TM-9-2320-272-24-2

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

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 2 OF 4

JUNE 1998

TM-9-2320-272-24-2 - Page 777 of 991

4-8. STARTING

TM 9-2320-272-24-2

THIS TASK COVERS:

a. Priming Lubrication System (M939/A1)

b. Out-of-Chassis Run-In (M939/A1)

c. In-Chassis Run-In

INITIAL SETUP:

APPLICABLE MODELS

PERSONNEL REQUIRED

All

TWO

SPECIAL TOOLS

Priming pump (M939/A1 (Appendix E, Item 94)

Spring pack adjusting tool (M939/A1)

(Appendix E, Item 130)

TOOLS

General mechanic’s tool kit (Appendix E, Item 1)

MATERIALS/PARTS

Special seal (M939/A1) (Appendix D, Item 612)

REFERENCES (TM)

LO 9-2320-272-12

TM 9-2320-272-10

TM 9-2320-272-24P

GENERAL SAFETY INSTRUCTIONS

Engine compartment must be clear of tools and

other materials before starting engine.

CAUTION

Engine lubrication system cannot be primed through bypass filter.

1.

Remove pipe plug (3) from gearcase cover flange (1) on left side of engine (2).

2.

Connect oil priming pump to orifice (4) in gearcase cover flange (1).

3.

Prime until 30 psi (207 kPa) of pressure is obtained.

CAUTION

Do not crank engine continuously for more that 30 seconds. Wait

2-5 minutes before repeating to prevent starter motor damage.

4.

Close fuel shutoff valve and crank engine 15 seconds while maintaining 15 psi (103 kPa) pump

pressure.

5.

Disconnect oil priming pump and replace pipe plug (3) in gearcase cover flange (1). Tighten pipe

plug (3) 60-70 (81-95 N•m).

6.

Check oil level (TM 9-2320-272-10).

4-95