POWER TRAIN - TM-5-2410-237-230040

TM 5-2410-237-23

THEORY OF OPERATION - CONTINUED

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POWER TRAIN

Engine. The D7G is powered by an in-line six cylinder, direct injection diesel engine with scroll fuel system.

Torque Divider. The torque divider connects the engine to the planetary transmission. This connection is both a hydraulic

connection and a mechanical connection. The hydraulic connection is through a torque converter. The mechanical connec-

tion is through the planetary gear set.

Universal Joint. The universal joint connects the torque divider to the transmission and transfers the power at the torque

divider to the transmission.

Transmission. The transmission has three speeds FORWARD and three speeds REVERSE. Valve spools, in the transmis-

sion hydraulic controls, control the clutches in the transmission for the speed and direction of the tractor. The valve spools

are connected to the transmission control lever. This is a powershift transmission.

Bevel Gear, Brakes and Steering Clutches.

The bevel gear transfers the power from the transmission to the steering clutches and final drives. The steering

clutches are controlled from the operator's station by two levers which are connected to the hydraulic clutch valves

through a series of linkages.

The brakes are controlled by pedals in the operator's station. The pedals are mechanically linked to the hydraulic con-

trol valve. The brakes are also activated when the steering levers are fully extended. This permits the tractor to make

a sharper turn.

Final Drives. Driven by gears which transfer power from the steering clutches to the final drive shafts. Attached to the

final drive shaft is the sprocket which turns the track.

Track. Driven by the sprocket, the track moves the tractor forward or backward.

DIESEL

ENGINE

TRANSMISSION

TRACK

FINAL

387-050

U-JOINT

TORQUE

BEVEL

DRIVE

GEAR

DIVIDER

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