow for an operator to enter and exit the cab  250 . Although cab  250  as shown does not include any windows or doors, a door or windows can be provided. 
     The operator station  255  includes an operator seat  258  and the various operation input devices  260 , including control levers that an operator can manipulate to control various machine functions. Operator input devices can include a steering wheel, buttons, switches, levers, sliders, pedals and the like that can be stand-alone devices such as hand operated levers or foot pedals or incorporated into hand grips or display panels, including programmable input devices. Actuation of operator input devices can generate signals in the form of electrical signals, hydraulic signals, and/or mechanical signals. Signals generated in response to operator input devices are provided to various components on the power machine for controlling various functions on the power machine. Among the functions that are controlled via operator input devices on power machine  100  include control of the tractive system  240 , the lift arm assembly  230 , the implement carrier  272 , and providing signals to any implement that may be operably coupled to the implement. 
     Loaders can include human-machine interfaces including display devices that are provided in the cab  250  to give indications of information relatable to the operation of the power machines in a form that can be sensed by an operator, such as, for example, audible and/or visual indications. Audible indications can be made in the form of buzzers, bells, and the like or via verbal communication. Visual indications can be made in the form of graphs, lights, icons, gauges, alphanumeric characters, and the like. Displays can be dedicated to providing dedicated indications, such as warning lights or gauges, or dynamic to provide programmable information, including programmable display devices such as monitors of various sizes and capabilities. Display devices can provide diagnostic information, troubleshooting information, instructional information, and various other types of information that assists an operator with operation of the power machine or an implement coupled to the power machine. Other information that may be useful for an operator can also be provided. Other power machines, such as walk behind loaders may not have a cab nor an operator compartment, nor a seat. The operator position on such loaders is generally defined relative to a position where an operator is best suited to manipulate operator input devices. 
     Various power machines that can include and/or interact with the embodiments discussed below can have various different frame components that support various work elements. The elements of frame  210  discussed herein are provided for illustrative purposes and should not be considered to be the only type of frame that a power machine on which the embodiments can be practiced can employ. As mentioned above, loader  200  is an articulated loader and as such has two frame members that are pivotally coupled together at an articulation joint. For the purposes of this document, frame  210  refers to the entire frame of the loader. Frame  210  of loader  200  includes a front frame member  212  and a rear frame member  214 . The front and rear frame members  212 ,  214  are coupled together at an articulation joint  216 . Actuators (not shown) are provided to rotate the front and rear frame members  212 ,  214  relative to each other about an axis  217  to accomplish a turn. 
     The front frame member  212  supports and is operably coupled to the lift arm  230  at joint  216 . A lift arm cylinder (not shown, positioned beneath the lift arm  230 ) is coupled to the front frame member  212  and the lift arm  230  and is operable to raise and lower the lift arm under power. The front frame member  212  also supports front wheels  242 A and  242 B. Front wheels  242 A and  242 B are mounted to rigid axles (the axles do not pivot with respect to the front frame member  212 ). The cab  250  is also supported by the front frame member  212  so that when the front frame member  212  articulates with respect to the rear frame member  214 , the cab  250  moves with the front frame member  212  so that it will swing out to either side relative to the rear frame member  214 , depending on which way the loader  200  is being steered. 
     The rear frame member  214  supports various components of the power system  220  including an internal combustion engine. In addition, one or more hydraulic pumps are coupled to the engine and supported by the rear frame member  214 . The hydraulic pumps are part of a power conversion system to convert power from the engine into a form that can be used by actuators (such as cylinders and drive motors) on the loader  200 . Power system  220  is discussed in more detail below. In addition, rear wheels  244 A and  244 B are mounted to rigid axles that are in turn mounted to the rear frame member  214 . When the loader  200  is pointed in a straight direction (i.e., the front frame portion  212  is aligned with the rear frame portion  214 ), a portion of the cab is positioned over the rear frame portion  214 . 
     The lift arm assembly  230  shown in  FIGS. 2-3  is one example of many different types of lift arm assemblies that can be attached to a power machine such as loader  200  or other power machines on which embodiments of the present discussion can be practiced. The lift arm assembly  230  is a radial lift arm assembly, in that the lift arm is mounted to the frame  210  at one end of the lift arm assembly and pivots about the mounting joint  216  as it is raised and lowered. The lift arm assembly  230  is also a telescoping lift arm. The lift arm assembly includes a boom  232  that is pivotally mounted to the front frame member  212  at joint  216 . A telescoping member  234  is slidably inserted into the boom  232  and telescoping cylinder (not shown) is coupled to the boom and the telescoping member and is operable to extend and retract the telescoping member under power. The telescoping member  234  is shown in  FIGS. 2 and 3  in a fully retracted position. The implement interface  270  including implement carrier  272  and power couplers  274  are operably coupled to the telescoping member  234 . An implement carrier mounting structure  276  is mounted to the telescoping member. The implement carrier  272  and the power couplers  274  are mounted to the positioning structure. A tilt cylinder  278  is pivotally mounted to both the implement carrier mounting structure  276  and the implement carrier  272  and is operable to rotate the implement carrier with respect to the implement carrier mounting structure under power. Among the operator controls  260  in the operator station  255  are operator controls to allow an operator to control the lift, telescoping, and tilt functions of the lift arm assembly  230 . 
