Gradall 534B (9103-1148) Operation Manual User Manual download pdf (Page 12)

The drive train provides two and four wheel drive

and includes the engine, torque converter,

transmission, propel shaft and front and rear

driving axles.

Inching travel is directly related to drive train

functions and will be discussed in this section.

Two & Four Wheel Drive

The drive train is designed to provide two wheel

drive (front axle driving) or tour wheel drive (both

front and rear axles driving).

Under certain conditions, changing from four wheel

drive to two wheel drive may cause a difference in

the way the machine responds to steering, braking

and drive controls. Always be aware of which travel

mode you are using.

There are two ways to disengage rear wheel

drive:

NOTE: Rear drive axle can also be disengaged in

response to overload in associated electrical

circuitry causing automatic reset type circuit

breaker to trip (open). Breaker will close again in

approximately ten seconds.

Torque Converter

There are no operator controls for the torque

converter. It functions automatically to permit

starting from a standstill in any transmission speed

range.

An oil temperature gage is provided to indicate

operating temperature of torque converter/trans-

mission. Normal operating temperature is 180 -

200°F. (82 - 93°C.). If overheating occurs, attempt

to lower temperature by traveling in a lower gear. If

necessary, stop and allow torque converter to cool

with engine running and gear selector in neutral. Be

sure radiator fins are clean.

Front Driving Axle

The front driving axle includes a differential and

planetary drive hubs and is powered by a propeller

shaft from the transmission. The service

brake/inching pedal is the only operator control for

the front axle (refer to Inching travel Heading).

DRIVE TRAIN

Transmission

The transmission provides three speed ranges for

both forward and reverse travel.

General

Shift to third gear (rear axle drive is engaged only

in first and second gears)

Disengage rear planetary hubs (refer to Rear

Drive Axle heading in this section)

Continued operation of overheated torque

converter/transmission can cause serious

damage to these components.

Gear 1st 2nd 3rd 3rd*

mph 2.8 6.0 15.9 17.9

kmph 4.5 9.6 25.6 28.8

*With rear planetary hubs disengaged

There are three operator controls for the

transmission:

Gear Selector Lever (for 1st, 2nd and 3rd gears)

Direction Selector Lever (for forward, neutral

and reverse)

Service Brake/Inching Pedal (refer to Inching

Travel heading in this section)

To Operate Transmission:

Release parking brake and hold handler in

position using service brake.

Move gear selector to appropriate speed range

(1st, 2nd or 3rd gear). The gear selector may be

shifted while traveling. When traveling downhill,

use the same gear needed to travel up the hill.

Never shift gear selector or direction

selector to cause a sudden change of

travel speed or direction. Such a change

could cause load to shift or machine to tip

over. Reversing direction while traveling

can also damage transmission.

Move direction selector to forward or reverse

position as required.

Release service brake and depress accelerator to

attain appropriate speed.

Stop handler by releasing accelerator and

applying service brake.

Move direction selector to neutral position.

Apply Mico Lock or parking brake as

appropriate.

contined...

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Gradall 534B (9103-1148) Operation Manual User Manual Page 12

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