TM 9-2320-269-10
AIR AND AIR BRAKE SYSTEM-M876 TRUCK
A basic knowledge and understanding of the compressed air, air brake system and components is important in the
operation and maintenance of the M876 telephone utility maintenance truck. The following is a brief description of the
brake system:
Type of Air Brake System
The brake system is a dual (split) air type with a primary and secondary supply system, designed to allow the operator to
bring the truck to a safe stop if an air leak develops in either one of the systems. In addition, if air pressure is lost in the
primary system, the spring (parking) brakes will automatically apply and bring the M876 truck to a gradual stop.
Alcohol Evaporator
The alcohol evaporator is designed to permit vaporized alcohol to be drawn into the air brake system to overcome possible
air system freeze-up while operating in subfreezing weather.
WARNING
Using only pure methanol alcohol when refilling the alcohol evaporator. Other types of
alcohol and antifreeze solutions contain ingredients harmful and damaging to internal parts in
the air system.
NOTE
The Installation of an alcohol evaporator does not eliminate the need for normal daily draining of
all reservoirs.
TA 222578
2-82