     Other lift arm assemblies can have different geometries and can be coupled to the frame of a loader in various ways to provide lift paths that differ from the radial path of lift arm assembly  230 . For example, some lift paths on other loaders provide a radial lift path. Others have multiple lift arms coupled together to operate as a lift arm assembly. Still other lift arm assemblies do not have a telescoping member. Others have multiple segments. Unless specifically stated otherwise, none of the inventive concepts set forth in this discussion are limited by the type or number of lift arm assemblies that are coupled to a particular power machine. 
       FIG. 4  illustrates power system  220  in more detail. Broadly speaking, power system  220  includes one or more power sources  222  that can generate and/or store power for operating various machine functions. On loader  200 , the power system  220  includes an internal combustion engine. Other power machines can include electric generators, rechargeable batteries, various other power sources or any combination of power sources that can provide power for given power machine components. The power system  220  also includes a power conversion system  224 , which is operably coupled to the power source  222 . Power conversion system  224  is, in turn, coupled to one or more actuators  226 , which can perform a function on the power machine. Power conversion systems in various power machines can include various components, including mechanical transmissions, hydraulic systems, and the like. The power conversion system  224  of power machine  200  includes a hydrostatic drive pump  224 A, which provides a power signal to drive motors  226 A,  226 B,  226 C and  226 D. The four drive motors  226 A,  226 B,  226 C and  226 D in turn are each operably coupled to four axles,  228 A,  228 B,  228 C and  228 D, respectively. Although not shown, the four axles are coupled to the wheels  242 A,  242 B,  244 A, and  244 B, respectively. The hydrostatic drive pump  224 A can be mechanically, hydraulically, and/or electrically coupled to operator input devices to receive actuation signals for controlling the drive pump. The power conversion system also includes an implement pump  224 B, which is also driven by the power source  222 . The implement pump  224 B is configured to provide pressurized hydraulic fluid to a work actuator circuit  238 . Work actuator circuit  238  is in communication with work actuator  239 . Work actuator  239  is representative of a plurality of actuators, including the lift cylinder, tilt cylinder, telescoping cylinder, and the like. The work actuator circuit  238  can include valves and other devices to selectively provide pressurized hydraulic fluid to the various work actuators represented by block  239  in  FIG. 4 . In addition, the work actuator circuit  238  can be configured to provide pressurized hydraulic fluid to work actuators on an attached implement. 
     The description of power machine  100  and loader  200  above is provided for illustrative purposes, to provide illustrative environments on which the embodiments discussed below can be practiced. While the embodiments discussed can be practiced on a power machine such as is generally described by the power machine  100  shown in the block diagram of  FIG. 1  and more particularly on a loader such as track loader  200 , unless otherwise noted or recited, the concepts discussed below are not intended to be limited in their application to the environments specifically described above. 
       FIG. 5  illustrates an example of a loader  300 , which is one particular example of the power machine  100  illustrated broadly in  FIG. 1  and discussed above, and relative to which the embodiments discussed herein can be advantageously employed. The loader  300  is similar in some ways to the loader  200  described above and like numbers represent similar parts. For example, like the loader  200 , the loader  300  includes an articulated frame  310 , a lift arm assembly  330 , a work actuator circuit  338 , a work actuator  339 , and an operator enclosure that is at least partly defined by a cab  350 . 
     Certain components of the work actuator circuit  338  are shown schematically in  FIG. 5 , superimposed over the loader  300  to represent potential mounting locations for the components on the loader  300 . Among other components, for example, the work actuator circuit  338  includes a pilot valve  362  and a control valve  364  to collectively control the routing of pressurized hydraulic fluid to the one or more work actuators  339 , such as one or more hydraulic cylinders configured to move the lift arm assembly  330 . In some arrangements, the work actuator circuit  338  can include other valves and other devices to selectively provide pressurized hydraulic fluid to the various work actuators  339  or other hydraulic components. 
     In conventional arrangements, the pilot valve  362  and control valve  364  may be individually installed on the loader  300 , which may result in certain inefficiencies. For example, the need to individually position the pilot valve  362  and the control valve  364  on the loader  300  may result in increased manufacturing time and costs as well as more burdensome quality control. Individual attachment of each of multiple components of the work actuator circuit  338  to the loader  300  may also increase design constraints for the loader  300  as a whole, including because multiple components of the loader, such as the frame  310 , may accordingly need to include multiple, dispersed reinforcement or attachment points to support the components of the work actuator circuit  338 . In addition, due to the dispersed arrangement of the relevant components of the work actuator circuit  338 , and the large number and lengths of tube lines and flexible hoses that can be required, access to and management of the conventional work actuator circuit  338  for maintenance or other tasks can be difficult. 
     Embodiments of the disclosure can address one or more of the issues noted above, or others. For example, some embodiments of the invention can include a support panel to which are attached multiple components (e.g., a pilot valve, a control valve, etc.) of a work actuator circuit. As also alluded to above, this can help to expedite installation, removal, and maintenance of the work actuator circuit, which may decrease manufacturing and maintenance time and costs. For example, attachment of multiple components to a single support panel before the support panel is attached to a frame of a power machine can simplify and accelerate manufacture of the power machine, including due to the improved ease of assembling large or complex portions of hydraulic circuits prior to installation of the circuit portions (or the circuits as a whole) on the power machine frame. Additionally, use of a support panel to attach multiple components to a power machine can result in a more robust arrangement for support of the multiple components, which can lead to improved overall durability and reduced maintenance load for the power machine, including simplified replacement of entire hydraulic circuits (or multi-component portions thereof). 
