745 & 740 GC Articulated Truck Caterpillar


General Information (Power Train System)

Usage:

745 3F6


Illustration 1g06193014
(1) Engine
(2) Torque converter
(3) Transmission planetary
(4) Front Wheel and final drive
(5) Front Differential and bevel gear
(6) Front Drive shaft
(7) Output transfer gears and case
(8) Drive shaft
(9) Through hitch drive shaft
(10) Drive shaft
(11) Center Wheel and final drive
(12) Center Differential and bevel gear
(13) Drive shaft
(14) Rear Wheel and final drive
(15) Rear Differential and bevel gear
(16) Main drive shaft

Tractor Arrangement

The engine flywheel drives torque converter (2). The torque converter has an integral lockup clutch. The lockup clutch for the torque converter allows the machine to operate in torque converter drive or in direct drive.

Torque converter (2) is located within the housing for the transmission planetary which is bolted directly to the engine. Transmission planetary (3) contains six hydraulically actuated clutches. The six hydraulically actuated clutches give nine forward speeds and two reverse speeds.

Main drive shaft (16) transmits torque to output transfer gears and case (7). A differential assembly is located in output transfer gears and case (7), and is connected to front drive shaft (6) and drive shaft (8). Front drive shaft (16) is connected to differential and bevel gear (5). Drive shaft (8) is connected hitch drive shaft (9).

Differential and bevel gear (5) transfers drive to wheel and final drives (4) for the front axle.

Trailer Arrangement

Through hitch drive shaft (9) transmits torque to drive shaft (10). The drive shaft transfers drive to center differential and bevel gear (12).

Differential and bevel gear (12) transfers drive to wheel and final drives (11) for the center axle and drive shaft (13).

Drive shaft (13) transmits torque to rear differential and bevel gear (15).

Differential and bevel gear (15) transfers drive to wheel and final drives (14) for the rear axle.

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