KIT-HARDWARE 3E0129 - Caterpillar

Illustration 1 g01115205
Power Train Oil Pump
(1) Inlet for Section "A" (Transmission Scavenge)
(2) Outlet for Section "C"
(3) Outlet for Section "A"
(4) Outlet for Section "B"
(5) Input Shaft
(6) Hub
(7) Scavenge Pump Section "A"
(8) Torque Converter Charging Pump Section "B"
(9) Transmission Charging Pump Section "C"
(10) Inlet for Section "A" (Torque Converter Scavenge) The power train oil pump is a three-section gear type pump. The pump is driven by input shaft (5). The input shaft is coupled to the hydraulic implement pump by a drive shaft that is connected to hub (6). The hydraulic implement pump is driven by the engine flywheel.During operation, oil enters each section of the pump through inlet passages in the pump body. The oil fills the space between the gear teeth. When the gears turn, oil is sent through outlet passages in the pump body.The scavenge pump section "A" (7) is the transmission and the torque converter scavenge section. The scavenge pump section "A" (7) draws oil from the transmission and bevel gear case and the torque converter housing. The oil passes through a screen before the oil leaves the torque converter housing. The oil passes through a screen before the oil leaves the transmission and bevel gear case. Output oil from the scavenge pump section "A" (7) is sprayed on the differential steering components for lubrication. The oil then drips to the reservoir in the main case.The torque converter charging pump section "B" (8) is the torque converter charging section. The torque converter charging pump section "B" (8) draws oil from the oil reservoir in the main case. The oil is drawn through the screen in the suction manifold. The oil then flows to the torque converter charging pump section "B" (8). The screen catches large debris in the power train oil. The screen prevents debris in the power train oil from damaging the power train pump. Output oil from the torque converter charging pump section "B" (8) passes through the torque converter charge filter before the oil flows to the priority valve. The priority valve supplies oil to the torque converter.The transmission charging pump section "C" (9) is the transmission charging section. The transmission charging pump section "C" (9) draws oil from the oil reservoir in the main case. The oil is drawn through the screen in the suction manifold. The oil then flows to the transmission charging pump section "C" (9). The screen catches large debris in the power train oil. The screen prevents debris in the power train oil from damaging the power train components. Output oil from the transmission charging pump section "C" (9) passes through the transmission charge filter before the oil flows to the transmission and to the service brakes.