       FIG. 6  illustrates a loader  400  on which the embodiments discussed herein can be advantageously employed. The loader  400  is one particular example of the power machine  100  illustrated broadly in  FIG. 1  and discussed above in reference to  FIGS. 1-4 . The loader  400  is similar in some ways to the loaders  200 ,  300  described above, with like numbers representing similar parts. For example, the loader  400  includes an articulated frame  410 , a lift arm assembly  430 , a work actuator circuit  438 , a cab  450  that at least partly defines an operator station  455 , and one or more work actuators  439  that may help to operate the lift arm assembly  430  or other devices. 
     To allow the loader  400  to execute various operations, the frame  410  includes a front frame member  412  that supports the cab  450  and is coupled at an articulation joint (not shown in  FIG. 6 ) to a rear frame member  414 . This arrangement allows the front of the loader  400 , including the cab  450 , to pivot relative to the rear of the loader  400 , via the articulation joint. In other embodiments, different relative sizes of the front and rear of the loader  400  and other different configurations are possible, including configurations with different proportions of the cab  450  extending forward or rearward of the articulation joint or otherwise positioned relative to the front and rear frame members  412 ,  414  of the loader  400 , configurations with differently shaped or sized cabs, different types of operator stations or control devices, and so on. 
     Various configurations are possible for a work actuator circuit of the loader  400 , depending on the work functions to be performed (e.g., operation of the work actuators  439  in different ways to control an implement (not shown)). For example, the work actuator circuit  438  is fluidly coupled with a tank  480  that is configured to hold a supply of pressurized hydraulic fluid. The pressurized hydraulic fluid may include, for example, a dedicated hydraulic oil, an engine lubrication oil, a transmission lubrication oil, and the like. One or more pumps  424  are configured to draw fluid from and return fluid to the tank  480  to allow operation of one or more hydraulic components within the work actuator circuit  438 . 
     To facilitate improved installation, operation, and maintenance relative to conventional systems, multiple components of the work actuator circuit  438  are combined in a hydraulic sub-assembly  448 , which can be assembled remotely from the loader  400  and installed on the loader  400 , once assembled, as an integrated unit. Once the hydraulic sub-assembly  448  has been installed on the loader and appropriately integrated with other components of the work actuator circuit  438  or other hydraulic systems (e.g., by connection of appropriate hydraulic conduits), pressurized hydraulic fluid can be delivered from the tank  480 , or elsewhere, to a plurality of components included on the hydraulic sub-assembly  448 , such as control or pilot valves, hydraulic coolers, operator input devices (e.g., joysticks), and so on. 
     In some embodiments, a hydraulic sub-assembly can include a support panel that can support multiple hydraulic components of the hydraulic sub-assembly and that can be secured to a frame of a loader to support the multiple hydraulic components relative to the frame. The hydraulic sub-assembly  448 , for example, as also shown in  FIGS. 7-9 , includes a support panel  482  that is configured to be positioned along and mounted to the cab  450 , to at least partially form a sidewall of the cab  450 , another portion of the cab  450 , or another relevant structural portion of the loader  400 . A trim panel  484  can be positioned over the support panel  482  such that the support panel  482  is concealed between the operator station  455  and the trim panel  484  in an assembled state. 
     In some embodiments, a hydraulic sub-assembly or components thereof can exhibit geometries that conform with (i.e., are substantially geometrically similar to) parts of a loader to which the sub-assembly is attached. In the embodiment illustrated in  FIG. 6 , because the support panel  482  forms part of the cab  450 , the support panel  482  is configured to pivot with the front of the loader  400 , relative to the rear of the loader  400 , via movement of the articulation joint. Accordingly, it can be useful for the trim panel  484 , the support panel  482 , and the hydraulic sub-assembly  448  generally, to exhibit a generally complementary geometry to a portion of the side of the cab  450 . In this regard, the support panel  482  includes a narrow, elongate rear portion  482   a  and a wide, downwardly extending front portion  482   b , with the rear portion  482   a  generally also forming an upper, extended portion of a dog-leg profile of the support panel  482 . Similarly, the hydraulic sub-assembly  448  as a whole generally exhibits a narrower, elongate rear portion and a wider, downwardly extending front portion. 
     When the support panel  482  is secured to the cab  450 , forming in particular a structural lateral side wall of the cab  450  in the illustrated embodiment, the rear portion  482   a  extends rearward along the side of the cab  450 , to be disposed vertically over a portion of the rear frame member  414 , and the one or more pumps  424 . Due in part to this narrower rear geometry, the rear portion  482   a  of the support panel  482 , and the hydraulic sub-assembly  448  generally, can pivot with the other structures of the cab  450  along paths of travel that extend above parts of the rear frame member  414  (e.g., above the rear wheels of the loader  400 ). 
     Although the front portion  482   b  also pivots with the other structures of cab  450  and the front frame portion  412 , in the illustrated embodiment it does not move to extend substantially over the rear frame member  414 . Thus, similarly to the cab  450  generally, the front portion  482   b  of the support panel  482  exhibits a vertically wider, downwardly extending geometry (relative to the rear portion  482   a ), and can accordingly be used to support relatively large components or multiple components of the hydraulic sub-assembly  448 . Correspondingly, the front portion  482   b  can also provide coverage and structural support for a substantial portion of a lateral side of the cab  450 , including a majority of a front-to-back depth of the lateral side area of the cab  450  or the operator station  455 , and a majority of the bottom-to-top height of the cab  450  or the operator station  455  below the lateral side window. 
