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WATER PUMP REPAIR
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/.5ton/TM-9-2320-386-24-1-2 Extended Service Program (ESP) for 2-1/2-Ton 6x6 M44A3 Series Trucks (Diesel) Manual
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WATER PUMP REPAIR - continued - TM-9-2320-386-24-1-20280
TM 9-2320-386-24-1-2
0328 00
WATER PUMP REPAIR (Contd)
DISASSEMBLY
1.
Remove four screws (2), washers (1), housing cover (3), and gasket (4) from housing (7). Discard
gasket (4).
CAUTION
Use care when pressing shaft from water pump housing to
prevent damage to shaft and pulley.
2.
Position housing (7) on arbor press, with impeller (5) facing up.
3.
Remove shaft (8), with pulley (9) attached, from impeller (5), seal (6), and housing (7).
4.
Remove impeller (5) from housing (7).
5.
Remove seal (6) from housing (7). Discard seal (6).
6.
Remove shaft (8) from pulley (9).
CLEANING AND INSPECTION
.WARNING.
Volatile mineral spirits burn easily and fumes can explode. Do not
smoke or allow open flame nearby when using mineral spirits.
Failure to do so may cause serious injury or death to personnel.
1.
Clean all water pump parts with mineral spirits.
2.
Inspect housing (7) and housing cover (3) for nicks, burrs, wear or pitted surfaces, damaged threads
and elongated holes. Replace housing (7) or housing cover (3) if nicked, burred, surfaces are worn or
pitted, threads are damaged, or holes elongated.
ASSEMBLY
1.
Apply antiseize compound to mating surfaces of shaft (8), impeller (5), and pulley (9).
2.
Install shaft (8) in pulley (9) until flush.
3.
Install shaft (8) with pulley (9) into housing (7) until 4.08-4.10 in. (103.6-104.1 mm) distance is
achieved from front face of pulley (9) to face of housing (7).
4.
Using seal installer, press new seal (6) on shaft (8) and housing (7).
5.
Press impeller (5) on shaft (8) until a distance of 0.020-0.040 in. (0.51-1.02 mm) is achieved between
impeller (5) and face of housing (7).
6.
Install new gasket (4) and housing cover (3) on housing (7) with four washers (1) and screws (2).
7.
Install water pump (WP 0080 00).
0328 00-2

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