Troubleshooting - Greenlee 755 Operation, Service And Parts Instruction Manual

Troubleshooting

PROBLEM
Oil leak at coupler.
Pump builds pressure, but ram
does not advance, or ram will
not return.
Oil leak at OPEN/CLOSE
release knob.
Oil leak at plunger.
(Attached to handle.)
Oil leak at reservoir end.
Can't hold load or excessive
pumping is required.
Can't raise load with excessive
pumping but handle is rigid.
Load on system causes handle
to lift.
Greenlee Textron Inc. / Subsidiary of Textron Inc.
755 Hydraulic Hand Pump
PROBABLE CAUSE
Fitting loose or damaged.
O-ring is worn or damaged.
Coupler is not tightened sufficiently,
and check balls are not engaged.
O-ring and/or backup ring is worn
or damaged.
Release shaft is bent.
O-ring, backup ring and/or washer
are worn or damaged.
Injector packing nut is worn.
V-packing seal is worn or damaged.
Cylinder wall damaged.
Ball in release knob leaking.
Discharge ball (20) or intake ball (22)
below discharge ball (20) is leaking.
Intake ball (22) below discharge ball (20)
is leaking.
Discharge ball (20) is leaking.
Tighten or replace fitting and/or coupler.
Replace O-ring.
Hand-tighten coupler completely so
check balls engage. Replace coupler
if necessary.
Replace O-ring (18) and/or backup
ring (17).
Replace release shaft knob unit (7).
Replace O-ring (29), backup ring (15),
and washer (16).
Replace injector packing nut (6).
Replace two V-packing seals (28).
Replace reservoir tube (8).
Check seat for scratches or con-
tamination. Reseat ball or return to
an authorized Greenlee service center
for repair.
Check seat for scratches or con-
tamination. Reseat ball or return to
an authorized Greenlee service center
for repair.
Check seat for scratches or con-
tamination. Reseat ball or return to
an authorized Greenlee service center
for repair.
5 4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
POSSIBLE REMEDY