BRAKE SYSTEM - TM-10-3930-615-150009

inner and outer upright assemblies, and provides

as a nut within the gear housing. A double acting valve

additional mast rigidity and an overall truck profile

responds to turns of the steering wheel to apply turning

height of 83 inches while permitting a lift height of 180

power to the steering bellcrank, tie rods and steering

inches. As the plunger of the hydraulic cylinder raises

knuckles on the trailing axle as in conventional manual

the inner upright assembly, tension is applied to chains

steering.

attached between a cross member attached at the top

1-8.

BRAKE SYSTEM. The brake system consists

and reeved around rollers oil the intermediate upright

of a mechanical parking brake and a hydraulic foot

assembly to anchors at tile top of tile outer upright

brake. The mechanical brake operates on a drum on

assembly to separate the inner and intermediate

the travel motor armature shaft. This brake is applied

assemblies from the outer upright assembly.

either by a handle on the floor to the right of the driver

Lift Carriage Assembly. The lift carriage rides

or automatically through spring action as the driver rises

on rollers within the inner upright assembly. Two forks

from the seat.

The hydraulic brake system is a

are mounted on the front of the lift carriage assembly for

conventional automotive type, effective only on the front

handling of loads.

wheels.

1-11.

HYDRAULIC SYSTEM. Tile hydraulic system

1-9.

DUAL LIST MAST ASSEMBLY. The dual lift

consists of a reservoir, pump control valve, hoist and tilt

mast assembly consists of the following assemblies:

cylinder, arid hydraulic hoses. The hoist cylinder raises

1. Outer Upright Assembly. The outer upright

the lift carriage and forks by hydraulic pressure supplied

assembly serves as a guide for the inner upright

by the pump. Gravity lowers the lift carriage.

assembly, a base for the hoist cylinder, and provides

1-12.

LIFT CYLINDER. A compound lift , used on

brackets for connecting the uprights to the power axle

this vehicle. The lift carriage rises to top of the outer

and for connecting the upright to the tilt cylinders.

upright before the inner and/or intermediate uprights

2. Inner Upright Assembly. The inner upright

together with the lift carriage move upward. This is

assembly is nested in and guided by the outer upright

achieved by a dual hydraulic hoist cylinder assembly

assembly. The hoist cylinder, mounted in the base of

with two pistons working in sequence.

the outer upright assembly, is secured to the inner

1-13.

TILT CYLINDERS.

The tilt cylinders are

upright assembly. The inner upright assembly is raised

double-acting. Tile uprights are tilted in and out by

or lowered by action of the hoist cylinder.

hydraulic pressure to the tilt cylinders.

3. Crosshead Assembly.

The crosshead

1-14.

ELECTRICAL SYSTEM. The electrical system

assembly is mounted over tile hoist cylinder. Chains are

is a two-wire, undergrounded type. Tile battery Is

reeved over rollers attached to the crosshead assembly.

connected into the circuit by means of a removable

The lower ends of the chains are connected to the lift

connector. This charging connection is also made

carriage. The upper ends of the chains are anchored to

through this connector. The weight of the operator in tile

the lift cylinder. As the plunger of the hydraulic cylinder

drivers seat closes tile circuit to the accelerating switch

raises the crosshead, tension is applied to the chains,

by an interlock.

Travel control is through the

raising the carriage.

accelerating switch, with circuit made and broken by

4. Lift Carriage Assembly.

The lift carriage

relays. A panic switch mounted on tile dash panel

assembly rides on rollers within the inner upright

opens and closes the travel circuit. The direction of

assembly, which in turn slides up and down inside the

travel is selected by the directional switch lever on the

outer upright assembly to a lift height of 100 inches.

steering gear post. The stop and taillight is enclosed in

1-10.

TRIPLE LIFT MAST ASSEMBLY. The optional

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

triple lift mast assembly consists of the following

mounted on the left side of the hoist upright, is

assemblies:

controlled by a toggle switch on the instrument housing.

1. Outer Upright Assembly. The outer upright

1-15.

BATTERY. The 36-volt battery used will weigh

assembly is a welded one-piece assembly that is

approximately 1600 pounds. The inside of the truck

mounted on the truck frame assembly and encloses the

battery compartment is 26-13/16,inches long, 32-7/8

hoist cylinder, intermediate upright assembly and inner

inches wide, and 23-3/8 inches high.

upright assembly.

1-16.

ACCELERATOR MASTER ASSEMBLY. The

2. Inner Upright Assembly. The inner upright

accelerator master assembly contains three sensitive

assembly is a welded one-piece assembly that is

switches, operated in sequence by cams. The cams are

mounted within the intermediate upright assembly. The

actuated by the accelerator pedal.

The switches

hoist cylinder, mounted at the base of the assembly, is

energize relays which through the SCR control system

secured to the top of the assembly. The inner upright

govern the speed of the travel motor. A potentiometer

assembly is raised or lowered by action of the hoist

governs signal strength and thereby power output of the

cylinder.

SCR travel motor control circuit. The accelerating

3. Intermediate Upright Assembly.

The

switch is located under the floor plate.

intermediate upright assembly is positioned between the

1-3