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Symptom
Tool runs too fast.
Trigger operation erratic.
Control difficult.
Fluid leak at air gap between
motor and valve housing.
Fluid gets too hot. Power unit
working hard.
Gearshift knob turns hard.
No gearshift function.
Water leaking out of shaft
seal or side hole.
Possible Cause
Incorrect hydraulic flow.
Hydraulic flow reversed.
Priority valve faulty.
Trigger mechanism blocked.
Motor capscrews loose.
Motor O-rings worn.
Motor cap/main housing
damaged.
Hydraulic pressure and
return hoses reversed.
Open center tool on a closed
center circuit or vice versa.
Circuit relief set too low.
Too much fluid getting
through tool.
Circuit is generating high
heat with flow controls.
Circuit has contaminants that
have caused wear and high
heat generation.
Oil leak at motor shaft seal
into gearbox causes high
pressure in gearbox.
Shifter pin worn or broken.
Output shaft seals worn.
Water pressure too high.
Seal damaged.
TROUBLESHOOTING
Solution
Check that hydraulic power source is not
producing over 13.2 / 50 lpm at 950-2000 psi /
66-149 bar.
Correct the tool hoses, IN and OUT per
instructions and if the power supply valve is
reversible, reconnect the tool return hose to the
oil cooler or to the filter directly.
Do not separate modules. Remove inspect and
replace priority valve if necessary. See your
authorized service dealer for replacement.
Do not separate modules. Clean trigger area.
Adjust trigger.
Tighten to recommended torque (10 Nm = 7, 5
lbf.ft).
See your authorized dealer for repair.
See your authorized dealer for repair.
Correct hose connections.
Use tools to match circuit.
Adjust relief valve to 2100-22500 psi/145-155
bar.
Adjust flow to 13.2 gpm/50 lpm maximum.
Use pump size and rpm for producing needed
flow only. Eliminate circuit heating causes.
Replace worn pump and valves. Install a large
clean filter and keep the fluid clean.
See your authorized dealer for repair.
See your authorized dealer for repair.
See your authorized dealer for repair.
Maximum water pressure is 60 psi/4 bar.
CD10 User Manual ◄ 15
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