MAINTENANCE PROCEDURE MAINTENANCE Rubber Shoe Tension - Check/Adjust 0. (Machine equipped with rubber shoes) The wear of the rubber shoe will vary with the work conditions and type of soil, so inspect the wear and track ten- sion whenever necessary. Stop the machine on firm, horizontal ground when carrying out the inspection and maintenance. In particular, on new machines or after new tracks have been installed and the tension has been set to the speci- fied value, the track tension will become loose in the first 5 to 30 hours when the machine has been used for a cer- tain amount of repeated travel.
If the track tension is adjusted frequently until the initial loosening no longer occurs, this will prevent the shoes from coming off due to insufficient track tension. If operations are carried out when the rubber shoe is loose, the track will come off and it will cause premature wear of the core. Checking 0. 1. Run the engine at low idling, move the machine forward a distance equal to the length of track on ground, then stop the machine. 2. Choose wooden block (3) that will reach from idler (1) to carrier roller (2), then place it on top of the track. 3. Measure the maximum deflection between the top surface of the rubber shoe and the bottom surface of the wooden block.
Standard deflection Deflection "a" should be 1 to 3 m (3 ft 3 in to 9 ft 10 in). If the track tension is not at the standard value, adjust it in the following manner. Adjustment 0. Increasing Track Tension 0. NOTICE The standard value is low, so be careful not to tighten the rubber shoe too much. Prepare a grease gun. 1. Pump in grease through grease fitting (2) with a grease pump. 2. To check that the track tension is correct, run the engine at low idling, move the machine forward a distance equal to the length of track on ground, then stop the machine. 3. Check the rubber shoe tension again, and if the tension is not correct, adjust it again. 4.
If the tension is still low after supplied grease, the rubber shoe needs to be replaced or the seal in the cylinder needs to be replaced. Ask your Komatsu distributor for replace- ment. 4-30