824K Wheel Dozer, 825K Soil Compactor and 826K Landfill Compactor Machine Systems Caterpillar


Location of Components (Hydraulic System)

Usage:

826K 232

Components of the Hydraulic System

  • Hydraulic Tank

  • Hydraulic Oil Temperature Sensor

  • Implement/Steering Hydraulic Pumps

  • Implement ECM

  • Implement Lockout Switch

  • Electrohydraulic Control

  • Lift Cylinder

  • Pressure Reducing Valve (Pilot Oil)

  • Manual Lower Valve

  • Implement On/Off (Pilot Shutoff Solenoid)

  • Pressure Reducing Valve for Dead Engine Lower

  • Pilot Accumulator

  • Implement/Steering Control Valve

  • Pump Case Drain Oil Filters

  • Hydraulic Oil Filters

  • Hydraulic Oil Cooler

Hydraulic Tank



Illustration 1g03682695

The hydraulic tank is located on the right side of the machine behind guarding.

Hydraulic Oil Temperature Sensor



Illustration 2g03682704

The hydraulic oil temperature sensor is located on the back side of the hydraulic tank near the bottom of the tank.

Hydraulic Pump Location



Illustration 3g03706219
(1) Implement pump
(2) Piston Pump (Brake Charging)
(3) Steering pump
(4) Transmission pump

The hydraulic pumps are located under the walkway behind the cab.

Implement ECM



Illustration 4g03370104

The implement ECM is located on the lower back wall of the cab. Access is gained to the implement ECM from the inside of the cab.

Implement Lockout Switch



Illustration 5g03370107

The implement lockout switch is located on the right-hand console forward of the key switch.

Electrohydraulic Control



Illustration 6g03370111

Lift Cylinder



Illustration 7g03370116

Tilt Cylinders



Illustration 8g03370137

Pressure Reducing Valve (Pilot Oil)



Illustration 9g03706283

The pressure reducing valve (pilot oil) is located on the forward section of the hydraulic tank. The pressure reducing valve is the top valve on the highlighted block.

Pilot Accumulator



Illustration 10g03683386

The pilot accumulator is located under the cab on the left-hand side of the machine.

Implement Control Valve



Illustration 11g03370224

The implement/steering control valve is located under guarding on the front of the machine.

Implement Pilot Control Solenoids



Illustration 12g03683479
(1) Lift rod end solenoid
(2) Lift head end solenoid
(3) Tilt head end solenoid (right tilt cylinder 824K and 825K only)
(4) Tilt rod end solenoid (right tilt cylinder 824K and 825K only)
(5) Tilt head end solenoid (left tilt cylinder 824K only)
(6) Tilt rod end solenoid (left tilt cylinder 824K only)
(7) Directional spools for dead engine lower

Hydraulic Oil Return Filters and Screens



Illustration 13g03683531
(1) Primary hydraulic oil filter
(2) Secondary steering return screen (824 only
(3) Case drain return screen
(4) Pilot and brake return screen

The hydraulic oil return filters and screens are located in the tank.

Pump Case Drain Filter



Illustration 14g03683526

The pump case drain oil filter is located on the right-hand side of the machine.

Hydraulic Oil Cooler



Illustration 15g03683523

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