631K OEM Wheel Tractor Machine Systems Caterpillar


Location of Components (Hydraulic System)

Usage:

631K WT4

Cushion-Hitch Pump



Illustration 1g03717076

The cushion-hitch pump is an axial piston type pump which is mounted to the steering pump on the front of the transfer case at the rear of the tractor. The cushion-hitch pump provides system pressure for the cushion-hitch system and pilot pressure for the implement system.

Cushion-Hitch Accumulators



Illustration 2g03717074

The cushion-hitch accumulators are mounted to the right-hand side of the hitch frame.

Cushion-Hitch Leveling Valve



Illustration 3g03717090

The cushion-hitch leveling valve is on the right-hand side of the tractor below the cushion-hitch accumulators.

Cushion-Hitch Ride Dampening Valve



Illustration 4g03717089

The cushion-hitch dampening valve is on the right-hand side of the tractor below the cushion-hitch accumulators.

Load Cylinder



Illustration 5g06216195

The load cylinder is mounted to the hitch frame. The cushion-hitch position sensor is located in the load cylinder.

Pilot Control Manifold



Illustration 6g06216198

The pilot control manifold is on the left side of the hitch assembly. The pilot control manifold contains the pressure reducing valve for the pilot system and the cushion-hitch leveling solenoid.

Cushion-Hitch/Pilot Oil Filter



Illustration 7g06216200

The cushion-hitch/pilot oil filter is located in the center rear of the tractor.

Implement Pump



Illustration 8g06216212

The implement pump is mounted to the transfer case at the rear of the tractor. The implement pump provides system pressure for implements added to the tractor.

Implement Control Valve, Pilot Control Solenoid, and Pilot Oil Accumulator



Illustration 9g06216215

The implement control valve, pilot control solenoid, and pilot oil accumulator are on the right-hand side of the rear of the tractor.

Hydraulic Tank



Illustration 10g06216220

Hydraulic oil tank is located on the right-hand side of the machine. The hydraulic oil temperature sensor is mounted in the hydraulic oil tank. The hydraulic return filter is located inside the hydraulic oil tank.

The implements and the cushion hitch systems are supplied by the hydraulic oil tank.

Implement Joystick



Illustration 11g03419081

The Implement Joystick is located on the right side of the operator station inside the cab.

The Joystick is used to operate implements attached to the tractor.

Cushion-Hitch Switch



Illustration 12g03419088

The cushion-hitch switch is located on the joystick control on the right side of the operator seat. The cushion-hitch switch is used by the operator to activate or deactivate the cushion-hitch system.

Implement Lockout Switch



Illustration 13g03717468

The implement lockout switch is located on the console to the right side of the operator seat. The implement lockout switch prevents movement of the implement system.

Implement Electronic Control Module



Illustration 14g03419729

The implement electronic control module is located behind the operator's seat, in the rear access panel. The electronic control module controls all electronic signals from the implement system, including solenoids, sensors, and switches.

Cushion-Hitch ECM



Illustration 15g03717471

The cushion-hitch electronic control module is mounted to the cushion-hitch accumulator bracket on the right side of the tractor.

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