18 ► CS11
Service Manual
If symptoms of poor performance develop, the following chart can be used as a guide to correct the problem. When
diagnosing faults in operation of the saw, always make sure the hydraulic power source is supplying the correct
hydraulic flow and pressure to the saw as listed in the table. Use a flow meter know to be accurate. Check the flow
with the hydraulic fluid temperature at least 80 °F/27 °C.
PROBLEM
CAUSE
REMEDY
Cuts slow.
Insufficient fluid flow or low relief
valve setting.
Adjust fluid flow to proper GPM. For
optimum performance adjust relief valve to
2250 psi/155 psi.
Chain dull.
Sharpen per instructions or replace.
Backpressure too high.
Should not exceed 250 psi/17 bar at 14
GPM/53 LPM measured at the end of the
tool operating hoses.
Bar turns color.
Insufficient oiler flow.
Use manual oiler during heavy cuts.
Adjust oiler per service instructions.
Tool does not run.
Power unit not functioning.
Check power unit for proper flow and
pressure (10 GPM/38 LPM at 1500 psi/104
bar minimum).
Coupler or hoses blocked.
Remove obstruction.
Mechanical failure.
Disassemble tool and inspect for damage.
Tool runs backwards.
Pressure and return reversed.
Connect for proper flow direction. Motor
shaft rotates clockwise.
On/Off trigger is hard to press.
Pressure and return reversed.
Correct for proper flow direction.
Backpressure too high.
Should not exceed 250 psi/17 bar at 14
GPM/53 LPM measured at the end of the
tool operating hoses.
Oil leakage around drive
sprocket.
Motor shaft seal failure.
Replace as required. Make sure that oil
present is not the result of excess oiler
flow.
Oil leakage between rear gear
housing and valve handle
assembly.
Motor face seal failure.
Replace as required.
Chain continues to move after
valve is shut off.
Chain is too loose.
Tighten chain.
Input flow too high.
Decrease flow.
TROUBLESHOOTING