TM-9-2320-272-10

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

TECHNICAL MANUAL; OPERATOR'S MANUAL

SEPTEMBER 2004

CHANGE 2

TM-9-2320-272-10 - Page 381 of 481

TM 9-2320-272-10

3-32

3-11. WHEELS AND TIRES

a. General.

Tires are checked as part of Preventive Maintenance Checks and

Services (PMCS) (table 2-3). If tire becomes flat while operating, stop vehicle

immediately, if tactical situation permits. All tires on M939/A1/A2 series vehicles

are bi-directional and do not require any special mounting.

b. Spare Tire.

Models M923/A1/A2, M925/A1/A2, M927/A1/A2, M928/A1/A2,

M931/A1/A2, and M932/A1/A2 (cargo trucks, tractors) are equipped with expendable

spare tire davit boom. The M929/A1/A2, M930/A1/A2 (dump trucks), and the M934

(expansible van) are equipped with an eyebolt for attaching a chain fall. The

M934A1 and M93A2 (expansible vans) are equipped with a davit-expendable boom

and a built-in hand operated winch, while the M936/A1/A2 (wrecker) models use the

vehicle boom and chain to lift and lower spare tire.

(1) Removal

(M923/A1/A2, M925/A1/A2, M927/A1/A2, M928/A1/A2,

M931/A1/A2, and M932/A1/A2).

NOTE

• This operation requires personnel.

• Procedures and illustrations are for M931A2 and M932A2 other

models listed are similar.

(a)

Obtain utility chain (7) and chain fall (6) from tool compartment.

(b)

Secure utility chain (7) around spare tire (11) and take up slack.