TM 5-3805-255-14
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BRAKE SYSTEM
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Brake System General Information
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The loader brake system is a combination air over hydraulic type. An engine driven compressor supplies com-
pressed air for the system. The compressed air is stored in the air reservoir. Air compressor output is regulated by
a governor which is located between the compressor and the reservoir. Brake operation is controlled by two brake
treadle valves. When a brake treadle is depressed, a flow of compressed air is directed from the reservoir to the
power clusters. The air cylinders in the power clusters then act upon the hydraulic cylinder portions directing a flow
of hydraulic fluid to the wheel cylinders in each brake assembly, applying the wheel brakes.
The late type system includes valving in the left-hand treadle valve to apply the brakes automatically when the
pressure drops to 50 psi (344.7 kPa). A warning buzzer sounds when the pressure drops to 60 psi (413.6 kPa).
Figure 14. Brake System Schematic.
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