2-67. HIGH PRESSURE PUMP ASSEMBLY. This task covers:
Tools. see TM 10-4610-232-12, Appx B,
Sec II, Ref Code (No.):
Tool Kit, General Mechanics Automotive (1)
Lifting Device (5 Ton)
Personnel Required: 3
Glycerin (Appx B, Sec II, Item 16)
Banding and Clamps (TM 10-4610-232-24P)
Gaskets (TM 10-4610-232-24P)
Lockwashers (TM 10-4610-232-24P)
Washers (TM 10-4610-232-24P)
Water hoses drained.
High pressure air hoses vented.
General Safety Instructions:
Observe specific Warnings in the text
Water hoses are under high pressure. Ensure water hoses are drained before
starting work: otherwise serious injury or death could result.
Do not work on air regulator or relief valve until air pressure in manifold is fully
vented. Pressures in system can result in serious injury or death.
a. Disconnect low pressure hose (1, Figure 2-74, sheet 1) from low pressure pipe (2) by removing nuts (3), capscrews
(4), clamps (5) and gasket (6).
b. Remove capscrew (7), washer (8), lockwasher (9), nut (10), washers (11), cushion (12), and remove hose (1) from
c. Remove capscrew (14), washer (15), lockwasher (16), plate (17) from spring nut (18) in channel.
d. Disconnect high pressure hose (19) from high pressure pipe (20) by removing nuts (21), capscrews (22), clamps
(23) and gasket (24).
e. Disconnect other end of low pressure hose (1) from low pressure pipe (25) by removing nuts (26), capscrews (27),
clamps (28) and gasket (29).
e.1 Remove screw (25A), nut (25B), clamp (25C) and clamp (25D).
f. Disconnect other end of high pressure hose (19) from high pressure pipe (30) by removing nuts (31), capscrews
(32). clamps (33) and gasket (34).
g. Disconnect air hose (35) from air relief valve (41).
h. Remove air hose (35) from clamps (36) by removing nut (37), capscrews (38), two washers (39) and lockwashers
Ensure electrical power is disconnected before working on unit. Failure to do so may
result in serious injury.
i. Disconnect three power cables (42, 43 and 44) from junction box (45).
j. Loosen nuts (46) on grounding lugs (47) and remove grounding cable (48).