Komatsu WB140-2N Operation & Maintenance Manual page 208

OPTIONAL ATTACHMENTS
6. Loosen the four lock nuts (10) and thoroughly tighten adjusting
dowels (9), until slack is completely eliminated.
7. Starting from the central position, loosen the adjusting dowels
(9)270° (3 to 4 turns) and lock them with lock nuts (10).
8. Start the machine, extend and retract the telescopic arm several
times to make sure it slides correctly.
9. Lubricate all lubrication points on the telescopic arm.
10. Extend and retract the arm one more time to spread the lubricant on
to the slides.
Remark
The wear limit allowed for the shoes is represented by the minimum engagement of the adjusting dowels (9) in
the lock nuts. The shoes must be replaced when the heads of the dowels (9) are recessed 5mm (0.2 in) inside
lock nuts (10). Do not completely remove all slack, to prevent the guides from seizing.
5-12 WB140-2N, WB150-2N