1.
Operate swing, arm, bucket and boom controls
until machine is set up as shown in.
2.
In center of track, measure the distance
between the bottom of frame rails and surface
of shoe.
3.
Perform steps 1 and 2 on right track.
4.
To increase track tension, set machine as
shown in figure and with grease gun inject
extreme pressure No.2 grease into idler
adjustment grease nipple (1) until proper tension
is reached. Perform this procedure on both
tracks.
Slack:
Proper Tension (A): 320 to 350 mm (12.6 to
13.8 inches)
5.
To decrease track tension, set machine up as
shown in figure.
6.
Carefully loosen the adjusting grease nipple (1)
to allow grease to escape.
7.
Tighten grease nipple (1), measure track tension
as shown in figure.
Tightening torque: 49 to 69 N-m (36.6 to 51.4
lbf-ft)
8.
If necessary, perform steps 5 through 7 on
other track.
４
C.
Track Tension
Support lower frame with suitable blocks.
After injecting grease, operate the travel control forward and reverse for the track being adjusted. This
will balance the tension between the idler and the sprocket. Then remeasure as shown in figure.
［
4. MAINTENANCE
］
4-39
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