Identification and Tabulated Data - TM-10-3930-609-120028

TM 10-3930-609-12

n. Directional Switch. The directional switch

crosshead assembly rises, tightening the chains

selects "forward" or "reverse" operation of the

and raising the lift carriage assembly.

travel motor. This switch is a three-position,

(5) Lift carriage assembly. The lift carriage

assembly rides on four rollers within the inner

manually operated, two-circuit pilot device. The

upright assembly, which in turn slides up and

direction switch is located on the steering gear

down inside of the intermediate upright chan-

post.

nets. Two forks are mounted on the front of the

o. Relays and SCR Control System. The relays

make and break the circuits in response to re-

lift carriage assembly for handling of loads.

h. Lift Hydraulic System. The hydraulic sys-

lated manual and automatic controls. The SCR

tem consists of a reservoir, pump, control valve,

control system provides close stepless control

hoist and tilt cylinder, and hydraulic hoses. The

over the truck travel system with protection

against over-current or overvoltage. These relays

hoist cylinder raises the lift carriage and forks by

are mounted at the rear of the truck.

hydraulic pressure supplied by the pump. Grav-

p. Travel Motor. The travel motor, under the

ity lowers the lift carriage.

operator's floor plate, is a series wound, direct

i. Lift Cylinder. A compound lift is used on

current electric motor. Connected to the power

this vehicle. The lift carriage rises to the top of

axle, it drives the truck forward or backward.

the outer upright before the inner and inter-

q. Hydraulic Pump Motor. The pump motor

mediate uprights together with the lift carriage

for the upright hydraulic system is controlled by

move upward. This is achieved by a dual hy-

a switch which closes the pump motor relay. The

draulic hoist cylinder assembly with two pistons

switch is operated by either the lift control, or

working in sequence.

the tilt control, starting the motor when either

j. Tilt Cylinders. The tilt cylinders are double-

lever is moved about onequarter of its travel

acting. The uprights are tilted in and out by hy-

toward lift or tilt position. The switch is opened

draulic pressure to the tilt cylinders.

when the lever is returned to neutral position.

k. Electrical System. The electrical system is a

The pump motor is a series wound, direct current

two-wire, ungrounded type. The battery is con-

motor.

nected into the circuit by means of a removable

r. Hourmeter. The hourmeter is the only in-

connector. The charging connection is also made

strument used on this truck. This meter auto-

through this connector. The weight of the op-

matically records the number of hours truck has

erator in the driver's seat closes the circuit to the

been in operation.

accelerating switch by an interlock switch. Travel

control is through the accelerating switch, with

circuit made and broken by relay. A panic switch

1-5. Identification and Tabulated Data

mounted on the dash panel opens and closes the

a. Identification. The truck has three major

travel circuit. The direction of travel is selected

identification plates.

by the directional switch lever on the steering

(1) Travel motor identification plate. Lo-

gear post. The stop and taillight is inclosed in

cated on the travel motor housing. Specifies the

a guard on the rear of the truck. The headlight,

manufacturer, type and serial number.

mounted on the right side of the hoist upright,

(2) Pump motor identification plate. Lo-

is controlled by a toggle switch on the instru-

cated on the pump motor housing. Specifies the

ment housing.

manufacturer, type and serial number.

1. Battery. The 36-volt battery (Government-

(3) Manufacturers idetification plate. Lo-

furnished equipment) used will weigh approxi-

cated on the right front of the truck, it speci-

mately 1,600 pounds. The inside of the truck bat-

fies nomenclature, type tires, capacity, manu-

tery compartment is 26 13/16 inches long,

facturer, serial number, model number, registra-

32 7/8 inches wide, and 23 3/8 inches high.

tion number, contract number or order number,

m. Accelerator Master Assembly. The accele-

service weight, wheel loading (no load on

rator master assembly contains three sensitive

forks), wheel loading (rated load on forks), and

switches, operated in sequence by cams. The

center of gravity.

cams are actuated by the accelerator pedal. The

switches energize relays which through the SCR

b. Tabulated Data.

control system govern the speed of the travel

( 1) Capacities.

motor. A potentiometer governs signal strength

Differential _ _ _ _ _ _ _ _ _ _ _ 2

pt (pint)

and thereby power output of the SCR travel

Hydraulic system_ _ _ _ _ _ _ _ 5

gal (gallon)

motor control circuit. The accelerating switch is

Brake system _ _ _ _ _ _ _ _ _ _ 1

located under the floor plate.

Steering gear _ _ _ _ _ _ _ _ _ _ 1

1-4