     Although the geometry of the support panel  482  and the geometry of the hydraulic sub-assembly  448  generally form a portion of a side wall of the cab  450  and accordingly exhibit a similar geometry as part of the larger profile of the cab  450 , other configurations are also possible. For example, some hydraulic sub-assemblies can exhibit other profiles, including profiles that are substantially similar to other parts of a power machine (e.g., other parts of a cab, a front frame of an articulated loader, or a rear frame of an articulated loader). In some embodiments, a cab may be secured to a rear frame member of a power machine and the front frame member of the power machine may pivot relative to the support panel. Correspondingly, a support panel of a hydraulic sub-assembly (e.g., similar to the panel  482 ) can be secured to the rear frame member, including via attachment of the support panel to the cab. In some embodiments, a support panel of a sub-assembly can be secured to a different side of a cab than is shown in  FIG. 6  for the cab  450 . 
     In some embodiments, some components of a hydraulic sub-assembly can be fully contained within a perimeter of a support panel that secures the components to a cab of a power machine. For example, as also discussed below, a control valve  486  and a pilot valve  490  are secured to the support panel  482  on an opposite side of the panel  482  from the operator station  455  and fully within the laterally projected perimeter of the panel  482 . Accordingly, the control valve  486  and the pilot valve  490  may be fully shielded, in a lateral direction, relative to the operator station  455 . However, in some embodiments, part or all of the hydraulic or other components of a hydraulic sub-assembly, such as components of a work actuator circuit, may extend partly or fully outside of a perimeter of a relevant support panel. 
     A support panel can be configured as a unitary body or as multiple bodies that are secured together, depending on the needs of a particular power machine, the necessary or desired constraints on an installation method for the support panel (and the hydraulic sub-assembly as a whole), the size and other aspects of a structural portion of a cab that is defined by the support panel, or other factors. In the example configuration shown in  FIG. 7 , the support panel  482  is a rigid unitary (i.e., single-piece) body, as can be formed from a stamped sheet metal blank, or through molding, casting, or otherwise. When stamped from an appropriate gauge of sheet metal, for example, the support panel  482  may exhibit significant durability and reliability, including as can allow the support panel  482  to provide a structural portion of a cab, and can be readily manufactured at relatively low cost, using known techniques. However, other materials and manufacturing techniques are possible. In some embodiments, a support panel can be formed from multiple sheet-metal or other components that are secured together using fasteners, welding, adhesives, or other techniques. 
     As also discussed above, a support panel of a hydraulic sub-assembly can be used to support multiple hydraulic and other components, for unified installation on a power machine. In different embodiments, different numbers and types of components can be included in a hydraulic sub-assembly and secured to a support panel. For example, support panels for some hydraulic-sub-assemblies can be configured to support hydraulic components including operator input devices (e.g., hydraulically operated joysticks), control valves, pilot valves, coolers, filters, conduits, fittings, and so on, any number of which can be secured to the support panel before the support panel is installed on the relevant power machine. In some embodiments, some components can be secured together or hydraulically connected with each other before or after being secured to a support panel. In some embodiments, some components can be secured to a support panel indirectly, while still being configured to be supported relative to a power machine frame by the support panel, including by being directly secured to other components that are in turn secured, directly or indirectly, to the support panel. 
     As shown in  FIGS. 7 and 8 , in particular, a plurality of components for the work actuator circuit  438  are secured to and supported by the support panel  482 . In particular, in the illustrated embodiment, components secured to the support panel  482  as part of the hydraulic sub-assembly  448  include: the control valve  486  for operation of work functions (e.g., via control of one or more work actuators  439  (see  FIG. 6 )); an operator input device  488  configured as a hydraulic joystick; the pilot valve  490  to facilitate interoperation of the control valve  486  and the operator input device  488 ; multiple hydraulic conduits  492 , including multiple flexible hoses and multiple rigid tube lines; a set of cooler brackets  494  (see  FIG. 8 ); a hydraulic cooler  496  secured to support panel  482  via the cooler brackets  494 ; and a hydraulic filter  498  secured to the support panel via a filter bracket  499 . Collectively, these components (and others) can form part of the hydraulic sub-assembly  448  and, once appropriately installed, can control or interoperate with each other and other hydraulic components of a power machine (e.g., the loader  400 ), including for control of one or more work actuators or other components of the power machine. Further, because these components are collectively secured to and supported by the support panel  482 , they can be initially configured and interconnected (in whole or in part) remotely from a loader, then can be collectively secured to the loader at any number of stages of manufacturing. In particular, the hydraulic assembly  448  is configured to be secured to the cab  450  (see  FIG. 6 ), at a convenient manufacturing stage, with the support panel  482  forming a structural portion of the cab  450  to a lateral side of the operator station  455  (see  FIGS. 6 and 11 ). 
     In this regard, for example, portions of the cab  450  can be formed separately from the support panel  482 , such as via creation of a unitary weldment, and then the cab  450  can be completed at least partly by connecting the support panel  482  thereto. Components of a hydraulic sub-assembly, such as a support panel thereof, can be secured to a power machine in a variety of ways, including using welding, or rivets or other fasteners, depending on relevant design and manufacturing constraints for the support panel, for other components of the sub-assembly, or for a cab or other structure of the power machine. 
