Chapter 6. REPAIR OF DRIVE TRAIN

CHAPTER 6

REPAIR OF DRIVE TRAIN

Section I. TORQUE DIVIDER AND TRANSMISSION

6-1. Genera]

power shift transmission consists of five sets of

planetary

gear

systems

each

which

has

a. Power from the diesel engine is transmitted by

hydraulically actuated clutch. The power flows

the flywheel (3, fig. 6-1) to the torque divider where

through two or more of these systems to the output

i t travels through two separate paths. An internal

shaft (4) of the transmission. Three forward and

coupling gear on the engine flywheel drives the

three reverse speeds are available in the trans-

rotating housing (2), which delivers a larger portion

mission. Selection of the desired speed and

of the diesel engine torque through torque con-

direction is accomplished by positioning spool

v e r t e r . Another coupling gear drives the sun gear

v a l v e s i n t h e t r a n s m i s s i o n h y d r a u l i c controls,

(6) on a planetary gear set to mechanically transmit

located in the upper compartment (2) of the

a lesser portion of the torque to the planet carrier

transmission

case.

(8),

which

splined

the

torque

divider

output

c. The transmission output shaft (4) is splined to

s h a f t (7). Since the ring gear (4) is driven by the

a transfer gear (5), within the transfer case (1).

turbine of the torque converter, this torque is also

This transfer gear drives the bevel pinion (6). From

applied to the output shaft through the planet

t h e bevel pinion the power is transmitted through

carrier (8).

the bevel gear, to the steering clutches, then

b. F r o m t h e t o r q u e d i v i d e r o u t p u t s h a f t ( 7 ) ,

t h r o u g h the final drives to the tracks.

torque is transmitted through the universal joint to

the transmission input shaft (3, fig. 6-2). The

6-1