TRANSMISSION ASSEMBLY - TM-10-3930-647-14-P0024

1-17.

The torque converter has three basic

twin steel rails, an intermediate sec-

components; t h e y a r e t h e i m p e l l e r , t u r b i n e ,

tion and an inner telescoping section.

and housing or stator.

Under normal operat-

The carriage is mounted to this tele-

ing conditions, the action of the impeller

scoping section and the lifting forks

causes the turbine blades to turn almost

are attached to the carriage. A tele-

freely and fluid passes through the converter

scoping hydraulic cylinder within the

easily and quickly, striking each blade at

mast provides the lifting force.

a very slight angle. When a load is en-

countered, the turbine slows down because it

1-21.

SYSTEM DESCRIPTIONS

is directly connected to the load shaft, and

1-22.

ENGINE COOLING SYSTEM. (See

the fluid strikes the turbine blades at a

Figure 1-2.) The engine cooling sys-

sharp angle. As the force of the fluid is

tem consists of the radiator, water

relayed from blade to blade, the output tor-

pump, connecting hoses, engine water

que accumulates. The twisting force that

jacket, thermostat, fan and fan belt.

accumulates as the fluid is directed and

Total cooling system capacity is

redirected is the output torque of the con-

11-l/2 quarts. The radiator is of

verter. Thus, the converter selects the

the heavy duty, tube-and-fin, cross

proper output torque for any load, doing

flow type. Cooling air is drawn

automatically what must be done manually

through the radiator by action of the

in a mechanical transmission.

fan, which is driven by V-belt from

the crankshaft pulley. The thermostat,

1-18.

TRANSMISSION ASSEMBLY. The torque

located between the water pump and cyl-

converter and automatic transmission

inder head, restricts the flow of cool-

assemblies are mounted between the engine

ant through the engine until the engine

and drive axle assembly, immediately below

has warmed up to normal operating temp-

the driver's floor plates. The transmission

erature.

case is connected to the flywheel housing

on one end and the axle adapter housing on

The radio

1-23.

ELECTRICAL SYSTEM.

the other. The transmission assembly is

frequency emission electrical system

controlled by valves mounted on the trans-

is negatively grounded andemploys a

mission. The valves are connected by

12-volt alternator that is mounted to

linkage to rods extending through the floor

the engine and driven by the V-type

plate and up to the cowl. Levers extending

belt.

Output of the alternator is

thru the cowl are easily accessible to the

controlled by a voltage regulator

operator's right hand. By proper manipula-

mounted in the alternator. Major com-

tion of the direction selector, the operator

ponents of the electrical system are

can place the vehicle in neutral, forward,

the alternator, 12-volt storage battery,

or reverse gear. The oil used by the trans-

engine starting motor, distributor, coil,

mission when operating the vehicle is cooled

spark plugs, vehicle lights, and various

by the o i l c o o l e r i n t h e r a d i a t o r .

electrically powered indicators.

1-19.

DRIVE AXLE. The front vehicle axle is

To keep the starter from start-

1-24.

the drive axle of the truck. The axle adapter

ing when the engine is running, a lockout

and axle end assemblies contain the gears,

The automatic dis-

system is employed.

s h a f t s , b e a r i n g s , and-other components

engagement and lockout system functions

necessary to transmit power to the truck

as follows:

drive wheels. The axle is of single speed

The starter relay has points which

type, having double reduction gearing. Final

are closed as long as the engine is not

reduction is achieved at the drive wheels

running.Under this condition, the starter

through a ring and pinion gear mounted in

can be operated.

the axle and housing.

However, when the engine is running

1-20.

U P R I G H T AND CARRIAGE. The upright

the starter relay is energized, the relay

assembly consists of a vertical mast of

points open and the starter circuit is

broken. Thus . . t h e s t a r t e r c a n n o t b e

1-4.

operated.