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Check Track Sag --- every 50 hours
Swing the upperstructure 90° and lower the bucket to raise
the track off the ground as shown.
Keep the angle between the boom and arm 90 to 110
and position the bucket's round side on the ground. Place
blocks under the machine frame to support the machine.
Rotate the raised track in reverse two full rotations and
then forward two full rotations.
Measure distance (A) at the middle of the track frame from
the bottom of the track frame to the back face of the track
shoe.
Track sag specifications --- 210 to 245 mm
NOTE: Check track sag after thoroughly removing soil
stuck on the track area by washing.
Adjust Track Sag
Precautions for Adjusting Track Sag
1. If track sag is not within specifications, loosen or
tighten the track following the procedures shown on
the next page.
2. When adjusting track sag, lower the bucket to the
ground to raise one track off the ground.
Repeat this procedure to raise the other track.
Each time, be sure to place blocks under the ma-
chine frame to support the machine.
3. After adjusting track sag of both tracks, move the
machine back and forth several times.
4. Check track sag again. If track sag is not within
specifications, repeat adjustment until correct sag is
obtained.
MAINTENANCE
(8.3 to 9.0 in)
7-69
M1CC-07-014
M102-07-045
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