Komatsu PC78US-6 Operation & Maintenance Manual page 218

MAINTENANCE PROCEDURE MAINTENANCE PROCEDURE
CHANGE STEEL SHOES OR ROAD LINER TO RUBBER SHOES
When charging from the steel shoe or road liner to the rubber shoe, when changing from the rubber shoe to the steel shoe or road
liner, it is necessary to remove and adjust the idler cushion, so contact your Komatsu distributor to have the change carried out.
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MAINTENANCE MAINTENANCE