A power machine having a frame, a boom pivotally coupled to the frame, a lift cylinder coupled between the frame and the boom to raise and lower the boom, a slave cylinder coupled between the frame and the boom to aid the lift cylinder in raising the boom, an implement interface to which an implement can be mounted, a tilt cylinder coupled between the boom and the implement interface to control rotation of the implement interface and implement relative to the boom, a power source configured to provide pressurized hydraulic fluid, and a control system (360; 400) configured to control provision of the pressurized hydraulic fluid from the power source to the lift cylinder, the slave cylinder and the tilt cylinder, the control system including a lift control valve coupling the power source to the lift cylinder and having a non-actuated position and first and second actuated positions (407, 408) for extending and retracting the lift cylinder, a tilt control valve having a non-actuated position and first and second actuated positions (425, 426) for extending and retracting the tilt cylinder; a lift load holding valve coupled between the lift control valve and the lift cylinder; characterised in that it further comprises a pressure reducing valve coupled between the lift load holding valve and the slave cylinder; wherein the control system (360; 400) is configured such that when the tilt control valve is in the non-actuated position and the lift control valve is in the first actuated position to extend the lift cylinder, pressurized hydraulic fluid is provided through the lift control valve and through the pressure reducing valve to the slave cylinder to extend the slave cylinder and aid the lift cylinder in raising the boom; and the control system (360; 400) further including a tilt load holding valve coupled between the tilt control valve and the tilt cylinder, a slave load holding valve coupled between the slave cylinder and the tilt cylinder, wherein the control system being further configured such that when the tilt control valve is in the non-actuated position and the lift control valve is in the first actuated position to extend the lift cylinder, pressurized hydraulic fluid is provided through the lift control valve and through the pressure reducing valve to the slave cylinder to extend the slave cylinder and aid the lift cylinder in raising the boom, and such that extension of the slave cylinder causes the tilt load holding valve and the slave load holding valve to open and communication increases in pressure in the tilt cylinder, resulting fro a load carried by the implement, to be communicated to the slave cylinder to further aid the lift cylinder in raising the boom. a lift control valve coupling the power source to the lift cylinder and having a non-actuated position and first and second actuated positions (407, 408) for extending and retracting the lift cylinder, a tilt control valve having a non-actuated position and first and second actuated positions (425, 426) for extending and retracting the tilt cylinder; a lift load holding valve coupled between the lift control valve and the lift cylinder; a tilt load holding valve coupled between the tilt control valve and the tilt cylinder, a slave load holding valve coupled between the slave cylinder and the tilt cylinder,