Greenlee WW 980 Manuel D'instructions page 13

Troubleshooting—Hydraulic Pump (cont'd)
Ram will not retract.
Greenlee Tools, Inc.
The manual control valve is not in
correct position.
The manual control valve needs to
be adjusted.
Quick-couplers are not fully
threaded together.
Manual control valve set
incorrectly.
The pilot-operated valve will not
open, will not open fully, or opens
too slowly.
Hydraulic cylinder of the accessory
has failed.
980 Hydraulic Power Pump
Rotate the manual control valve to AUTO
RELEASE position.
Adjust the handle. See Manual Release/Automatic
Release Valve Handle Setting, Figure A3 in the
Repairs section of this manual.
Disconnect the hydraulic hoses and clean the
couplings. Hand-tighten couplings firmly until all
threads are engaged. Do not use a wrench.
See Hydraulic Schematic (8) and refer to Figures
A2 and A3 in the Repairs section of this manual.
See Troubleshooting—Pilot-Operated Valve at the
end of this troubleshooting section.
Troubleshoot the accessory that is
connected to the pump.
13
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070