TM 9-2320-272-10
2-15. PLACING VEHICLE IN MOTION (Contd)
(2) Depress lockout switch (1) and
place transfer case shift lever (3) up to
LOW range if vehicle is heavily loaded,
facing a steep grade, and/or operating off-
road.
e.
Apply service brake pedal (6).
f.
Release parking brake lever (4) by
pushing forward to the floor.
g. Engage transmission with
transmission shift lever (2).
(1)
Select 1-5 (drive) if operation
is on good roads and/or is on minimal
grades.
(2) Select 1-4 (fourth) setting if
operation is over moderately hilly road
grades and/or is on restricted road speeds.
(3) Select 1-3 (third) setting if
speed limits are low.
(4) Select 1-2 (second) setting if
operation is over steep grades and/or is on
rough terrain.
(5) Select 1 (first) setting if
operation is under heavy loads, on
extreme grades, and/or is on rough
terrain.
h.
Release brake pedal (6) and depress accelerator pedal (5). Accelerate at a
safe, steady speed.
WARNING
l Do not use hand throttle while driving. The hand throttle will not
disengage when brakes are applied.
l
Do not drive too fast for road or weather conditions! The maximum safe
speed limit for highway is 40 miles per hour. Do not tailgate. Always
maintain a safe following distance. Stopping the M939 family of vehicles can
be adversely affected by poor road/weather conditions, especially if your
truck is lightly loaded. Drive at a slower speed if conditions call for it. Death
or injury to personnel or damage to equipment may occur if excessive
braking is used under these conditions.
CAUTION
l Do not allow engine speed to exceed 2100 rpm in any
transmission gear ratio.
l Do not accelerate at full power when downshifting or upshifting to and
from forward driving range 1 (first).
Upshift or downshift transmission selector lever (2), as necessary, whenever
driving conditions change.
2-105
Change 1