Stanley GR30 User Manual page 21

Symptom
Fluid gets hot, power unit
working hard.
Grinding wheel comes to abrupt
stop after release of trigger.
* Grinding wheel should rotate CCW when viewed from the shaft end.
TROUBLESHOOTING
Possible Cause
Open-center tool on closed-center
circuit.
Too much fluid going through tool.
Circuit generating high heat with flow
controls, open relief valve, etc.
Circuit contaminants caused pump
and valve wear, and high heat
operation.
Porting spool incorrectly installed.
Mechanical failure.
Solution
Tool designed for open-center
hydraulic system.
Adjust flow for 9 GPM/34 LPM
maximum.
Use pump and rpm for producing
needed flow only.
Contact your authorized STANLEY
distributor for pump
replacement. Install large clean filter
and keep circuit fluid clean.
Contact your authorized STANLEY
distributor.
Contact your authorized STANLEY
distributor.
GR30 User Manual ◄ 21
and valve