Gradall 534B (9103-1380) Operation Manual Manuel d'utilisateur télécharger pdf (Page 25)

This section highlights some common procedures

and discusses areas which may be new to even the

experienced operator.

Hydraulic Controls

All boom and attachment movements are governed

by hydraulic controls. Rapid, jerky operation of

hydraulic controls will cause rapid, jerky movement

of the load. Such movements can cause the load to

shift or fall or may cause the machine to top over.

Feathering

Feathering is a control operation technique used for

smooth load handling. To feather controls, move

control lever very slowly until load begins to move,

then gradually move lever further until load is

moving at desired speed. Gradually move lever

toward neutral as load approaches destination.

Continue to reduce load speed to bring load to a

smooth stop. Feathering effect can be increased by

lowering engine speed at beginning and near end of

load movement.

Boom Control Lever

The boom control lever can be positioned to cause

individual boom movements or combinations of

boom movements as illustrated.

With boom raised above horizontal, forks can be

inserted under a load by moving boom control lever

forward and to the right until forks move forward

horizontally.

With boom raised above horizontal, forks can be

removed from a load by moving boom control lever

back and to the left until forks move rearward

horizontally.

With boom lowered below horizontal, forks can be

inserted under a load by moving boom control lever

back and to the right until forks move forward

horizontally.

With boom lowered below horizontal, forks can be

removed from a load by moving boom control lever

forward and to the left until forks move rearward

horizontally.

The closer the boom to horizontal, the less boom

raise/lower movement required for inserting and

removing forks.

Carriage Tilt/Machine Level Lever

Move lever to left to the tilt forks down and move

lever to rear to tilt forks up.

Move lever to left to tilt main frame to left and move

lever to right to tilt frame to right.

OPERATING PROCEDURES & TECHNIQUES

Always move boom to carry position

(horizontal or below before leveling

frame. Attempting to level machine with

boom raised may caused it to tip over.

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Gradall 534B (9103-1380) Operation Manual Manuel d'utilisateur Page 25

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