     Components of a hydraulic sub-assembly can be secured to a support panel in a variety of ways, depending on appropriate design and manufacturing constraints for the support panel, the components themselves, and the associated power machine in general. As shown in  FIG. 8 , for example, the support panel  482  includes multiple locating features  463  and fastener locations  465  for arranging components on and attaching the components to the support panel  482 . For example, among other features, the front portion  482   b  of the support panel  482  defines a plurality of fastener locations  465 , configured as bolt holes, for attaching the cooler bracket  494 . Likewise, the rear portion  482   a  of the support panel  482  defines a plurality of fastener locations  465  for bolts for the pilot valve  490 , and an intermediate portion of the support panel  482  defines fastener locations  465  for bolts for the control valve  486 . The various locating features  463 , configured in the illustrated example as square locating apertures, are also arranged around the support panel  482  in order to help locate various components for attachment to the support panel  482 . In some embodiments, a locating feature can help to temporarily (e.g., non-rigidly) secure a component in an appropriate orientation for a bolt or other more permanent fastener to be installed. 
     In other embodiments, other configurations are possible, including configurations with differently arrayed, differently shaped, or otherwise modified fastener locations, different types of location features (e.g., dimples or other protrusions), and so on. For example, some hydraulic sub-assemblies can include fasteners that are integrally formed with or otherwise secured to a support panel prior to the attachment of components using those fasteners, including non-threaded (e.g., snap-in or snap-on) fasteners or others. As another example, some support panels can be formed with depressions, protrusions, or other features that are configured to help locate or secure certain components to the support panels. 
     Other features can also be provided. For example, the front portion  482   b  of the support panel  482  also defines an opening  464  that is substantially aligned with one side of the cooler  496 . The opening  464  can provide a number of benefits, including reducing the overall material required for the support panel  482 , helping to ensure adequate air flow to, from, or around the cooler  496 , allowing access to fittings or other components (not shown) on the exposed side of the cooler  496  (e.g., for maintenance operations), allowing one or more of the conduits  492  to pass between opposing sides of the support panel  482 , and so on. 
     As also noted above, the control valve  486  can be configured to actuate one or more of the work actuators  439  (see  FIG. 6 ) by controlling flow of hydraulic fluid, through one or more of the conduits  492 , to the work actuators  439  or to other components of the power machine. To accommodate appropriate routing and pressures for such flow, or for other hydraulic operations, the rigid tube lines of the conduits  492  (and other tube lines) can be formed of a metallic material, or other practicable material, and may maintain a predetermined geometry once installed. In some embodiments, the conduits  492  can be formed into the illustrated geometry prior to installation on the support panel  482 , or after installation on the support panel  482  but prior to installation of the support panel  482  on the cab  450 , such as may help to streamline assembly and final installation of the associated hydraulic circuits. The flexible hoses of the conduits  492  can be formed of a polymeric material, an elastomeric material, a combination thereof, or any other practicable material that allows for flexing or bending of the hoses during or after installation on the support panel  482 . 
     In the embodiment shown in  FIGS. 7-10 , the operator input device  488  is mounted on the control valve  486  and is thus secured to the support panel  482  via the control valve  486  (and various fasteners  466 ). Attachment of the operator input device  488  to the support panel  482  via the control valve  486  can help to improve manufacturing processes by allowing for assembly of the control valve  486  and the operator input device  488  separately from the relevant power machine or even, initially, separately from the support panel  482 . This arrangement can also reduce the need for additional conduits to hydraulically connect the two components over extended distances. In some embodiments, however, an operator input device can be secured directly to a support panel or can be used to secure other components (e.g., valves) to a support panel. 
     The operator input device  488  is in hydraulic communication with the control valve  486 , such that the operator input device  488  can be used to control various work functions (e.g., at the lift arm assembly  430 ) via the control valve  486 . Although illustrated as a joystick in  FIGS. 7-12 , the operator input device  488  can be any device that is capable of accepting a command from an operator (e.g., for control of a work function), including other joysticks, buttons, knobs, or other input devices. 
     The pilot valve  490  is secured to the support panel  482  via one or more of the fasteners  466  and positioned rearward of the control valve  486  when the support panel  482  is secured to the forward frame of the loader (see, e.g.,  FIG. 6 ). The pilot valve  490  is hydraulically coupled to the control valve  486  through one or more of the hydraulic conduits  492  and can regulate flow of fluid to and from the control valve  486  to assist in controlling work functions, such as the operation of an implement or other component of a power machine. The pilot valve  490  or other components can also be hydraulically coupled with the hydraulic fluid tank  480  shown schematically in  FIG. 6 . 
     As shown in  FIGS. 7-8 , the hydraulic filter  498  is secured on an opposite side of the support panel  482  from the control valve  486 , the operator input device  488 , the pilot valve  490 , the cooler bracket  494 , and the hydraulic cooler  496 . Accordingly, in some embodiments, the hydraulic filter  498  can be positioned to be supported on a side of the support panel  482  that is closer to the operator station  455 , once installed. 
     In some embodiments, a hydraulic filter (or other component) can be secured to a support panel indirectly, such as via a support bracket. As illustrated in  FIGS. 9-10 , for example, the hydraulic filter  498  is secured to the support panel  482  with a filter bracket  499 , which includes an attachment portion for securing the bracket to the support panel  482  (e.g., using fasteners or welding) and a support portion that extends in a perpendicular direction from the attachment portion (and from the support panel  482 , after installation). The hydraulic filter  498  is configured to be secured to the support portion of the filter bracket  499 , such that the filter bracket  499  secures the hydraulic filter  498  at a lateral offset from the support panel  482 , with conduits extending from the hydraulic filter  498  across the support panel  482  to other components of the hydraulic sub-assembly  448 . In some embodiments, the hydraulic filter  498  is positioned in a non-vertical orientation relative a ground surface. In such instances, the top of the filter  498  may be disposed further rearward than the bottom of the filter  498  to create additional clearance for rotation of the forward frame relative to the rear frame. Other configurations are possible, including configurations with brackets that are arranged to support a hydraulic filter at a different location (e.g., on a different side of a support panel or with different lateral or other offsets), configurations without support brackets for the filters, or configurations with different numbers or types of filters. 
