TM 10-4610-310-14
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SERVICING VALVES - continued
6. Examine seat O-rings (34) for cuts or wear. Replace as needed.
7. Place seat O-ring (34) on lip of spring retainer (40).
8. Carefully square seat O-ring (34) in each inlet valve chamber to avoid cutting when seat (36) is installed.
9. Examine seats (36) for grooves, pitting, or wear. Replace as needed.
10. Install seats (36) with concave side down in each inlet valve chamber. Make sure O-ring (34) fits snugly in
groove in seat (36).
11. Examine both inner (31) and outer (34) O-rings on the inlet valve adapter (32) for cuts and wear. Replace as
needed.
12. Lubricate O-rings with Glycerin. Insert into grooves on outside of each inlet valve adapter (32).
13. Carefully press inlet valve adapter (32) with small diameter down into each lower valve chamber until inlet
valve adapter snaps tightly into place.
14. Slide discharge manifold (41) over ceramic plunger (22) ends. Align exposed discharge valve adapters (35)
with inlet valve chambers in inlet manifold (27).
15. Tap discharge manifold (41) with rubber or leather mallet until inlet (27) and discharge (41) manifolds are
flush.
16. Place six lock washers (43) on two screws (44) and four screws (45).
17. Apply anti-seize compound to screw threads.
18. Install two screws (44) and four screws (45) through discharge manifold (41) into inlet manifold (27). Tighten
hand tight.
19. Torque six screws 12 foot-pounds (16.3 N m) in cross pattern sequence.
SERVICING SEALS
Disassembly
It is necessary to remove both the discharge manifold (41) and inlet manifold (27) from the pump crankcase (16)
to service the seals.
1. Remove two screws (44), four screws (45), and six lock washers (43) from the discharge manifold (41).
2. Support the discharge manifold (41) from the underside. Tap the backside of the discharge manifold with a
rubber or leather mallet to gradually separate from the inlet manifold (27).
3. Carefully place discharge manifold (41) on work surface with the crankcase (16) up.
4. Remove four screws (28) from inlet manifold (27) and pump crankcase (16).
5. Rotate crankshaft (7) to loosen inlet manifold (27).
6. Support inlet manifold (27) from the underside. Tap the backside of the inlet manifold with a leather or rubber
mallet to separate inlet manifold (27) from the pump crankcase (16).
7. Place inlet manifold (27) on a suitable work surface with crankcase (16) side down.
CAUTION
Exercise caution as the screwdriver may damage sealing surface in inlet manifold.
8. Remove Hi-Pressure Seal (HPS) (29) from each seal chamber in inlet manifold (27).
9. Invert inlet manifold (27) with crankcase (16) side up.
10. Remove Lo-Pressure Seal (LPS) (26) from each seal chamber in inlet manifold (27).
