Komatsu WB93R-5, Operation & Maintenance Manual

Page: 259 / 284

BACKHOE TELESCOPIC ARM
257
CAUTION
q
If the adjusting dowels (9) protrude to the same extent
on the two sides, the operation described at point 6 can
be carried out either on the right or on the left side.
6 - Loosen the four lock nuts (10) and tighten the adjusting
dowels (9) thoroughly, until taking up the slack completely.
(Use a 27 mm wrench and a 8 mm hex wrench).
7 - Starting from the central positions, loosen the adjusting
dowels (9) by 270° (3/4 turn) and lock them with the lock
nuts (10).
8 - Start the machine, extend and retract the telescopic arm
more than once to make sure that it slides correctly.
CAUTION
q
The wear limit allowed for the rubber blocks is repre-
sented by the minimum engagement of the adjusting
dowels (9) in the lock nuts; the rubber blocks must be
replaced when the heads of the dowels (9) are 5 mm
back with respect to the lock nuts (10).
q
When taking up the slack, avoid excessive pressures, in
order to prevent the guides from seizing.
RKA14400
9
10
RWA04050
Shoe to be changed
5 mm
10
RWA03950
9
Reducing clearance
RWA03850
10 9
270
°
Clearance = 0
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