TM 5-3805-261-10
THEORY OF OPERATION - CONTINUED
0003 00
AIR AND BRAKE SYSTEMS
0003 00
1.
General. A gear-driven, two-cylinder air compressor mounted at the left forward side of the engine provides air pres-
sure for the service brakes. A dual section air reservoir is connected by air lines and mounted under the rear of the
machine. A governor controls the pressure.
AIR COMPRESSOR
AIR DRYER
(IF EQUIPPED)
SERVICE BRAKE
EMERGENCY BRAKE
CONTROL VALVE
BRAKE TREADLE
VALVE
SPINDLE HOUSING
EMERGENCY BRAKE
SERVICE BRAKE
ACTUATOR
CONTROL PEDAL
397-928
Service Brakes. A foot pedal operated air valve in the cab directs air pressure through air lines for engaging multiple oil
2.
disc brake assemblies for each wheel, within the tandem and spindle housings.
Parking/Emergency Brakes. Multiple oil disc-type located in the transmission case. Manually actuated by forward
3.
movement of red lever on transmission control console. Lever engages parking brake and activates transmission neutral
lock to prevent machine movement. Brake is spring engaged and air disengaged. Can be used for emergency stopping if
air supply fails.
Emergency Braking. Dual air system provides separate circuit at each tandem for safety. Malfunction of one circuit
4.
leaves remaining circuit with at least half of original braking capacity.
ELECTRICAL SYSTEM
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1.
The electrical system consists of two 12-volt batteries connected in series with negative grounding, providing 24 volts to
operate the electrical systems and components.
2.
The system contains all the necessary switches, circuit breakers, fuses, relays, harnesses, and connectors to operate the
machine, including a NATO slave receptacle.
3.
The major systems comprising the electrical system are:
a.
Starting system
b.
Charging systems
c.
Monitoring system panel
d.
Service, work, and blackout lights
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