TM-9-2320-272-24-1

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

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4

JUNE 1998

TM-9-2320-272-24-1 - Page 140 of 1015

TM 9-2320-272-24-1

Table 2-1. Unit Preventive Maintenance Checks and Services (Contd).

NOT FULLY

PROCEDURE

MISSION

CAPABLE IF:

55

Biennial

Trans-

mission

NOTE

Perform item 55 only if AOAP laboratory support is

not available.

Change transmission oil, and internal, external, and

governor oil filters every 24,000 mi. (38,000 km) or

24 months, whichever occurs first (para. 3-133).

LUBRICANTS

OE/HDO

Lubricating oil, internal

combustion engine

(MIL-L-2104)

OEA

Lubricating oil, internal

combustion engine (arctic)

(MIL-L-46167)

EXPECTED TEMPERATURES

ABOVE 15°F

+40°F TO -15°F

+40°F TO -65°F

(ABOVE -9°C)

(+4°C TO -26°C)

(+4°C TO -54°C)

OE/HDO 30

OE/HDO 10

OEA

56

Biennial

Transfer

Inspect tightness of transfer case mounting bolts and

case

mounting brackets. Tighten three transfer case mounting

bracket-to-frame bolts 50-60 lb-ft (68-81 N•m) Tighten

seven transfer case-to-mounting bracket bolts 125-135 lb-ft

(170-183 N•m).

57

Biennial

Special

a.

On M929/A1/A2 and M930/A1/A2 model vehicles,

body items

tighten all dump body mounting bolts 240 lb-ft

(325 N•m).

b.

On M931/A1/A2 and M932/A1/A2 model vehicles,

inspect fifth wheel for completeness of assembly. Ensure

mounting screws are tightened 160-170 lb-ft

(217-231 N•m).

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