     In some embodiments, a support panel can be configured to allow easy routing of hydraulic flow between opposing sides of the support panel. As shown in  FIG. 10 , for example, the support panel  482  defines a cutout  483  in general alignment with the hydraulic filter  498  and the filter bracket  499 . Generally, the cutout  483  or other cutouts in a support panel can allow hydraulic flow to pass across the support panel without being routed fully around a larger outer perimeter of the support panel. In particular, in the illustrated example, a conduit  492  from the filter  498  is arranged to extend through the cutout  483 , to transfer hydraulic fluid from the filter  498  to one or more components positioned on the opposing side of the support panel  482 , such as the pilot valve  490 , the control valve  486 , or the hydraulic cooler  496 . In other embodiments, other configurations are possible, including configurations with multiple cut-outs or no cut-outs at all. 
     In some embodiments, the filter  498  or other components can be fluidly coupled with the hydraulic cooler  496 , which is installed on a forward portion  482   b  of the support panel  482 , on an opposite lateral side of the support panel  482  from the filter  498 . The hydraulic cooler  496  is generally configured to cool the hydraulic fluid within the work actuator circuit  438 . In some embodiments, the hydraulic cooler  496  may additionally or alternatively function as a heat exchanger that is configured to cool any other fluid of the loader. In some embodiments, to further increase the flow of air along the hydraulic cooler  496 , a fan  468  is mounted on or within the hydraulic cooler  496 . As appropriate, the fan  468  can be driven by a motor, such as a hydraulically driven motor (not shown) within the hydraulic sub-assembly  448 , or any other suitable motor. 
     In the embodiment shown in  FIGS. 7-10 , the hydraulic cooler  496  is indirectly secured to the support panel  482  by the cooler brackets  494 . Further, the cooler brackets  494  have similar offset designs, such that the cooler brackets  494  support the hydraulic cooler  496  with the hydraulic cooler  496  spaced laterally apart from the support panel  482 . This laterally spaced (i.e., laterally offset) arrangement can provide clearance between the hydraulic cooler  496  and the support panel  482 , such that one or more of the conduits  492  can be positioned between the hydraulic cooler  496  and the support panel  482 , including when the support panel  482  is secured to the frame of the loader. The positioning of the one or more of the conduits  492  between the hydraulic cooler  496  and the support panel  482  can help to reduce the required length of the relevant conduits  492  by avoiding the need to route the conduits  492  around the cooler  496 . It can also protect the relevant conduits  492  during operation of the loader or can help to cool the fluid therein. Further, the lateral offset between the hydraulic cooler  496  and the support panel  482  can allow substantial air flow between the hydraulic cooler  496  and the support panel  482 , which may generally help to cool the hydraulic cooler  496  and thereby improve its thermal efficiency. 
     In different embodiments, different bracket configurations can be used, to appropriately support a hydraulic cooler or other component relative to a support panel. For example, as shown in  FIG. 9  in particular, the brackets  494  are configured as a set of substantially similar bracket members, each with a body portion  495  and a pair of opposing arms  497  that angle away from the respective body portion  495 . The body portion  495  and arms  497  of each bracket  494  can be formed as a unitary component or as a single piece that is integrally formed through any practicable manufacturing process. During installation, the body portion  495  is configured to be aligned with a set of fastener locations  465 , via which a set of fasteners can couple the brackets  494  to the support panel  482 . Likewise, each arm  497  can be aligned to couple the brackets  494  to the hydraulic cooler  496 . Use of two of the brackets  494 , for example, can allow the brackets  494  to be secured on opposing sides of the opening  464  (see  FIG. 8 ) in the support panel  482 , as may contribute to useful access to cooler  496  during installation or maintenance. 
     As also discussed above, in some embodiments, a support panel can be configured to at least partially define a lateral (or other) side of an operator station of a power machine, such as may usefully locate one or more components supported on the support panel relative to the operator station, while also providing appropriate structural strength and enclosing structures for the operator station. In this regard, for example, an operator station  455  is schematically illustrated in  FIG. 10 , as well as indicated relative to the cab  450  in  FIGS. 6, 11, and 12 . In other embodiments, other types of operator stations can be used, including operator stations that are not necessarily defined by part or all of a cab. 
     In embodiments of a power machine that include a cab, a support panel of a hydraulic sub-assembly, alone or in conjunction with one or more body panels, can at least partially define the cab, including by providing a structural portion of the cab. For example, as illustrated in  FIGS. 11 and 12 , the cab  450  includes, among other structures, a plurality of body panels  431  (including panels  431   a ,  431   b ), and a plurality pillars  435 , that define a portion of the cab  450  (e.g., a unitary weldment). Further, the cab  450  also includes the support panel  482 , which is secured to the weldment to collectively define an outer bound of the operator station  455 . In particular, the support panel  482  is secured to the weldment to provide a lateral inner structural side wall of the cab  450 , adjacent to the enclosed area of the operator station  455 , and generally below and laterally to the inside of the outer lateral side wall formed by the panel  431   a . In other embodiments, however, support panels of hydraulic sub-assemblies can form other structural portions of a cab or of an operator station thereof. 
