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TM 9-2320-364-10
2-771
If air pressure gage reads approximately 45 psi (310 kPa) or
less, spring brakes will be fully applied automatically, causing
possible loss of control. Serious injury or death may result.
Maximum braking requires 90 psi (621 kPa) or more air
pressure. If air pressure drops below 90 psi (621 kPa), braking
ability will be reduced. If air pressure continues to drop, air
system is malfunctioning. Brake failure may result causing
injury or death to personnel.
(a)
Continue cautious operation of truck. Brakes on Axles No. 1 and 2
and trailer will operate. Axles No. 3, 4 and 5 will have limited
braking with the spring brakes.
(b)
Leave additional distance between trucks and drive slower.
(c)
Apply service brake pedal (7) earlier than usual when slowing truck.
Apply engine brake only when truck tires have good traction. Use
of engine brake on slick surfaces can cause truck to skid and cause
injury or death to personnel.
(d)
Downshift and use engine brake (6) as required, if necessary, when
slowing truck.
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