13
SETTING FOR OPEN-CENTER (OC) OR
CLOSED-CENTER (CC) OPERATION
To set the tool for OC system operation turn the selector
screw located in the top of the valve spool fully out (coun-
ter-clockwise) until it hits the stop.
To set the tool for CC system operation turn the selector
screw located in the top of the valve spool fully in (clock-
wise) until it bottoms.
TO DISABLE DUAL SPOOL OPERATION
AND CONVERT TO OC ONLY OPERATION
Turn the selector screw located in the top of the valve spool
fully out (counter-clockwise) until it hits the stop.
2. Insert the small plug from the kit (furnished with the tool)
into the hole located in the top of the selector screw. Tap
the plug down using a small punch and hammer. DO NOT
USE ANY ADHESIVES.
TO DISABLE DUAL SPOOL OPERATION
AND CONVERT TO CC ONLY OPERATION
1. Turn the selector screw located in the top of the valve
spool fully in (clockwise) until it bottoms.
2. Insert the small plug from the kit (furnished with the tool)
into the hole located in the top of the selector screw. Tap
the plug down using a small punch and hammer. DO NOT
USE ANY ADHESIVES.
CONNECTING HOSES
1. Wipe all hose couplers with a clean lint-free cloth before
making connections.
2. Connect the hoses from the hydraulic power source to
the tool fi ttings or quick disconnects. It is a good practice
to connect return hoses fi rst and disconnect them last to
minimize or avoid trapped pressure within the tool.
3. Observe the arrow on the couplers to ensure that the
fl ow is in the proper direction. The female coupler on the
tool is the inlet (pressure) coupler.
4. Move the hydraulic circuit control valve to the ON posi-
tion to operate the tool.
Note:
If uncoupled hoses are left in the sun, pressure in-
crease inside the hoses can make them diffi cult to
connect. If possible, connect the free ends of the hoses
together.
OPERATION
PREOPERATION PROCEDURES
CHECK POWER SOURCE
1. Using a calibrated fl owmeter and pressure gauge, make
sure the hydraulic power source develops a fl ow of 4-6 gpm
/15-22 lpm at 1500-2000 psi/105/140 bar for the CS25 or a
fl ow of 7-9 gpm/26-34 lpm at 1000-2000 psi/70-140 bar for
the CS28.
2. Make sure the power source is equipped with a relief
valve set to open at 2100-2250 psi/145-155 bar.
3. Check that the dual spool valve is set to the hydrau-
lic system type (open-center (CC) or closed-center (CC)
operation).
CHECK TOOL
1. Make sure all tool accessories are correctly installed.
Failure to install tool accessories properly can result in
damage to the tool or personal injury.
2. There should be no signs of leaks.
3. The tool should be clean, with all fi ttings and fasteners
tight.
CHECK TRIGGER MECHANISM
1. Check that the trigger operates smoothly and is free to
travel between the "ON" and "OFF" positions.
SETTING THE DUAL SPOOL FOR OPERATION
This tool is furnished with a on-off spool commonly
referred to as a "dual spool" which permits adjust-
ment so the tool may be operated on either a open-
center hydraulic system or a closed-center hydraulic
system. The dual spool is normally set to the open-
center (OC) position at time of manufacture. The
dual spool can also be disabled so that the tool may
be set to open-center only operation or closed-center
only operation. For more details, please refer to the
following instructions.
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