2333888 SEAL-PISTON Caterpillar parts SEAL
Alternative (cross code) number:
Illustration 1 g00537379
144-8518 Brake Accumulator (1) Nitrogen charging valve. (2) Accumulator. (3) Nitrogen gas charge. (4) Piston. (5) Seal kit. (6) Pressure oil chamber. (7) Outlet to the service brake control valve.Piston (4) moves up and down inside the bore of each accumulator (2). Nitrogen gas charge (3) has a charge of approximately 5520 kPa (800 psi). Each accumulator is charged with nitrogen through charging valve (1) . Oil enters pressure oil chamber (6) from the brake pump. The oil reaches the pressure oil chamber through outlet port (7). The oil pushes piston (4) upward. The pressure of the oil compresses the nitrogen gas.When the pressure in the accumulator reaches approximately 14500 350 kPa (2100 50 psi), the supply of oil is stopped. When either brake pedal is pushed, oil from pressure oil chamber (6) flows out of port (7) to the service brake control valve. This applies the service brakes.