TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 198 of 1313
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS - Continued
Table
2.
Description of Interior Cab Components - Continued.
12
FUEL TANK SELECTOR LEVER
- Used on dual tank model vehicles only.
NOTE:
Tanks must be switched
periodically to lessen the buildup of contaminants and fungus.
13
TRANSFER CASE SHIFT LEVER SWITCH
- Used in conjunction with transmission selector lever in
NEUTRAL position to allow transfer case to be shifted between HIGH and LOW gears.
14
ACCELERATOR PEDAL
- Foot control to vary the speed of the engine.
15
BRAKE PEDAL
- Applies the service brakes.
16
DIMMER SWITCH
- Depressed to change between HIGH and LOW beam setting on headlights.
17
FUEL GAUGE TANK SELECTOR SWITCH
- Used to switch fuel gauge to read either left or right fuel
tank. Installed only on dual tank model vehicles.
18
FRONT-WHEEL DRIVE LOCK-IN SWITCH
- A pneumatic switch that permits front-wheel drive to be
engaged when the transfer case is in HIGH position. Operation of switch is not required when transfer case
is in LOW position; system will automatically switch into six-wheel drive.
19
POWER TAKEOFF (PTO) SPRING BRAKE OVERRIDE SWITCH
- Used during rear winch self-recovery
operations of M936/A1/A2 model vehicles only. This air control switch must be held in to override spring
brake air dump switch on transfer case PTO lever.
DIFFERENCES BETWEEN MODELS
Table
3.
Differences Between Models.
EQUIPMENT/FUNCTION
VEHICLE
BODY TYPE
Cargo Dropside
M923, M923A1, M923A2, M925, M925A1, M925A2
Cargo Fixed Side (XLWB)
M927, M927A1, M927A2, M928, M928A1, M928A2
Crane
M936, M936A1, M936A2
Dump
M929, M929A1, M929A2, M930, M930A1, M930A2
Tractor
M931, M931A1, M931A2, M932, M932A1, M932A2
Van
M934, M934A1, M934A2
CENTRAL TIRE INFLATION SYSTEM
M923A2, M925A2, M927A2, M928A2, M929A2,
M930A2, M931A2, M932A2, M934A2, M936A2
FIELD CHOCKS AND ANCHORS
Front
M936, M936A1
TM 9-2320-272-23-1
0002
0002-17
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