     In different embodiments, a cab or operator station that is at least partly defined by a support panel of a hydraulic sub-assembly can be exhibit a variety of different configurations. For example, for the cab  450 , the body panels  431  at least partially define a forward wall  437  of the cab  450 , a floor pan  441 , a seat pan  443  that supports a seat (not shown in  FIGS. 11 and 12 ), a rear wall  445 , and a sidewall  447  opposite an entry  454 , among other portions. The one or more pillars  435  extend upwardly to support a canopy that provides a roof for the operator compartment. 
     Like the support panel  482 , the pillars  435  and body panels  431  may exhibit significant durability and reliability, and can be readily manufactured at relatively low cost, using known techniques. However, other materials and manufacturing techniques are possible. In some embodiments, the body panels  431  can be formed from multiple sheet-metal, or other, components that are secured together using fasteners, welding, adhesives, or other techniques. Likewise, the pillars  435  may be formed from as tubing (of any geometry) that is fabricated from any practicable material. The pillars  435  can have a thickness that is greater than the thickness of the body panels  431  and the support panel  482  of the sub-assembly to support the mounting of the body panels  431  and the support panel  482  thereto. In addition, the pillars  435  can have a square, tubular shape to support various body panels  431  and the support panel  484  at various offsets relative one another. Other components, such as a control panel, can also be supported by and coupled with the body panels  431 , the pillars  435 , and the support panel  482 . 
     In different embodiments, the side wall of a cab opposite an entry into the cab, or any other portion of the cab, can be defined by a support panel of a hydraulic sub-assembly alone or in combination with one or more body panels that together can provide support and rigidity to the cab. In some examples, additional components, such as a control panel, may intermediately couple with a support panel and a body panel, to provide aesthetic aspects for a cab, dispose relevant components for access by an operator, or to generally also provide support and rigidity to the cab. For example, as illustrated in  FIGS. 11 and 12 , a body panel  431   a  forms a first, upper and laterally outer portion of the sidewall  447 . The support panel  482  extends below the body panel  431   a  and forms a second, separate lower and laterally inner portion of the sidewall  447 . In addition, the support panel  482  is laterally offset from the body panel  431   a  and a control panel  449  extends laterally between the support panel  482  and the body panel  431   a . A first side of the control panel  449  may couple with the support panel  482  and a second opposite side of the control panel  449  may couple with the offset body panel  431   a  (e.g., using fasteners or welding). 
     In some embodiments, a control panel can be secured to a support panel of a hydraulic sub-assembly, including to provide substantial structural connections between the support panel and other portions of a cab. For example, as shown in  FIGS. 11 and 12  in particular, the control panel  449  includes a laterally extending surface  449   a  and a set of depending skirt portions  449   b ,  449   c  that extend from opposing sides of the laterally extending surface  449   a . The skirt portion  449   b  extends laterally inward of the support panel  482  and can be coupled the support panel  482  using one or more fasteners, or any other attachment method. The skirt portion  449   c  is positioned farther from the operator station  455  than the support panel  482  and is configured to be coupled with the body panel  431   a  that extends above the control panel  449  and the support panel  482 . The laterally extending surface  449   a , extending between the first and second skirt portions  449   b ,  449   c , can support various features and components. For example, the control panel  449  may define a cup holder or a storage compartment. In addition, the control panel  449  may support various operator input devices, display panels, or other components. In some embodiments, an operator input device (e.g., the device  488 ) that is secured to the support panel  482  can extend through the control panel  449  for engagement by an operator or interoperation with another component within the operator station  455 . 
     In some embodiments, a support panel may extend forwardly of the operator station and the columns that support the roof of the operator station, while still forming a side wall and a substantial structural support component of a cab. For example, as illustrated in  FIG. 11 , the front portion  482   b  of the support panel  482 , which defines the opening  464 , extends forwardly of the operator station  455 . The placement of the front portion  482   b  and, correspondingly, of the cooler  496  (see  FIG. 12 ) forward of the operator station  455  may provide various benefits. For example, as discussed above, the cooler  496  may include a fan. Further, the cooler  496  may exhaust substantial heat into the surroundings, as it cools the hydraulic fluid. During operation, noise from the fan can be minimized within the cab  450 , as can heating of the cab  450  by the cooler  496 , due to the placement of the cooler  496 , via the arrangement of the support panel  482 , forward of the operator station  455 . 
     As shown in  FIGS. 10-12 , the control valve  486 , the operator input device  488 , the pilot valve  490 , the cooler bracket  494 , and the hydraulic cooler  496  can be positioned on an opposite side of the support panel  482  from the operator station  455 . In some embodiments, including as illustrated in  FIGS. 10-12 , due to the offset orientation of the body panel  431   a  of the sidewall  447  relative to the support panel  482  disposed below the body panel  431   a , a plurality of these components may also be disposed laterally inward of the body panel  431   a  of the sidewall  447  and below a portion of the control panel  449 . This can be useful, for example, in order to dispose these components for easy access during maintenance, as well as to shield an operator from undesired exposure to these components (e.g., by orienting a large number of potential leak points away from the operator). Further, despite being on an opposite lateral side of the support panel  482  relative to the operator station  455 , the operator input device  488  is positioned to extend through the control panel  449  for engagement by an operator from within the operator station  455 . This arrangement can allow for easy access to the operator input device  488  by an operator within the operator station  455 , for control of one or more work functions, while still preserving the various benefits noted above. 
