Specifications

SERVICING INLET VALVE

Refer to Fig. 18 & 30

1. Using a lightweight hammer, loosen then screw the suction nut (187-

084) off of the cylinder (187-095). See Fig. 21

2. Remove the inlet seat (187-036), O-ring (106-008), inlet

ball (187-092) and inlet retainer (187-075) with O-ring (106-013).

See Fig. 18

3. Clean all parts and inspect them for wear or damage,

replacing parts as needed. Old O-rings should be replaced

with new ones.

NOTE: Inlet seat (187-036) is reversible.

4. Clean inside of cylinder (187-095).

5. Reassemble the valve and screw it onto the uid body if

no further service is needed.

SERVICING OUTLET VALVE

Refer to Fig. 19 & 30

1. Complete all steps of the Fluid Pump Disconnect procedure on page

16.

2. Screw the suction nut (187-084) off the pump and remove inlet valve

assembly.

3. Using the rod collar tool, loosen the packing nut and push the piston

down and out of the uid body.

4. Place piston holder (187-248) in a vise. Slide the piston

into the holder and lock in place with a 1/4" pin (187-250).

5. Clean all parts and inspect them carefully for wear or

damage. Inspect the outside of the piston rod for scoring or

wear. Replace these parts if needed. A worn piston rod will

cause premature wear of packings.

6. Using a 3/8" allen wrench to unscrew the retainer (187-051) from the

piston extension (187-314).

7. Remove the outlet seat (187-061), O-ring (106-021), outlet ball

(115-022) and outlet retainer (187-062).

8. Inspect the outlet ball and seat for wear. Replace as required.

NOTE: Outlet seat (187-061) is reversible.

9. Install parts back into piston rod as per Fig. 19. Place

two drops of loctite No. 242 (blue) on threads of the

retainer before assembling and torque to 20 ft-lbs.

SERVICING INLET & OUTLET VALVES

FIG. 18

FIG. 19

Part No. Table for Figures 18

thru 21 is located on page 20.

187-248

187-250