TM-9-2320-430-10
TRUCK, TRACTOR, 8X8, M983
TECHNICAL MANUAL; OPERATOR'S MANUAL
JUNE 2009
TM-9-2320-430-10 - Page 443 of 868
OPERATE VEHICLE IN SAND OR MUD - Continued
CAUTION
Wheel hop condition should be avoided to prevent possible damage to
drivetrain. If wheel hop begins to occur, ease up on throttle to allow tires
to grip surface. If wheel hop continues, release throttle and apply brakes.
Apply throttle slowly as traction permits.
4.
Start slowly. Do not spin wheels when starting to move vehicle.
5.
Set TRACTION CONTROL lever (4) to INTER-AXLE DIFF LOCK for added traction.
Indicator light (5) will illuminate.
6.
Set transmission range selector (6) to 2 (2nd) or 1 (1st), as needed for added traction.
7.
Do not straddle sand mounds or drive on sides of two sand mounds. Loose sand will
not support vehicle on steep slopes.
8.
Keep throttle pedal (7) steady after vehicle reaches desired speed.
9.
Turn vehicle slowly when on loose sand or mud.
10.
Steer vehicle straight up and down hills if possible.
11.
To move vehicle forward and turn after vehicle is stopped in loose sand or mud, do
the following:
a.
Set transmission range selector (6) to R (reverse).
b.
Press throttle pedal (7) and move vehicle straight back about 20 ft. (6.1 m).
c.
Release throttle pedal (7) and press service brake pedal (8).
d.
Set transmission range selector (6) to 1 (1st).
e.
Release service brake pedal (8) and press throttle pedal (7) to move vehicle
forward.
f.
Turn vehicle gradually.
g.
Set transmission range selector (6) to D (drive) when vehicle picks up speed
and is moving forward smoothly.
12.
If vehicle starts to skid, do the following:
a.
Release throttle pedal (7).
b.
Steer in direction of skid until vehicle stops skidding.
c.
Press throttle pedal (7) slowly and steer vehicle on straight course.
TM 9-2320-430-10
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