TM 9-2320-303-10
2-14.
DRIVING TIPS (Con't).
CAUTION
Excessive use of service brake to control downhill speed will result in
loss of braking power due to heat build-up.
(c)
If you experience a total loss of braking due to heat build-up, apply
engine brake (six cylinders), upshift as engine speed approaches 2100 rpm, and in Drive (D)
position continue to apply engine brake and maintain directional control of vehicle.
CAUTION
Care must be exercised if tractor or trailer ABS light comes on while
driving, possibly indicating an ABS malfunction. Although the regular/
normal vehicle system is still fully operational, you should continue at
a speed no greater than 40 mph (64 kph), until the mission is complete.
When the mission is complete, report to Unit Maintenance to clear the
ABS fault and restore full ABS capabilities.
(d) The anti-lock brake system (ABS) will help in controlling wheel lockup
and tire skidding during an emergency.
d.
Engage interaxle lockout as required.
CAUTION
DO NOT actuate interaxle lockout control valve while tires are spinning.
DO NOT operate vehicle continuously with interaxle lockout control
valve locked during extended good road conditions. Damage to axle
gearing and excessive tire wear could result.
(1)
To lock interaxle, ease up on accelerator pedal momentarily and move
interaxle lockout control valve lever to LOCK position while maintaining vehicle speed.
Proceed over poor road conditions with caution.
(2)
To unlock interaxle, place interaxle lockout control valve lever in UNLOCK
position and remove foot from accelerator.
2-15.
DRIVING.
a.
Perform initial adjustments, daily checks, and self-tests (paragraph 2-11).
b.
Start engine (paragraph 2-12) and allow truck to warm up.
2-69
