Disassembly. - TM-10-3930-631-340112

TM 10-3930-631-34

(4) Remove brush screw (fig. 8-11) and washer

housing, with attached rocker arm assembly, from motor.

and lift spring to slide brushes from brush holder.

(6) Remove nuts, washers and insulators and

remove studs from housing.

(7) Remove screws (21) and lock washers (22)

and remove rocker arm assembly from rear housing.

Press bearing (20) from rear housing.

(8) Remove pole shoe screws (40) and remove

pole shoes (41) and field winding (42) from housing.

d. Cleaning, Inspection and Repair.

(1) Refer to paragraph 8-2 d. and clean, inspect

and repair the hydraulic pump motor in the same

manner.

(2) Inspect fan for damage to blades and wear

in shaft diameter. Replace unserviceable fans.

(3) Inspect mounting brackets for bent or

damaged condition. Straighten brackets if possible.

Replace damaged brackets.

e. Assembly.

(1) Install terminal studs (36 and 38, fig. 8- 10)

in housing and torque studs to 107 pound- inches (.92

m-kg). Install nuts, washers and insulators.

(2) Install field windings (42) and pole shoes

(41) in housing and secure with pole shoe screws (40).

Figure 8-11. Hydraulic pump motor brush location.

CAUTION

Handle field windings carefully to avoid damage

(5) Refer to paragraph 8-2a. steps (4) through

to insulation.

(12) and replace brushes.

(3) Fill bearing (20) half full of grease (GAA) and

Note

press into rear housing (29). Install rocker arm assembly

In step (11) brush spring pressure should be 25

(27) on rear housing and secure with screws (21) and

ounce, (0.695 kg).

lock washers (22).

(6) Install rear cover (13, fig. 8-10) on motor.

(4) Move rear housing (29) into position and

(7) Install drip pan.

connect leads (31, 32, and 33) to rocker arms and field

b. Removal. Refer to paragraph 2-13 and

windings. Install rear housing and bracket (11) and

remove pump motor.

secure with screws (7 and 10) and lock washers (8).

c. Disassembly.

(5) Install key (18) in slot in shaft. Heat fan (17)

(1) Remove screws (6, 7, and 10, fig. 8-10) and

in oven to 200F (93C) and press fan into place over

lock washers (8) and remove brackets (9 and 11) from

key.

motor.

(6) Press bearings (15 and 20) on armature

(2) Remove front and rear covers (12 and 13)

shaft.

from motor. Refer to a. above and remove brushes.

(7) Place assembled housing (43) in a vertical

(3) Remove remaining screws and remove front

position and carefully lower armature assembly into

housing (14) from motor. Carefully remove armature

position in bearings. Install armature carefully to avoid

assembly, with attached bearings and fan, from motor

damage to commutator and field windings.

housing.

(8) Position front housing (14) and bracket (9)

CAUTION

on motor and secure with screws (6 and 7) lock washers

Use care when removing armature to prevent

(8).

damage to commutator, core and pole faces.

(9) Refer to a. above and install brushes in

Remove armature by lifting straight up out of

pump motor.

housing.

f. Installation. Refer to paragraph 2-13 and

(4) Use a suitable puller and remove bearings

install pump motor.

(15 and 20) from armature shaft. Remove fan (17) and

key (18) from shaft.

(5) Remove remaining screws and remove rear

housing (29) far enough to disconnect leads from rocker

arms and studs. Remove rear

8-8