VALVE AS-RELIEF 2390995 - Caterpillar

Illustration 1 g03709729
824K Manifold Valve (Brake Charging) (Implement, Steering Pilot)
(A) Supply from brake charging and implement/steering pilot pump
(B) Front brake supply
(C) Implement pilot supply
(D) Steering pilot supply
(E) Rear brake supply
(1) Hydraulic oil filter
(2) Low brake oil pressure sensor
(3) Front brake accumulator
(4) Sequence valve
(5) Pressure reducing valve (Pilot Oil)
(6) Pilot accumulator
(7) Backup relief valve
Illustration 2 g03654768
825K Manifold Valve (Brake Charging) (Implement, Steering Pilot)
(A) Supply from brake charging and implement/steering pilot pump
(B) Front brake supply
(C) Implement pilot supply
(D) Steering pilot supply
(1) Hydraulic oil filter
(2) Low brake oil pressure sensor
(3) Front brake accumulator
(4) Sequence valve
(5) Pressure reducing valve (Pilot Oil)
(6) Pilot accumulator
(7) Backup relief valve
Illustration 3 g03380047
826K Manifold Valve (Brake Charging) (Implement, Steering Pilot) (Clean Emissions Module Fan)
The (Clean Emissions Module Fan) is only equipped on the 826K machines
(A) Supply from brake charging, implement/steering pilot, and CEM fan pump
(B) Front brake supply
(C) Belly guard supply
(D) Implement pilot supply
(E) Steering pilot supply
(1) Hydraulic oil filter
(2) Low brake oil pressure sensor
(3) Front brake accumulator
(4) Sequence valve
(5) Pressure reducing valve (Pilot Oil)
(6) Pilot accumulator
(7) CEM fan
(8) Backup relief valve The Manifold Valve houses the sequence valve and pressure relief/reducing valves that regulate the pressure and supply of hydraulic oil to numerous systems. Hydraulic oil flow enters the manifold valve after going through filter (1). Oil flows three different directions after entering the manifold valve: Oil flows first to the brake system to charge the brake accumulators while the pressure reducing valve (5) supplies pilot flow for steering and implement. On 826K only, the sequence valve will supply flow to the CEM fan after brake and pilot supplies are satisfied. For more information regarding the pilot relief valve, refer to Systems Operation/Hydraulic System, "Pressure Reducing Valve (Pilot Oil)". For more information regarding the CEM fan sequence valve, refer to Systems Operation/Fan Hydraulic System, "Sequence Valve (Clean Emissions Module Fan)".