Using Rubber Crawler - Hitachi ZX27U-2 Operator's Manual

USING RUBBER CRAWLER

Rubber crawlers are designed to allow the machine to
travel without damaging road surfaces such as paved road
surfaces. Avoid damage to the rubber crawlers by following
the precautions below:
Forbidden Operations
1. Do not operate or steer the machine on or near
river-terrace, boulder and boulder mixed ground,
crushed-stone ground, uneven hardpan surfaces,
stumps, reinforcing bars, scraps, and steel plate
edges. Failure to do so may shorten the service life of
the rubber crawlers to a great extent.
2. Do not leave engine oil, fuel, and other kinds of lu-
bricants remaining on the rubber crawlers, and avoid
traveling on road surface covered with oil to reduce
the danger of sliding.
3. Do not travel the machine while raising one side
crawler off the ground with the front attachment.
Shear or damage to the rubber crawler may result.
Precautions for Using Rubber Crawlers
WARNING: The rubber crawler machine is less
stable than the steel crawler machine, as the edge
of the rubber crawler is easier to deform more
than steel crawler. Pay attention when operating
the machine at an angle to the tracks.
1. Do not store the rubber crawlers in a place where
they will be exposed to direct sunlight for a period of
more than three months.
2. Avoid unnecessary steering operations on concrete
roads, possibly resulting in premature wear of shoe
lugs and core metals. Also, avoid operating the ma-
chine on high temperature [over 60°C (140°F)] road
surfaces during asphalt pavement work, possibly
causing premature wear of the rubber crawlers as
well as damage to the road surface.
OPERATING THE MACHINE
5-17
M1M7-05-015
M1M7-05-016