TM 5-3805-263-14&P-3
AIR SYSTEM AND BRAKES WITH
Service Brakes
TWO SECTION AIR TANK
Four disc-type brakes, one in each wheel spindle
housing, are used for the service brake system. The
INTRODUCTION
cooling of the brakes is through the oil in the drive
tandems. The service brakes are activated by air
pressure.
Air from both sections of air tank (6) goes to control
valve (13) for the service brakes.
AIR TANK WITH TWO SECTIONS
CONTROL VALVE FOR SERVICE BRAKES
5. One-way check valve for left section of air tank. 10.
13. Control valve.
One-way check valve for right section of air tank.
Pushing the brake pedal on control valve (13)sends
an air signal to right and left sides of the machine
The brake system is activated by air pressure. Air
respectively. The position of the brake pedal controls the
compressor (2) sends pressure air to air tank (6) through
amount of the air signal. When the brake pedal is held in
one-way check valves (5) and (10). The air tank is
the brake ON position, pressure air is held in the brakes
divided into two separate sections. Each section has a
to keep the brakes in the brake ON position.
safety valve and a drain valve. Air from the section on
When the brake pedal is released the air signal is
the left side of the machine goes to one of the air
released through the control valve. With no air in the
pressure gauges (11). Air from the right section of the
lines, a passage is opened to release the pressure air in
air tank goes to the other pressure gauge. Pressure air
the brakes.
then goes to the separate circuits in the air brake
system.
Parking Brake
In case of a failure in a line or one of the circuits, one
A disc-type brake in the front part of the transmission
section of the air tank will still have pressure air to
housing is used as the parking brake. Roto chamber (8)
engage the brakes on one drive tandem.
on the side of the transmission activates the brake.' The
parking brake is air released and spring engaged.
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