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16 ► CO25 User Manual
TROUBLESHOOTING
If symptoms of poor performance develop, the following chart can be used as a guide to correct the problem. When diag-
nosing faults in operation of the wrench, always check that the hydraulic power source is supplying the correct hydraulic
ow and pressure to the tool as listed in the following table. Use a ow meter known to be accurate. Check the ow with
the hydraulic uid temperature at least 80
o
F/27
o
C.
PROBLEM CAUSE SOLUTION
Tool does not operate.
Hydraulic ontrol valve OFF. Turn the hydraulic system control
valve ON.
Hydraulic hoses not connected prop-
erly.
Make sure the hoses are connected
and the couplers are tight.
Hydraulic system not functioning. Check power unit for correct ow and
presssure.
Couplers or hoses blocked. Remove obstruction.
Mechanical failure. Disassemble tool and inspect for dam-
age.
Tool operates in reverse.
Hoses connected to wrong ports on
tool.
Connect input (supply) line to IN port
and connect output (return) line to
OUT port.
Oil leakage between motor housing
and ON/OFF vlave block or motor.
Oil tube o-ring failure. Replace o-ring.
Motor face seal failure. Replace seal.
Trigger difcult to operate.
Hoses connected to wrong ports on
tool.
Connect input (supply) line to IN port
and connect output (return) line to
OUT port.
Excessive back-pressure. If back pressure is greater than 250
psi/17 bar, correct the return line ob-
struction or restriction.
Saw cuts too slowly.
Wrong cut-off wheel for work material. Use correct wheel.
Insufcient oil ow. Adjust oil ow to 7-9 gpm/26-34 lpm.
Relief valve setting too low. Adjust relief valve to 2100-2250
psi/145-155 bar.