Dipper Stroke Limiter - jcb JS300 Service Manual

5.1. The distance should be approximately:
Distance: 0.8mm
6. If the clearance is incorrect, contact your JCB dealer.

Dipper Stroke Limiter

NOTICE In some instances it may be possible to hit the cab with the bucket or attachment. To prevent
damage care should be taken when operating with the bucket/attachment close to the cab.
NOTICE It is the operator's responsibility that the position of the sensor is correctly adjusted to prevent the
attachment striking the cab.
General
The dipper stroke limiter allows the inward stroke of the dipper to be restricted and prevent the attachment
from accidentally striking the cab. The adjustment of the dipper stroke limiter is governed by a proximity switch
installed on the boom. The dipper stroke limiter is factory set to 500mm
For the dipper stoke limiter to operate it must be enabled by the JCB Service Master set up tool. When enabled,
it is set up by the DECU (Display Electronic Control Unit).
The dipper stoke limiter defaults to on, every time the ignition key is turned to the on position, but can be
temporarily turned off by the DECU.
When the dipper moves to a preset position detected by the proximity switch, the stroke of the dipper-in service
is stopped.
The dipper-out service will continue to operate and when the dipper moves away from the preset position the
dipper-in service is available. The DECU will show an icon when the dipper gets to the preset position.
Adjusting the Clearance
1. Disable the dipper stoke limiter.
Refer to: Operation > Instruments > Instrument Panel (Page 65).
2. Adjust the positions of the boom, dipper and attachment until the attachment is the correct clearance from
the operators cab.
Refer to: Operation > Operating Levers/Pedals > Excavator Arm Controls (Page 96).
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Operation
Working with the Excavator Arm
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