Section XXII. Repair of Water Pump Assembly

*TM 9-2815-213-34

3-115. Cleaning

3-117. Repair

Refer to paragraph 2-5 for general cleaning procedures.

Refer to paragraph 27 for general repair procedures.

Clean adapter and nozzle with carburetor cleaner or

Replace all defective parts.

equivalent. Insure that nozzle screen and spray holes

3-118. Assembly

are open.

Refer to paragraph 3114 and reverse procedures.

3-116. Inspection

Refer to paragraph 2-6 for general inspect procedures.

3-119. Installation

Check glow plug operation with a vdc source of power.

Refer to paragraph 2-10.i.,

and 2-lO.j.,

and reverse

removal procedures.

Section XXII. Repair of Water Pump Assembly

g. Inspect ceramic seal seat that is bonded to the

3-120. Disassembly

impeller counterbore (vane side) for damage and

(fig. B-22).

excessive wear. Replace if seal is damaged.

a. Remove large snap ring from pump housing by

reaching through the access ports in the drive pulley,

3-123. Assembly

with a pair of snap ring pliers.

b. Using a suitable puller, pull the impeller (18)

a. Lubricate shaft outside diameter and bearings

from the drive shaft.

inside diameter with multipurpose industrial grease.

c. Press on impeller end of shaft to remove

assembly from pump body. Press out bear (11).

CAUTION

d. Remove carbon face seal (15) from pump body.

Do not use lead base sealer.

e. Press shaft through drive pulley (3) and large

b. Pack bearings with GAA.

bearing (8). Lift off spacer (9).

f. Remove snap ring (10) from groove shaft.

NOTE

One piece sealed bearing must be in-

3-121.Cleaning

stalled on the shaft and pressed in the

Clean all components in accordance with instructions

body with BLACK shield to the pulley

contained in paragraph 2-7.

end of the shaft.

3-122. Inspection

c. Install snap ring in groove of shaft. Press inner

Perform general inspection of all component accordance

bearing on shaft with shielded side out to ward impeller

with instructions contained in pa graph 2-7. Specific

end of shaft until inner race seats against snap ring.

inspection procedures follow.

d. Position shaft and bearing in bore of pump body.

a. Inspect water pump bearings. Replace those

Slide spacer over shaft seating on shoulder of shaft.

with rough or worn races.

e. Fill cavity of bore 1 to % full of GAA.

b. Inspect water pump impeller. Replace impeller

f. Place large bearing over shaft and into bore of

assembly if cracked or corroded to extent that it will

housing with shielded side out. Press bearing into its

interfere with circulation.

seat in the housing bore.

c. Replace impeller assembly if the minimum 0.001

g. Install large snap ring in bore of pump body to

inch press-fit between shaft and impeller exceeded.

secure bearings in place.

Measure impeller bore and shaft side diameter to project

h. Support shaft on impeller end and press on

this minimum allowance

pulley fixed sheave until sheave hub is tight against

d. Inspect water pump mounting parts damage.

bearing inner race.

Attach adjustable sheave to

Replace as necessary.

complete the pulley installation.

e. Examine carbon seal carefully to make sure it is

i. Turn water pump body assembly over and press

not cracked or chipped. Replace if necessary

in a new carbon face seal using a suitable mandrel and

f. Inspect silicone oil seal. Replace if damaged

pressing arbor.

3-53