TM 9-2330-275-14&P
4-82. HYDRAULIC PUMP REPAIR (M840).
This Task Covers:
a. Disassembly
c. Assembly
b. Cleaning and Inspection
d. Adjustment
Initial Setup:
Equipment Conditions:
Materials/Parts:
Hydraulic pump removed (para 4-81).
Hydraulic fluid (Item 6, Appendix E)
Rags (item 11, Appendix E)
Tools/Test Equipment:
Dry cleaning fluid (Item 14, Appendix E)
One Iockwasher
GeneraI mechanic’s tool kit
One repair kit
Common no. 1 shop set
One spring pin
Hydraulic pressure gage
Three packings
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Remove two retaining rings (5), grooved pin (6), and beam (4) from top of hydraulic pump.
Remove spring pin (7) from beam (4). Discard spring pin.
If damaged or worn, remove pin (8) from beam (4). Discard pin.
Remove piston (1) and gasket (9). Discard piston and gasket.
if damaged, remove two screws (14) and plate (13) from cover (15).
Remove six bolts (2), cover (15), and gasket (16) from pump housing (27). Remove dipstick (3). Discard gasket.
Remove piston retaining nut (10), packing (11), and packing retainer (12) from cover (15). Discard packing and
packing retainer.
Remove Cylinder (38) from pump housing (27).
NOTE
Not. position of steel balls for assembly.
Remove valve adjusting screw (22), packing (23), spring (24), ball bearing (25), and ball (26). Discard packing,
spring, ball bearing, and ball.
Remove screw (29), Iockwasher (30), and lever (31) from release valve (32). Discard Iockwasher.
Remove valve spindle assembly (33), insert (34), and time packings (35) from pump housing (27). Discard
packings.
Remove pin (28) and release valve (32) from valve spindle assembly (33).
Remove relief valve (20) and packing (21) from pump housing (27). Discard packing.
Remove valve adjusting plug (17), spring (18), and ball bearing (19) from relief valve (20).
Remove pipe plug (37) and screen (36) from pump housing (27).
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