New Holland LS140 Workshop Manual page 158

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Hydrostatic Pump and Motor Case Drain Flow

During operation of the hydrostatic pumps and mo-

tors, oil from the high-pressure circuit used for lu-

brication oil drains into the pump and motor hous-

The lubrication oil will fill the housings approximately

half full. This oil then becomes cooling oil and will

SECTION 29 - HYDROSTATIC TRANSMISSION

drain from the pumps and motor housings (cases)

through drain lines, 1.

The front hydrostatic pump drains internally to the

rear pump at 2. The oil will drain from the rear pump

and tee into the drain lines from the motors. The case

drain oil returns to the suction side of the main system

gear pump at 3, returning the hot case oil into the hy-

draulic system to be cooled and filtered.

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