Check And Adjust Track Tension - Komatsu D155A-6 Operation & Maintenance Manual

SERVICE PROCEDURE SERVICE PROCEDURE
9. After replacing the element, push the dust indicator button to
reset it. The yellow piston will return to its original position.

CHECK AND ADJUST TRACK TENSION

The wear of pins and bushings on the undercarriage will vary with the working conditions and types of soil. It is thus
necessary to continually inspect the track tension so as to maintain the standard tension.
Carry out the check and adjustment under the same conditions as when operating (on jobsites where the track
becomes clogged with mud, measure with the track clogged with mud).
INSPECTION
Stop the machine on level ground (travel forward and stop the
machine without applying the brake).
Put a straight bar between the carrier roller and idler as shown in
the diagram on the right and measure clearance A between the bar
and the grouser at the center. The tension (clearance A) should be
20 to 30 mm (0.8 to 1.2 in).
If the tension is not the standard value, adjust as follows.
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.
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WARNING
MAINTENANCE MAINTENANCE