D6R Series II Track-Type Tractor Power Train Caterpillar

These pressure taps are located at the top of the transmission case and on the back cover of the transmission at the rear of the machine.

(22) Transmission

(P) Pressure tap for the transmission main relief valve

(L1) Pressure tap for the transmission lubrication

(Z) Pressure port that can be used to measure the temperature of the power train oil system

(A) Pressure tap for the No. 1 clutch

(B) Pressure tap for the No. 2 clutch

(C) Pressure tap for the No. 3 clutch

(D) Pressure tap for the No. 4 clutch

The pressure tap for the torque converter outlet relief valve is located below the floorplate on the torque converter housing.

(7) Outlet relief valve

The pressure tap for the pump drive lubrication is located below the floorplate on the flywheel housing.

(8) Flywheel housing and pump drive

The pressure tap for the brakes is located under the floorplate below the seat on the brake control valve.

(3) Service brake control valve

These pressure taps for the brake lubrication and for the brakes are located on the sides of the machine above the final drives.

(4) Steering differential and brake (left side)

(19) Planetary gears and brake (right side)

(LB1) Pressure tap for the brake lubrication (rear port on left side)

(LB2) Pressure tap for the brake lubrication (front port on right side)

The pressure taps for the priority valve and for the torque converter inlet relief valve are located under the floorplate on the lower left side of bevel gear case.

(5) Priority valve

(M) Pressure tap for the torque converter inlet