143H and 163H Motor Graders All Wheel Drive Caterpillar


Gear Pump (All Wheel Drive)

Usage:

143H 1AL



Illustration 1g00494587

(1) Hydraulic and steering pump

(2) All wheel drive gear pump

All wheel drive gear pump (2) is mounted on hydraulic and steering pump (1) . All wheel drive gear pump (2) is driven by the pump shaft from hydraulic and steering pump (1) . All wheel drive gear pump (2) provides pressure in the charge circuit of the all wheel drive system. The pressure in the charge circuit is controlled by two sequence valves in the flushing and cooling control valve. The all wheel drive gear pump provides makeup oil for the closed loop. Also, the all wheel drive gear pump provides oil for the all wheel drive control system.

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