Hydraulic Equipment
Catalogue
Please note before using this catalogue:
This catalogue was planned and edited in such manner it can be used in the planning of hydraulic system, for productrecommendation, and as technical material for those who usually handle oil hydraulic equipment.

The specifications and characteristics listed in the catalogue are typical performance under certain conditions and are

not guaranteed to work under all conditions. Please select products based on the assumption that there will be somefluctuations due to errors in each product.

Product description
The principal details described for each model include the following.
■Specifications■Accessories■Model Number Designation■Outer dimensional drawing■Instructions■Performance characteristics■Interchangeability between current and new products■List of seals■Others

About a unit
Unit in this catalogue is shown with SI unit only. Pressure in this catalogue is shown at “gauge pressure”.

About graphic symbols
The graphical symbols used to indicate the functions of hydraulic and pneumatic equipment and devices are specified
in JIS B 0125-1. JIS B 0125-1 was revised in November 2007, and the graphical symbols of the former JIS are used inthis catalogue. A table comparing the graphical symbols in this catalogue with those in JIS B0125-1:2007 is shown at
the end of this catalogue for reference.

About the change of the design number
The design numbers are subject to change.

But the last digit of the design number is changed, the installation dimensions and performance characteristics willremain the same.

Please be sure to confirm the design number when ordering.

Safety Precautions
To prevent serious accidents, equipment damage, and otherproperty damage, please observe the following precautions and"Instructions" in this catalogue, as well as all related regulations
regarding safety.
Before using the product, be sure you read and understand all
the instructions in the Operator's Manual entirely.
In this catalogue, safety precautions are classified into threeranks.

DANGER

Indicates an imminent danger that is very
likely to cause death or severe injury unlessthe situation is avoided.

WARNING

Indicates a potential danger that may cause
death or severe injury unless the situation isavoided.

CAUTION

Indicates a potential danger that may cause
a minor or moderate injury or that may resultin property damage.

4. Precautions for Operation
DANGER Never operate any device in an environment where
there is danger of explosion or fire, unless the device
is fully protected. This may lead to major and serious
accidents including explosion or fire.

WARNING Always provide protective covers for rotating shafts ofpumps, motors, etc. Do not approach near the pumps
or motors in operation. There is a fear of injury bysuch an accident that the hands or clothes are caught
by or coiled into the pumps and the motors.

WARNING In event of abnormal operation (unusual sounds, oilleakage, smoke, etc.), immediately stop operationand take appropriate corrective measures. Continued
operation may result in damage, fire, injury, or otheraccidents.

WARNING Completely discharge air from the cylinder at low
pressure. Failure to do so may result in unexpectedmovement of the cylinder, which in turn may cause
injury.

WARNING Do not loosen the air vent valve more than thespecified lift during the air bleeding operation. Doingso may result in a serious accident due to valve
ejecting or oil spurting out.

1. Precautions for Use
CAUTION To avoid possible injury when handling the products,

wear protective safety equipment in accordance withthe instructions in the Operator's Manual.

WARNING [Cylinders with Cushion]

When adjusting the cushion, do not loosen the cushion
adjustment valve more than the specified lift. Doing somay cause valve to protrude or oil to spray out, which
could result in a serious accident.

CAUTION Failure to support the weight of the product or lifting

the product with improper posture may result ininjury to the hands or back. Be sure to follow theinstructions in the Operator's Manual.

CAUTION Do not climb on, strike, drop or exert unnecessary

CAUTION To adjust the cushion, gradually increase the cylinder

speed from a low speed [50 mm/s or less]. Rapidly
accelerating the cylinder may produce abnormal
surge pressure, resulting in damage to the cylinder orthe machinery and consequently leading to a serious
accident.

force on the product. This may lead to injury or fire
due to improper operation, damage, or oil leakage.

CAUTION Oil on the product or floor must be cleaned up
thoroughly. Oil could cause you to drop the productor slip on the floor.

2. Precautions for Installation, Removal, and Maintenance
WARNING All installation, removal, seal replacement, piping
or wiring should be performed by properly trained
personnel.

WARNING Before starting the work for installation, removal,maintenance, piping and wiring, do the following
jobs. Failure to do these jobs may cause theequipment to move suddenly or spout the oil fromit during the work, which eventually may cause theserious accidents.
● Shut off the power supply to the equipment andmake sure that all the electrical motors or engines
have stopped.
● Fix the Cylinder rod not move/move down when
installing/removing the Cylinder.
● Get the pressure in the pipes and cylinders in thehydraulic system back to zero pressure.

WARNING Before working on any electrical wiring, be sure to
shut off the power supply. Failure to do this may
cause electrical shock.

CAUTION Keep all installation holes and surfaces clean. Failure
to do this may cause insufficient tightening of thebolts that may cause fire due to oil leakage.

CAUTION Before installing the product, be sure that all

specified bolts are tightened with the specified torque.
Tightening with the outside specifications may cause
fire due to improper operation, damage, oil leakage,etc.

3. About Maximum Operating Pressure
WARNING The maximum operating pressure described in thiscatalogue includes the surge pressure. Using theproduct at the pressure higher than the maximum
operating pressure may cause damage to the product,
resulting in a serious accident.

CAUTION Before operating this device for the first time, checkthat hydraulic and electrical circuits are properlyconnected and that adjoining surfaces are tightlyaligned.

CAUTION Do not use the product out of the specification

as described in the catalogue, related data sheets,drawings, etc. Not doing so may cause improper
operation, damage or injury.

CAUTION During operation, high temperatures in the hydraulicsystem or solenoid units may occur. Wear protective
gear on hands and body when around these parts.

CAUTIONBe sure to operate the product with proper oil, andwithin established ranges for temperature, viscosityand purity. Use outside of specified limits may cause
improper operation or fire due to oil leakage.

5. Maintenance Precautions
WARNING Never convert the products. If any conversions are
made, unexpected machine movement may cause
injury.

CAUTION

Do not disassemble or change the products without
prior consent of the manufacturer. Failure to do thiswill cause the products not to perform the specified
performance and characteristics, and moreover will
become the causes of the accidents or failures.

CAUTION For transportation/storage of the product, pay

attention to environmental conditions, such as ambient
temperature and humidity, and take anti-dust/rustmeasures.

CAUTION The seals may be required to replace if the products isused after long-term storage.

Read the manual thoroughly and take due care toCAUTION replace the seals.

6. Related Regulations
CAUTION To ensure that this product is used in a safe manner, it
is essential to observe the above precautions, as well
as all related regulations regarding safety.