TM 10-4610-310-14
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SERVICING SEALS - continued
24. Tap with a leather or rubber mallet until inlet and discharge manifolds are flush.
25. Place six lock washers (43) on two screws (44) and four screws (45).
26. Apply anti-seize compound to screw threads.
27. Install two screws (44) and four screws (45) through discharge manifold (41) into inlet manifold (27). Tighten
hand tight.
28. Torque six screws 12 foot-pounds (16.3 N m) in cross pattern sequence.
SERVICING PLUNGERS
Disassembly
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 dual end 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.
8. Remove seal retainer (25) from each plunger rod (18).
9. Loosen plunger retainers (24) approximately three to four turns.
10. Push the ceramic plunger (22) back towards crankcase (16). Separate plungers (22) from plunger retainers
(24).
11. Complete unthreading plunger retainers (24) by hand.
12. Remove plunger retainers (24) and seal washers (23).
13. Remove ceramic plungers (22), keyhole washers (21), and barrier slingers (20) from each plunger rod (18).
Assembly
1. Visually inspect three crankcase oil seals (19) for deterioration or leaks. Replace as needed.
2. Examine three plunger retainers (24), keyhole washers (21), and barrier slingers (20) for wear. Replace as
needed.
3. Examine seal washers (23) for cuts or wear. Replace as needed.
4. Examine ceramic plungers (22) for scoring, scale build-up, chips, or cracks. Replace as needed.
NOTE
Generally the ceramic plungers (22) do not need to be replaced.
5. Install seal washer (23) over each plunger retainer (24).
6. Install plunger retainer (24) with seal washer (23) into flat end of ceramic plunger (22).
CAUTION
Ceramic plunger can only be installed in one direction. Counterbore end of ceramic plunger fits
over plunger rod shoulder.
7. Install barrier slinger (20) over each plunger rod (18) with concave side away from crankcase (16).
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