V-BELT SET 1N3713 - Caterpillar

Illustration 1 g02733156
Location of the Brake Accumulators for the Service Brakes
The accumulators for both the front and the rear service brakes are located behind the panel on the right side of the machine. The accumulators are mounted in a horizontal position.
Illustration 2 g02732879
(1) Accumulator. (2) Outlet to service brake control valve. (3) Pressure oil chamber. (4) Piston. (5) Chamber for the nitrogen gas. (6) Nitrogen charging valve.
The two accumulators for the service brakes have piston (4), which is sealed. The piston moves back and forth inside the bore of each accumulator. The chamber for nitrogen gas (5) contains a charge of approximately 5515 275 kPa (800 40 psi) of dry nitrogen gas. The dry nitrogen gas is put into the accumulator through nitrogen charging valve (6).Oil from the brake accumulator charging valve flows through port (2). The oil then enters pressure oil chamber (3). The oil then pushes piston (4). The movement of the piston causes the dry nitrogen gas to compress. When the pressure in the accumulator reaches the cutout pressure, the supply of oil is stopped by the accumulator charging valve.When the brake pedal is pushed, oil from chamber (3) flows outward through port (2). This oil flows to the service brake control valve and the oil then applies the service brakes.