TM-9-2320-272-24-4

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

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

JUNE 1998

TM-9-2320-272-24-4 - Page 264 of 836

TM 9-2320-272-24-4

5-36. FUEL INJECTION PUMP MAINTENANCE (Contd)

i. Camshaft Installation

1.

2.

3.

4.

5.

6.

7.

8.

9.

Position fuel pump housing (1) bottom side up in vise.

NOTE

Perform step 2 if roller bearing was removed.

Press roller bearing (8) on end plate (3).

Install new O-ring (6) and oil seal (7) on end plate (3).

Position new gasket (2) and end plate (3) on fuel pump housing (1). Ensure oil return holes are

located at top of fuel pump housing (1).

Install end plate (3) on fuel pump housing (1) with four new lockwashers (4) and screws (5).

If bearing (16) was removed, press bearing (16) on camshaft (10) and secure bearing (16) on

camshaft (10) with new lockwasher (15) and nut (14).

Install new O-ring (9) on fuel pump housing (1).

CAUTION

When installing camshaft into fuel pump housing, tap only on

camshaft outer nut. Failure to do so may result in damage to fuel

pump.

Insert camshaft (10) and bearing shell (13) into fuel pump housing (1) through governor end of fuel

pump housing (1).

Install bearing shell (13) on fuel pump housing (1) with two new seal rings (12) and screws (11).

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