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