TM 5-3820-241-34
8
ME 3820-241-34/3-12
1 Hex head capscrew
7 Drive shaft key
13. Pump rotor
19 Snap ring
2 Lockwasher
8 Cover mounting screw
14 Rotor vane
20 Shaft bearing
3 Hex head capscrew
9 Pump cover
15 Ring
21 Snap ring
4 Lockwasher
10 O-ring
16 Straight pin
22 seal
5 Pump mounting bracket
11 Spring
17 O-ring
33 Pump body
6 Pump coupling
12 Pressure plate
18 Pump shaft
Figure 3-12. Hydraulic pump and drive coupling. disassembly and reassembly.
3-19. Hydraulic Pump and Drive Coupling,
Cleaning Inspection and Repair
a. Cleaning.
(1) Clean all parts except O-rings in cleaning
solvent (Fed Spec PD 680) and dry thoroughly.
(2) Discard and replace all O-rings.
b. Inspection and Repair.
(1) Inspect shaft bearing for excessive wear,
roughness or binding while rolling on shaft.
(2) Inspect rotor vanes for chips and ex-
cessive wear. If any vane is defective, replace
them all with a rotor repair kit.
(3) Inspect the rotor for cracks, scores and
rough spots. Remove minor rough spots with
emery cloth. Replace a badly worn rotor.
(4) Inspect the pump housing and covers for
cracks, nicks and burrs on machined surfaces.
Remove small nicks with a fine emery cloth.
(5) Inspect the pump shaft keyway and key
for damage or excessive wear.
(6) Inspect all hardware and threaded areas
for damage. Replace defective hardware.
(7) Repair by replacement of all defective
parts.
3-20. Hydraulic Pump and Drive Coupling,
Reassembly and Installation
a. Reassembly.
Reassemble the hydraulic
pump in the reverse of disassembly sequence as
illustrated in figure 3-12.
b. Installation.
(1) Install the hydraulic pump and drive
coupling in the reverse of numerical sequence as
illustrated in figure 3-11.
(2) Refer to LO 5-3820-241-12 and service
the hydraulic reservoir.
3-18
