D8R Series II Track-Type Tractor Hydraulic System Caterpillar


Pressure Taps

Usage:

D8R II 6YZ
Do not connect the couplings or disconnect the couplings when pressure exists in the system. High pressure in the system can damage the seals.

Locations




Illustration 1g00690742

The steering motor is located under the floorplates in the operator's station.

(1) Steering motor

(A) Pressure tap for the right steering loop

(B) Pressure tap for the left steering loop




Illustration 2g00773840

The pressure control valve is mounted on top of the main case below the seat.

(2) Pressure control valve

(C) Pressure tap for the discharge pressure of the charge pump

(D) Pressure tap for the return line to the case

(R) Pressure tap for the discharge pressure of the implement pump




Illustration 3g00690746

The steering pump is below the floorplates in the operator's station.

(3) Steering pump

(E) Pressure tap for the signal pressure of the Left Steer position

(F) Pressure tap for the signal pressure of the Right Steer position




Illustration 4g00690814

The steering oil filter is located in the compartment on the left fender.

(4) Steering oil filter

(G) Pressure tap for the inlet of the filter

(H) Pressure tap for the outlet of the filter




Illustration 5g00799911

The pressure taps for the steering pilot valve are located under the left console below the steering tiller.

(J) Pressure tap for the Left Steer pilot signal

(K) Pressure tap for the Right Steer pilot signal




Illustration 6g00690848

The hydraulic oil cooler is located on the left side of the engine behind the fan.

(7) Hydraulic oil cooler

(L) Pressure tap for the hydraulic oil cooler outlet




Illustration 7g00690818

The compensator valve is part of the implement pump, which is located below the floorplates in the operator's station.

(14) Implement pump

(P) Pressure tap for the signal pressure of the implement pump




Illustration 8g00773841

The pressure tap for the pilot oil supply is located on the right fender.

(U) Pressure tap for the pilot oil supply

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