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 251 of 452

OPERATOR MAINTENANCE

OPERATION UNDER UNUSUAL CONDITIONS

EXTREME HOT CONDITIONS

INITIAL SETUP:

References

WP 0003

WP 0035

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.

OPERATING IN EXTREME HOT CONDITIONS

1.

During hot weather, it may be necessary to alter driving procedures to prevent

vehicle from overheating. The following types of operation can cause vehicle to

overheat:

a.

Continuous high speeds

b.

Long, hard pulls

c.

Continuous use of low gear ranges on steep grades or in soft terrain

2.

Check water and transmission temperature gauges and stop vehicle if unusually

high temperature readings are observed. Allow vehicle to cool.

3.

Check cooling system, air cleaner, engine oil level, and radiator ﬁns frequently.

Perform necessary services and notify Field Maintenance of unusual gauge

readings or other problems.

4.

Shorten differential oil change interval (WP 0035).

NOTE

Perform steps 5 through 7 for M915P1, M915A1P1,

M916P1, M917P1, and M920P1 vehicles.

The armored cab absorbs and retains more heat than a

standard cab.

5.

Park vehicle away from direct sunlight whenever possible.

6.

Extend vehicle startup times in order to operate air conditioner to cool down

interior of cab before performing mission.

7.

Extended operation of air conditioner is required to cool the interior of cab in

extreme hot weather.

END OF TASK

TM 9-2320-273-10

0017

0017-1