PAD-WEAR 1472864 - Caterpillar

Illustration 1 g00857601
Location of the Accumulator Charging ValveThe accumulator charging valve is located on the left side of the machine under the operator's platform. The accumulator charging valve is mounted on a steel plate which is located next to the brake accumulators.
Illustration 2 g00903183
172-6144 Accumulator Charging Valve (1) Pump inlet port. (2) Tank port and adjustment screw for cut-in pressure and cut-out pressure. (3) Plug. (4) Accumulator port for the front brakes. (5) Flow through port to the hydraulic oil filter. (6) Port for the oil pressure switch for the service brakes. (7) Accumulator port for the rear brakes. (8) Pressure relief valve and standby function. (9) Adjustment screw cover. (10) Priority spool. (11) standby pressure spring.
Illustration 3 g00903355
(1) Inlet from the brake pump. (2) Outlet to the hydraulic oil tank. (4) Accumulator port for the front brakes. (5) Flow to hydraulic oil filter. (6) Port for the brake oil pressure switch. (7) Accumulator port for the rear brakes. (8) Pressure relief valve. (10) Priority spool. (11) standby pressure spring. (12) Charge rate orifice. (13) Check valve. (14) Cut-in, cut-out spool. (15) Inverse shuttle valve.The brake accumulator charging valve controls the flow of oil from the pump to the brake circuits. The hydraulic oil is diverted, based on the pressure of the brake circuits. The standby pressure spring (11) will also maintain a standby pressure in order to supply pressure for the implement system and the steering pilot system.When the engine is started, the accumulator charging valve receives the flow of oil from the pilot/brake pump at the inlet port (1). Pressure relief valve (8) will cause the pump flow to return to the hydraulic tank if the oil