Greenlee / A Textron Company 15 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
980 Hydraulic Power Pump
Troubleshooting—Hydraulic Pump (cont’d)
Ram will not retract. The manual control valve is not in Rotate the manual control valve to
correct position. AUTO RELEASE position.
The manual control valve needs to be Adjust the handle. See Manual
adjusted. Release/Automatic Release Valve
Handle Setting, Figure A3 in the
Repairs section of this manual.
Quick-couplers are not fully threaded Disconnect the hydraulic hoses and
together. clean the couplings. Reconnect the
hydraulic hoses. Hand-tighten couplings
firmly until all threads are engaged.
Do not use a wrench.
Manual control valve set incorrectly.
See Hydraulic Schematic (8) and refer
to Figures A2 and A3 in the Repairs
section of this manual.
The pilot-operated valve will not open, See “Troubleshooting—Pilot-Operated
will not open fully, or opens too slowly.
Valve” at the end of this Troubleshooting
section.
Hydraulic cylinder of the accessory Troubleshoot the accessory that is
has failed. connected to the pump.
PROBLEM PROBABLE CAUSE POSSIBLE REMEDY
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