Check And Adjust Track Tension (Machine Equipped With Steel Shoe) - Komatsu PC18MR-3 Operation & Maintenance Manual

MAINTENANCE
CHECK AND ADJUST TRACK TENSION
(Machine equipped with steel shoe)
The wear of the pins and bushings on the undercarriage will vary with the working conditions and type of soil, so
inspect the track tension frequently in order to maintain the standard tension.
Stop the machine on firm, horizontal ground when carrying out the inspection and maintenance.
Checking
1. Run the engine at low idle, 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 shoe
plate (2), then place it on top of the track.
3. Measure the maximum deflection between the top surface of
the track and the bottom surface of the wooden block.
Standard deflection
Deflection "a" should be 5 to 15 mm (0.197 to 0.6 in).
If the track tension is not at the standard value, adjust it in the
following manner.
Adjustment
There is danger of plug (1) flying out under the high internal pressure of the
grease. Never loosen plug (1) more than 1 turn.
Never loosen any part other than plug (1). Never put your face in the
mounting direction of plug (1).
If the track tension cannot be loosened with the procedure given here,
please contact your Komatsu distributor.
WARNING
MAINTENANCE PROCEDURE
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