TUBE AS 5011424 - Caterpillar

Illustration 1 g06109656The brake accumulators are located in the hydraulic tank compartment on the right side of the machine. The inspection cover has been removed for clarity.The accumulators are mounted in a vertical position.
Illustration 2 g06110319
(1) Nitrogen charging valve
(2) Gas valve cap
(3) Cap
(4) Chamber for the nitrogen gas
(5) Piston
(6) Pressure oil chamber
(7) Cap
(8) OutletThe two accumulators for the service brakes have piston (5), which is sealed. The piston moves up and down inside the bore of each accumulator. The chamber (4) contains a charge of dry nitrogen gas. The dry nitrogen gas is put into the accumulator through nitrogen charging valve (1).Oil from the accumulator charging valve flows through outlet (8). The oil then enters pressure oil chamber (6). The oil then pushes piston (5), and 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 brake accumulator charging valve.When a brake pedal is pushed, oil from chamber (6) flows outward through outlet (8). This oil flows to the brake control valves and the oil then applies the service brakes.