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MAINTENANCE
when required
9. Slowly lower the dozer blade side of the
machine body. (Do not start the engine.)
10. Lower the machine body until the
crawlers contact the ground with the
maximum slack.
11. When the crawlers are disengaged from
the idlers, slide the crawlers to the
outside and remove them.
12. Remove the crawlers from the sprockets,
and then remove the crawlers from the
crawler frames.
Installation
1. Engage the crawlers around the left and
right sprockets.
2. Set the left and right crawlers on the
idlers.
3. Start the engine.
4. Press the travel speed button once to set
it to the 2nd speed side. The left and right
crawler belts are tightened simultaneously.
5. Check that the crawler belts are properly
tightened.
6. For rubber crawlers, move the machine so
that the "M" or "∞" mark at the joint is at
the top center of the crawler frame.
7. Inspect the gap (A or B) between the
bottom surface of the frame at the center
of the crawler frame and the top surface of
the crawler.
The gap (A or B) must be within the
following range:
(A) .......Rubber crawler
160 to 180 mm (6.3 to 7.1 in.)
(B) ......Steel crawler
260 to 280 mm (10.2 to 11.0 in.)
(B) ......Rubber pads
245 to 265 mm (9.6 to 10.5 in.)
Note: When the self-adjusting shoe tension
system is properly working, the shoe should
have the gap (A or B) as described above, at
the time of installation.
When the machine is lowered and driven in
2nd speed, the crawler belts will be
stretched to the correct tension. The values
of shoe tension (gap values) after the 2nd
speed travel are different from those
described above.
5-67
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