     In some embodiments, configuration of certain components to be secured to a support panel with lateral offsets from the support panel can help to appropriately locate those components relative to other systems of a power machine. For example, as shown in  FIGS. 10-12  in particular, the filter bracket  499  is configured to position the hydraulic filter  498  at least partly behind and below the operator station  455  when the support panel  482  is installed to form a sidewall  447  of the cab  450  (and the operator station  455 ). In some configurations, the operator station  455  can include an operator seat  458  (illustrated schematically in  FIG. 10 ), and the hydraulic filter  498  may be positioned below the seat  458 . More particularly, in some embodiments, the hydraulic filter  498  may be supported by the support panel  482  to be disposed on an opposite side the body panel  431   b , which forms the seat portion, from the operator station  455 . Accordingly, for example, the filter  498  may be disposed to be shielded from the operator station  455  while still being relatively easily accessible for replacement or other maintenance, even after the support panel  482  has been installed. Generally, the filter  498  is configured to remove impurities from hydraulic oil and it may accordingly need to be replaced or serviced over time. Thus, improved accessibility for a hydraulic filter, such as may be provided by the described configuration of a support panel and a hydraulic sub-assembly generally, may provide substantial benefits. 
     In embodiments in which a power machine does not include a cab, a support panel of a hydraulic sub-assembly according to the disclosure can form other structural parts of the power machine. For example, a support panel that is similar to the support panel  482  may define at least a portion of a sidewall of a housing of an operator station or other structure of a power machine without a cab, including by serving a substantial structural component thereof. 
     As also noted above, some embodiments can include (or facilitate) improved manufacturing methods for power machines, including due to the inclusion of multiple hydraulic components in a hydraulic sub-assembly that can be installed as a whole on a frame of a power machine.  FIG. 13  shows an example method  500  of manufacturing a power machine with an operator station and a frame, according to embodiments of the disclosure. In some implementations, the method can include assembling  502  a hydraulic sub-assembly that includes a support panel. The support panel can be a single-piece (e.g., integral) component, such as the panel  482  shown in  FIGS. 7-10 , and can be formed through any practicable manufacturing and assembly process. 
     Assembling  502  the hydraulic sub-assembly can also include securing a plurality of components to the support panel. Generally, as described in the examples above, a variety of hydraulic and other components can be secured to the support panel, to form a unified assembly. The components can include, for example, one or more of: a control valve (e.g., the control valve  486 ); an operator input device (e.g., the operator input device  488 ), including an operator device that is configured for hydraulic control of work functions via hydraulic communication with the control valve; a pilot valve (e.g., the pilot valve  490 ) that is installed in hydraulic communication with a control valve for hydraulic control of the work functions; hydraulic conduits, such as flexible hoses and rigid tube lines; a hydraulic cooler (e.g., the cooler  496 , as secured with the lateral offset from the support panel); a hydraulic filter (e.g., the filter  498 ); and any number of other components. 
     In some cases, certain components can be secured to the support panel on opposite sides from each other. For example, a hydraulic filter can be secured to an opposite lateral side of a support panel from a control valve, an operator input device, a pilot valve, a hydraulic cooler, and a variety of hydraulic conduits. As another example, a hydraulic cooler can be secured to an opposite front or back portion of a support panel from a pilot valve or a hydraulic filter. 
     Once assembled  502 , the hydraulic sub-assembly can be secured  504  to the power machine to define a portion of a sidewall of a cab or an operator station. In some embodiments, the hydraulic sub-assembly can be secured  504  to the power machine with one or more of the attached components, such as a control valve, an operator input device, a pilot valve, a cooler bracket, or a hydraulic cooler positioned on an opposite side of the support panel from an operator station. In some embodiments, the hydraulic sub-assembly can be secured  504  to the power machine with a hydraulic filter positioned at least partly behind or beneath the operator station. In some embodiments, including as described above relative to the power machine  400 , the hydraulic sub-assembly can be secured  504  to a power machine to provide a structural portion of the power machine, including a structural portion (e.g., structural side wall) of a cab or of an operator station. 
     The embodiments provided herein can provide several advantages. For example, use of a hydraulic sub-assembly as described herein can reduce the time required to complete a production build of a loader or other power machine, as well as improve quality assurance, and potentially reduce the required labor and overhead for manufacturing. In addition, appropriate placement of components on a support panel can help to improve operability of a power machine and operator experience generally. For example, appropriate placement of hydraulic devices on a support panel can help to reduce the required length of hydraulic conduits for relevant hydraulic circuits (e.g., work actuator circuits). This can be useful, for example, to further reduce costs and minimize potential faults (e.g., leaks) within the hydraulic circuits. Similarly, filters, coolers, or other components can be readily arranged to be easily installed as part of a larger hydraulic sub-assembly, while being appropriately located and shielded relative to operator stations or other parts of a power machine and also remaining appropriately accessible for maintenance and efficient operation. In some embodiments, a hydraulic sub-assembly can also define a portion of an operator station of the power machine, such as by forming at least a portion of a wall of a cab that contains the operator station. In this regard, and in particular when a support panel of the hydraulic sub-assembly forms a structural portion of a cab, the amount of material needed for the remaining body panels or other parts of the cab may be reduced substantially, thereby potentially reducing the material cost and weight of the power machine as well as total manufacturing time. 
     Although the present invention has been described with reference to preferred embodiments, workers skilled in the art will recognize that changes may be made in form and detail to the disclosed embodiments without departing from the spirit and scope of the concepts discussed herein.