Greenlee / A Textron Company
7
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
1725 Hydraulic Foot Pump
Troubleshooting
Before performing any troubleshooting or repairs: (1) check the level of the hydraulic fluid, and add fluid if it is more
than 2-3/4" from the top, and (2) connect a pressure gauge to the pump to determine maximum relief pressure.
Problem
Probable Cause
Possible Remedy
Oil leak near release plunger (17). Worn or damaged O-ring.
Replace O-ring (16).
Oil leak near the plunger (7).
Worn or damaged O-ring or backup ring.
Replace O-ring (11) or backup ring (10).
Oil leak where the pump block
Worn or damaged O-ring.
Replace O-ring (28).
(25) meets the reservoir tube (33).
Oil leak at end cap (35).
Worn or damaged O-ring.
Replace end plug (34).
Lever feels “spongy.”
Air in hydraulic system.
See instructions under Purging Air
from the System.
Worn intake valve seat plug.
See Repairing an Intake Leak.
Pump will not build pressure.
Grit or other foreign matter in hydraulic
Disassemble pump. Clean all parts
system will not allow proper seating of
thoroughly with solvent. Reassemble
balls and plunger.
and fill with fresh hydraulic fluid.
Pump pressure does not relieve
Worn or damaged valve pin.
See Replacing the Valve Pin.
between 6000 and 6500 psi.
Valve not set correctly.
See Setting the Relief Pressure.
To fully retract the 746 ram
The pump has an intake leak.
See Repairing an Intake Leak.
requires more than 40 stokes.
Pump will build pressure, but
Worn or damaged ball (19), compression
Replace ball (19) and compression
pressure does not hold. (Check
spring (18)
spring (18).
this with a gauge capable of
measuring 10,000 psi. Pump the
pressure up to 6000 psi; the
Worn or scratched ball seat.
See Refinishing the Ball Seats.
pressure may immediately drop
by 500 psi, but should then hold.
If the pressure does not hold at
this point, go to the Probable
Causes).