Hitachi EX27U Operator's Manual page 167

Converting the Track
The rubber track uses a track adjuster different from that
used for the steel track.
CAUTION:
1. Before converting the track, contact your
nearest authorized dealer. Be sure to change
track adjusters when converting the track
from steel to rubber or rubber to steel. When
doing so, never attempt to disassemble the
track adjuster, as high-pressure grease inside
the track adjuster can cause serious injury if
released.
When replacement or adjustment of the rub-
ber track is required, contact your nearest
authorized dealer.
The track adjuster spring setting force is quite
large. Do no allow anyone to stand in front of
the front idler.
Do not attempt to disassemble the track ad-
juster.
2. With the track removed, the idler will be free
to come off. Be sure to take measures to keep
the idler in position before removing the track.
Change the track adjuster whenever converting the steel
or rubber track. The track adjuster for the steel track is
provided with a decal stating "For Steel Track", whereas
the adjuster for the rubber track has no decals. Take
care not to attach the wrong type of adjuster.
MAINTENANCE
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