Komatsu Utility WB97S-5, Operation & Maintenance Manual

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BACKHOE TELESCOPIC ARM
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6.5 BACKHOE TELESCOPIC ARM
6.5.1 DESCRIPTION AND CONTROL
The telescopic arm makes it possible to work with the equipment
installed at a variable distance that is greater than that allowed by
the standard arm.
When the telescopic arm is completely extended, the breakout
force at the bucket pin is reduced and only lighter loads can be
lifted; therefore, suitable buckets must be used (see "6.1
AUTHORIZED OPTIONAL EQUIPMENT").
This structure features an external hollow arm (1) inside which the
arm (2) that supports the equipment slides on adjustable “V”-
shaped guides.
The sliding of the arm is achieved by means of a double-acting
cylinder controlled by an additional distributor.
The movement of the telescopic arm is achieved via the buttons
(3) and (4) positioned on the right joystick lever.
The movements of the main equipment remain unchanged; see
"3.3.5 pos. 18/19 - BACKHOE CONTROL LEVERS".
The movements of the telescopic arm are as follows:
1 - Retraction of the arm, obtained by pressing the push button
(3); the arm stops when the button is released.
2 - Extension of the arm, obtained by pressing the push button
(4); the arm stops when the button is released.
IMPORTANT
q
The telescopic arm controls are inhibited when the safety
button is in locking position (see "3.3.2 pos. 12 - SERVO
CONTROL LOCKING BUTTON").
1
RKA15530
2
RKA15730
3 4
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