797B Off-Highway Truck Power Train Caterpillar

Torque Converter and Transmission Hydraulic System

Usage:

797B JSM

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Illustration 1	g00951478
Basic diagram for the power train systems

Schematic

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Illustration 2	g01031186
Power train hydraulic schematic (1) Pump drive (2) Modulating valve (torque converter lockup clutch) (3) Torque converter inlet relief valve (4) Torque converter outlet relief valve (5) Breather (6) Transmission charging filter (7) Transmission hydraulic control (8) Torque converter lockup clutch (9) Torque converter (10) Transmission rear module (11) Diffuser (12) Torque converter charging oil filter (13) Torque converter outlet screen (14) Screen (15) Lubrication relief valve (16) Magnetic screen (17) Transmission magnetic screen (18) Power train oil cooler (19) Transmission front module (20) Suction log (21) Torque converter charging pump section (22) Transmission lubrication pump section (23) Transmission charging pump section (24) Transmission scavenge pump section

Location Of Components

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Illustration 3	g00942303
Left side view of the torque converter lines (1) Pump drive (9) Torque converter (14) Screen

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Illustration 4	g00931153
View A-A (2) Modulating valve (torque converter lockup clutch) (3) Torque converter inlet relief valve (4) Torque converter outlet relief valve (12) Torque converter charging oil filter (13) Torque converter outlet screen (16) Magnetic screen (21) Torque converter charging pump section (22) Transmission lubrication pump section (23) Transmission charging pump section (24) Transmission scavenge pump section (25) Bypass switch for torque converter outlet screen (26) Bypass switch for torque converter charging oil filter

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Illustration 5	g01042564
Left side of power train oil lines (6) Transmission charging filter (9) Torque converter (10) Transmission rear module (12) Torque converter charging oil filter (15) Lubrication relief valve (17) Transmission magnetic screen (19) Transmission front module

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Illustration 6	g00942308
View B-B (Top view of power train oil lines) (6) Transmission charging filter (7) Transmission hydraulic control (15) Lubrication relief valve

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