TM 5-4930-244-14
5-12.
HIGH PRESSURE PUMP - REPAIR.
This Task Covers:
a.
Disassembly
b.
Repair
c.
Assembly
Initial Setup:
Tools and Test Equipment Required
Tool Kit, General Mechanic's: Automotive (Appendix B, Section III, Item 1).
Materials/Parts Required
Dry cleaning solvent (Appendix H, Section II, Item 3).
Loctite Type 242 (Appendix H, Section II, Item 13).
O-Ring (Appendix H, Section II, Item 26).
O-Ring (Appendix H, Section II, Item 27).
O-Ring (Appendix H, Section II, Item 28).
O-Ring (Appendix H, Section II, Item 29).
Lockwasher (Appendix H, Section II, Item 30)
Gasket (Appendix H, Section II, Item 31).
Block "V" Packing (Appendix H, Section II, Item 32).
O-Ring (Appendix H, Section II, Item 33).
O-Ring (Appendix H, Section II, Item 34).
Packing (Appendix H, Section II, Item 35).
O-Ring (Appendix H, Section II, Item 36).
Packing (Appendix H, Section II, Item 37).
Seal (Appendix H, Section II, Item 38).
Seal (Appendix H, Section II, Item 39).
O-Ring (Appendix H, Section II, Item 40).
Gasket (Appendix H, Section II, Item 41).
Gasket (Appendix H, Section II, Item 42).
Seal (Appendix H, Section II, Item 43).
Gasket (Appendix H, Section II, Item 44).
Gasket (Appendix H, Section II, Item 45).
Seal (Appendix H, Section II, Item 46)
Oil, SAE No. 10 (Appendix H, Section II, Item 16).
Equipment Condition
Unit shut down and cool.
High Pressure Pump Removed (para. 4-42).
a.
Disassembly. (Refer to Figure 5-26.)
(1)
Loosen jam nut (54) and unscrew pump tube (55) from air motor assembly to expose upper coupler (56).
(2)
Remove upper spring clip (57) from upper coupling (56). Unthread upper coupling (56) from air motor piston rod
(27) by rotating entire pump tube assembly.
(3)
Clamp air motor in vise vertically.
(4)
Remove four hex head cap screws (1) from adapter (2) and valve body and stop assembly (3). Lift off adapters
(2) and remove o-ring (4). Discard o-ring (4).
(5)
Loosen two set screws (5) and unscrew two caps (6). Remove springs (7 and 8) and aluminum gasket (9).
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