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Symptom
Fluid leak at air
gap between
motor and valve
housing.
continued
Fluid leaks at flow
control valve.
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
Motor O-rings worn.
Motor cap / main housing
damaged.
Damaged O-rings.
Wrong hydraulic fluid.
Circuit to hot.
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 going through tool. Adjust flow for 13.2 gpm / 50 lpm
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
See your authorized dealer for
repair.
See your authorized dealer for
repair.
See your authorized dealer for
repair.
See OPERATING INSTRUCTIONS
for correct fluid / circuit
specifications.
Correct hose connections.
Use tools to match circuit.
Adjust relief valve to 2100-22500
psi / 145-155 bar.
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 60 psi /
4 bar.
13
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