WHEELS AND TIRES
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.
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.
Removal (M923/A1/A2, M925/A1/A2, M927/A1/A2, M928/A1/A2, M9311A1/A2, and M932/A1/A2).
This operation requires personnel.
Procedures and illustrations are for M931A2 and M932A2 other
Obtain utility chain (7) and chain fall (6) from tool compartment.
Secure utility chain (7) around spare tire (11) and take up slack.