FRAME - TM-10-3930-622-140031

e. Sending units. Four sending units are used on

(3) An oil pressure gauge to indicate engine oil

the truck to provide a means of actuating corresponding

pressure in the engine crankcase main oil gallery.

gauges on the instrument housing. The following

(4)

A fuel gauge to indicate the fuel level in the

descriptions are given for each sending unit:

fuel tank.

(5) An engine hourmeter to indicate the hours

(1) The fuel gauge sending unit mounted on

of operation of the truck which determines when periodic

top of the fuel tank float assembly contains an arc-

service operations are due.

shaped resistance coil. A radial contact, operated by a

float within the fuel tank, makes contact with the

(6) A light switch with ON/OFF positions to

resistance coil. Movement of the radial contact varies

activate the taillight.

the resistance of the fuel gauge circuit, permitting a

(7) An ignition switch with ON/OFF positions to

current flow which is proportional to the float position.

activate or deactivate the truck ignition system for

(2) The oil pressure sending unit is connected

operation in addition to energizing the instruments and

into the pressure side of the lubricating oil system. This

starter circuit up to the starter button.

unit contains a coil, the resistance of which varies with

(8)

A starter button to activate the starter

pressure. Actuating current to the instrument passes

motor.

through this resistance coil which varies the current, and

thus the indication, in proportion to the pressure on the

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FRAME.

sending unit.

a. The basic structure of the fork lift truck is the

(3) The temperature sending unit is threaded

one-piece welded frame, to which all components and

into the engine cylinder head to sense and respond to

major assemblies of the truck are attached.

engine coolant temperature.

This unit contains a

temperature sensitive resistance coil which regulates the

b. The running gear is attached to the underside of

flow of actuating current to the engine temperature gage

the frame, the hoisting mechanism is mounted at the

in proportion to engine coolant temperature.

frame front end, and a counterweight is fastened to the

back of the frame. Since the frame houses much of the

(4) The oil pressure sensitive switch mounted

mechanism for the truck, access openings for service

on the oil filter assembly closes when pressure exists in

and maintenance are provided at appropriate locations.

the engine lubricating system, to energize the engine

hourmeter on the instrument housing. Thus, since

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SHEET METAL.

engine oil pressure is always (and only) present when

the engine is operating, the hourmeter will accurately

a. The operator's seat is mounted on top of a

reflect engine hours of operation.

hinged compartment cover. A manually operated latch

at the front of this cover permits raising the cover for

Instruments and controls.

access to the engine compartment from above. Two

g. Instrument housing assembly. The instrument

side engine compartment access doors are hinged and

housing assembly, mounted on the steering column

fitted with hand operated latches.

support assembly, includes the following gauges and

b. A radiator cover plate is bolted to the frame.

switches.

Since the radiator fill neck protrudes above this cover

(1)

An ammeter to indicate the battery charging

plate, it is seldom necessary to remove the plate for

rate.

service; therefore, it is not hinged. The operator's pedal

controls, the steering column, and leads to the

(2) A temperature gauge to indicate the engine

instruments and switches are mounted on or through a

coolant temperature in degrees Fahrenheit.

floor plate.