Hitachi Zaxis 33U-5A, Operator'S Manual

Page: 247 / 340

MAINTENANCE
7-79
Adjust Track Sag (Rubber Crawler) and Check for
Damage
--- daily
Swing the upperstructure 90 ° and lower the bucket to raise
the track off the ground as shown. Rotate the rubber track so
that the track joint is positioned at the upper center of the
track. Measure distance (A) from the bottom of the lower roller
tread to the inner ridge of the rubber track.
Each time, be sure to place blocks under the track frame to
support the machine.
d
CAUTION: To prevent accidents, care should be taken
to ensure that hands, feet, and any body parts do not
become entangled when working around the tracks.
Appropriate sag A 10 to 15 mm (0.4 to 0.6 in)
f
NOTE: Check track sag after thoroughly removing soil stuck
on the track area by washing.
Adjust 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 machine frame to support the
machine. To prevent accidents, care should be taken
to ensure that hands, feet, and any body parts do not
become entangled when working around the tracks.
3. After adjusting both side track sags, rotate the tracks
backward and forward to equalize both side track sags.
4. Recheck the track sag once more. Readjust as necessary.
Check Rubber Track for Damage
Check the rubber track for damage. If any, consult your
authorized dealer for repair.
M1M7-04-006
M588-07-055
M102-07-075
M503-05-050
Joint
Joint
A
Roller
Track Sag (Rubber Crawler)
Side a