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CS25/28 User Manual ◄ 13
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.
1. 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 ttings or quick disconnects. It is a good
practice to connect return hoses rst and discon-
nect them last to minimize or avoid trapped pressure
within the tool.
3. Observe the arrow on the couplers to ensure that
the ow is in the proper direction. The female cou-
pler on the tool is the inlet (pressure) coupler.
4. Move the hydraulic circuit control valve to the ON
position to operate the tool.
NOTE:
If uncoupled hoses are left in the sun, pressure in-
crease inside the hoses can make them difcult to
connect. If possible, connect the free ends of the
hoses together.
PRE-OPERATION PROCEDURES
CHECK POWER SOURCE
1. Using a calibrated owmeter and pressure gauge,
make sure the hydraulic power source develops a
ow of 4-6 gpm /15-22 lpm at 1500-2000 psi/105/140
bar for the CS25 or a 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 re-
lief 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 in-
stalled. 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 ttings and fasten-
ers 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
IMPORTANT
This tool is furnished with a on-off spool commonly
referred to as a “dual spool” which permits
adjustment 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.
SETTING FOR OPEN-CENTER (OC) OR
CLOSED-CENTER (CC) OPERATION
To set the tool for OC system operation turn the selec-
tor screw located in the top of the valve spool fully out
(counter-clockwise) until it hits the stop.
To set the tool for CC system operation turn the selector
OPERATION