TM-9-2320-272-24-3

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 3 OF 4

JUNE 1998

TM-9-2320-272-24-3 - Page 122 of 799

TM 9-2320-272-24-3

4-63. WATER PUMP (M939/A1) MAINTENANCE (Contd)

10.

Install new relief fitting (4) in hole of water pump body (5).

CAUTION

Water pumps are lubricated only after rebuild. The lubrication

passages are normally kept plugged to prevent overgreasing which

can cause seal blowout and damage to water pump.

NOTE

Steps 11 and 12 must be performed to prevent water pump

damage.

11.

Install grease fitting (2) in passage (1). Grease fitting (2) is installed temporarily to fill water pump

cavity with lubricant.

NOTE

Use care when lubricating water pump. Do not allow grease to

come into contact with shaft.

12.

Protecting shaft (3) from grease, fill water pump body (5) with 0.60-0.70 cu in. or 0.31-0.37 oz of

GAA grease. Remove and discard grease fitting (2).

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