Greenlee / A Textron Company 84455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
1725 Hydraulic Foot Pump
Replacing theValve Pin
1. Remove the end cap (35) and pour out the oil.
2. Clamp the pump block (25) into a vise, with the end
cap (35) upward.
3. Unscrew the reservoir tube (33).
4. Loosen the jam nut (31) and remove the valve screw
(32), safety valve compression spring (30), and the
valve pin (29).
5. Install a new valve pin; install the compression
spring, valve screw, and jam nut.
6. Screw the reservoir tube back onto the pump block.
7. Connect the pump to a pressure gauge capable of
measuring 10,000 psi.
8. Fill the reservoir to 2-3/4" from the top with fresh
hydraulic fluid.
9. Pump the lever until the pump achieves pressure
relief; take note of the relief pressure.
Note: The correct relief pressure is 6000–6500 psi.
If the pump pressure does not relieve between 6000
and 6500 psi, see steps 6–10 under Setting the
Relief Pressure.
Setting the Relief Pressure
1. Connect the pump to a pressure gauge capable of
measuring 10,000 psi.
2. Clamp the pump block (25) into a vise, with the end
cap (35) upward.
3. Remove the end cap (35).
4. Pump the lever until the pump achieves pressure
relief; take note of the relief pressure.
Note: The correct relief pressure is 6000–6500 psi.
5. Loosen the jam nut (31) by using a 5/8" socket
wrench with an extension.
6. Turn the valve screw (32) clockwise to decrease the
relief setting or counterclockwise to increase the
relief setting.
7. Repeat steps 4–7 until the relief setting is at the
correct pressure.
8. Tighten the jam nut (31).
9. Replace the end cap (35).
Repairing an Intake Leak
1. Follow steps 1–3 under Replacing the Valve Pin.
2. Remove the intake valve seat plug (27), 3/16" ball
(19), and the intake check compression spring (26).
3.
Polish the plug (27) and the seat to remove any nicks
or scratches. If necessary, replace the plug (27) and
refinish the seat (see Refinishing the Ball Seats).
Note: Screw must be flush to pump block when
installed.
4. Clean the pump, reassemble, fill with fresh hydraulic
fluid, and test.
Detecting and Repairing
a Discharge Leak
To determine whether the pump has a discharge leak,
you must remove the compression spring (8) under the
high-pressure plunger (7); follow steps 1–4 below.
1. Remove the lever latch pin (6). Drive out the fulcrum
pin (4) and pivot plunger drive lock pin (4).
2.
Remove the lever (1) and the compression spring (8).
3. Reassemble the lever and pins (4) without the
compression spring (8) in place.
4. Press the lever (1) down. If the lever rises, the pump
has a discharge leak; follow steps 5–8. Otherwise,
follow step 5 only.
5. Remove the lever, then reassemble the pump with
the compression spring (8).
6. Remove the set screw (20), discharge check com-
pression spring (18), and the 3/16" ball (19).
7.
Polish the seat. Install a new ball (19) and spring (18).
8. Clean the pump, reassemble, fill with fresh hydraulic
fluid, and test.
