TM 9-2320-360-10
b. Check AIR CLEANER RESTRICTION indicator (1) frequently. Shut down engine immediately
when yellow diaphragm enters red zone. Check other gages and indicator lights on main instrument
panel to be sure dust does not affect equipment.
c. Set central tire inflation system (CTIS) rotary selector switch (2) to CROSS COUNTRY position
CAUTION
Avoid using LOW transfer case with selector in 1 (first range). If
using LOW transfer case & 1 (first range), do not exceed 1200 RPM
when starting from a stop. If the tractor does not move prior to
reaching 1200 RPM, do not continue to increase engine RPM.
Failure to comply may result in driveline damage.
d. Set TRANSFER CASE shift lever (3) to LOW position.
e. Accelerate slowly so tires do not spin and dig into sand or mud. Set CTIS switch (2) to MUD,
SAND & SNOW position if tires spin (para 2-13).
f. Set DRIVELINE control (4) to LOCK position for added tire traction.
CAUTION
Do not downshift into 1 (first range), with transfer case in LOW,
while engine speed is above 1200 RPM. Failure to comply may
result in driveline damage.
g. Shift transmission range selector (5) to lower gear range for added tire traction.
NOTE
Do not straddle or drive on sides of sand mounds. Loose sand
will not support HET Tractor on steep slopes.
Drive HET Tractor slowly when in loose sand or mud to avoid
becoming stuck.
h. Keep accelerator pedal (6) steady after HET Tractor reaches desired speed.
Change 3 2-185
