561M Pipelayer Caterpillar

Power Train Oil Pump

Usage:

561M 1KW

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Illustration 1	g00482050
Components of the power train oil pump (1) Manifold (2) Gear (3) Pump body (4) Gear (5) Pump body (6) Gear (7) Cover (8) Idler gear (9) Idler gear (10) Idler gear (A) Torque converter and lubrication section (B) Control section for the transmission clutches, steering clutches, and brakes (C) Torque converter scavenge section

The power train oil pump is a three-section gear type pump. The pump is fastened to the right side of the torque converter and driven by a gear in the torque converter housing.

Gear (2), gear (4), and gear (6) are driven by a gear in the torque converter housing. Gear (2) turns idler gear (10), while gear (4) turns idler gear (9) and gear (6) turns idler gear (8) .

During operation, oil from the bevel gear case enters pump section (B) of the pump through a passage in pump body (3). The oil fills the space between the gear teeth. When the gears turn, oil is sent through another passage in pump body (3) in order to supply the steering clutches, transmission control valves, and the brake control valve.

Oil from the bevel gear case enters pump section (A) also through a passage in pump body (3). The oil fills the space between the gear teeth. When the gears turn, oil is sent through a passage in pump body (5) in order to supply oil to the torque converter. This oil also provides cooling and lubrication for the steering clutches, the brakes, and the transmission.

Oil from the torque converter sump goes through a screen before going to pump scavenge section (C) through a passage in manifold (1). The oil is pumped in the same manner as the other sections. The oil goes through a passage in manifold (1) and to the oil reservoir in the bevel gear case.

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