4-42. LOW AND HIGH PRESSURE PUMPS AND PUMP MUFFLERS - SERVICE/REPLACE.
This Task Covers:
Tool Kit, General Mechanic's: Automotive (Appendix B, Section III, Item 1)
Teflon Tape (Appendix E, Section II, Item 7).
Silicon Sealant (Appendix E, Section II, Item 6).
Unit shut down and cool
Air Regulator Removed (para. 4-41).
a. Removal. (Refer to Figure 4-42).
The following procedures will be the same for all pumps except as noted.
Remove pump mufflers (1) from elbows (2). Remove elbows (2) from pumps (3)
Disconnect hose assemblies (4) from elbow swivel adapters (5) Remove elbow swivel adapters (5) from pumps
Remove hose assemblies (6) from needle valves (7) and elbows (8) Remove elbows (8)
Open manhole cover (9) to gain access to attaching hardware on pumps (3).
Remove four hex head - cap screw (10), and four washers (11) and four hex, lock nuts (12), holding pumps (3)
onto lube tank (13). For high pressure pump only, loosen two set screws (14) on baffle (15). Remove baffle from
high pressure pump (3) tube.
Lift out pumps (3) and allow excess lubricant to drip into lube tank (13) wipe tube clean.
Do not let any pieces of old silicone sealant fall into the lube tank chamber.
Remove two locknuts (16) from two threaded bolts (17) on muffler (1). Discard two locknuts (16).
Remove upper cap (18), circular screen (19) and base (20) from screen (21)