TM 9-2350-238-10
DRIVING ON ROUGH AND HILLY TERRAiN
Go up and down long grades in range 2 or 3
(O-15 percent), steep grades in range 1 (15
-30 percent). Don’t coast.
Shift transmission to range 1 (low) before go-
ing up or down steep grades and when start-
ing on a hill.
Don’t hold vehicle on an upgrade by using ac-
celerator. The transmission will overheat.
l Brake vehicle to prevent vehi-
cle speed from overrunning
engine speed. If vehicle
speed overruns engine speed,
you will not be able to down
shift to a lower range and
may lose control of vehicle.
Steer vehicle in a series of short
turns rather than a long, even
turn when operating in loose
sand, dirt, or rocks. This will
allow debris to feed out of
track. If debris accumulates, a
thrown track or damage to
suspension system may result.
1 Trench Crossing. Reduce speed as vehi-
cle approaches edge of trench, then
speed up when tracks contact far side of
trench. Maximum width of trench that
can be safely crossed is 7 ft 9 in. (2.36
m).
2 Steep Grades. Speed up as vehicle
climbs hill; slow down at crest of hill and
while going down. Use range 2 or 3 for
normal grades from 0-15% and range 1
for steep grades from 15-30%.
3 Going Down Hills. Go down hills slowly
and shift to lower range before starting
down. Approach bottom of hill cautiously
to avoid digging in and damaging final
drives or tracks.
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