TM-9-2320-273-10
TRUCK, TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER
TECHNICAL MANUAL; OPERATOR’S MANUAL
DECEMBER 2012
TM-9-2320-273-10 - Page 253 of 452
OPERATOR MAINTENANCE
OPERATION UNDER UNUSUAL CONDITIONS
UNUSUAL TERRAIN OPERATION
INITIAL SETUP:
References
FM 21-305
References - Continued
WP 0010
WARNING
The driver and passenger must wear seatbelts during vehicle
operation. Ensure seatbelts are fastened and properly
adjusted before placing vehicle in motion. Failure to comply
may result in injury or death to personnel. Seek medical
attention in the event of an injury.
GENERAL
Become familiar with the procedures in FM 21-305 for driving on unusual terrain. The
information on unusual terrain listed in this work package is applicable to all models
except where noted. The M915 and M915A1 are not designed or intended for off-road
use. However, if the adverse conditions described in this work package are
unavoidable, the recommended procedures given should be applied.
CAUTION
Do not use pusher axle during off-highway operations.
Failure to comply may result in decreased traction and
possible damage to equipment.
NOTE
Perform step 1 for M917, M917P1, M919, M920, and
M920P1 vehicles having pusher axle.
When engaging the locking system, the driving axles will
receive equal torque.
1. Relieve air pressure load on pusher axle and raise pusher axle. This will increase
traction by shifting weight to the driving axles.
2. In areas where the ground surface provides poor traction, move differential
LOCK/UNLOCK lever to the LOCK position, refer to WP 0010.
3. Use the differential LOCK/UNLOCK control as needed for better traction.
Disengage differential lockup when conditions return to normal. For instructions
on operating the inter-axle differential lockup system, refer to WP 0010.
END OF TASK
TM 9-2320-273-10
0018
0018-1
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