CHAPTER 2 REPAIR AND FINAL TESTING

CHAPTER 2

REPAIR AND FINAL TESTING

(3) Remove the ac motor mounting bolts (17,

Tools, Test Equipment, Shop Equipment,

fig. 2) and remove the V-belt (25).

and Repair Parts

(4) Remove the ac motor (16).

(5) Loosen the pulley setscrew (35) and

a. Tools and Test Equipment.

remove the ac motor pulley (27).

(1) Wrench TL-111.

(2) Wrench, pipe, 14-inch.

b. Replacement.

(3) Screwdriver TL-358/U.

(4) Pliers, slip joint, 10-inch.

(1) To replace the ac motor, reverse the

(5) Multimeter AN/URM-105 or equivalent.

procedures described in a(2) through (5)

above.

b. Shop Equipment. In addition to the tools listed

(2) Align the ac motor pulley (27, fig. 2) with

above, depot repair requires metal working tools and

the centrifugal pump pulley (28) and

equipment (such as lathes and welding equipment).

tighten the V-belt (25) by sliding the ac

c. Repair Parts. The repair parts available for field

motor (16) away from the centrifugal pump

and depot maintenance are listed in TM 11-4940-204-

(18) before final tightening of the ac motor

15P.

mounting bolts (17, fig. 2).

(3) Insert the ac power cable plug (26) into the

General Repair Techniques

power source receptacle.

To repair the degreaser (fig. 2), proceed as follows:

Repair of Centrifugal Pump

a. Disconnect ac power from the degreaser before

beginning any repairs.

a. Removal (fig. 2).

b. Remove the cabinet cover and thoroughly

steam-clean the interior before attempting any welding

(1) Operate the electrical switch timer to the 0

operations.

position and pull the ac power cable plug

c. Refer to paragraphs 7 through 11 for repair

(26) from the power source receptacle.

procedures.

(2) Disconnect the intake union (20) and

d. When all repairs are completed, lubricate the

outlet union (21).

degreaser as described in TM 11-4940-204-12.

(3) Remove the intake nipple (32) and outlet

nipple (33) from the centrifugal pump (18).

Removal and Replacement of Ac Motor

(4) Remove the centrifugal pump mounting

bolts (19) and slip the V-belt (25) off the

Except for replacing a defective power cable, no attempt

pulleys.

should be made to repair a defective ac motor. If the ac

(5) Remove the centrifugal pump (18).

motor overheats, loses power, and gives off odors of

(6) Loosen the pulley setscrew (29) and

burned insulation, replace the ac motor.

remove the centrifugal pump pulley (28).

a. Removal.

b. Disassembly (fig. 3).

(1) Operate the electrical switch timer to 0

(1) Remove the casing capscrews (4), the

position and pull the ac power cable plug

casing (1), and the casing gasket (6).

(26, fig.

2) from the power source

Note:

receptacle.

The casing gasket must be kept

moist while it is out of the pump.

(2) Disconnect the power supply cable wires

from the ac motor; note the ac motor

terminal from which each wire was

removed (fig. 1).