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

Replace Rubber Crawler --- As required
WARNING:
•
Do not loosen valve (1) too quickly or too much
as high-pressure grease in the adjusting cyl-
inder may spout out. Loosen carefully, keeping
body parts and face away from valve (1). Never
loosen grease fitting (2).
•
When removing the rubber track, do not allow
anyone to stand in front of the front idler. Dur-
ing this procedure, the high power track ad-
juster may suddenly release the front idler with
extreme force, potentially resulting in personal
injury or death.
•
After the rubber track is removed, the front idle
will become free to remove. If the front idle
comes off unexpectedly, personal injury and/or
death may result. Be sure to remove the rubber
track only after taking appropriate measures to
prevent the front idler from coming off.
Removing Rubber Crawler
1. Lower the bucket and blade to raise both tracks off
ground, as shown. Place blocks under machine frame
to support the machine.
2. Slowly turn valve (1) counterclockwise to allow
grease to escape from the grease outlet.
3. Insert two or three steel pipes into the gaps among
lower rollers, track frame and rubber track and slowly
rotate the track in reverse to lift the rubber track off
the idler. Apply horizontal force to pry the rubber track
off the idler. Before completely removing the rubber
track from the front idler, take an appropriate measure
to prevent the front idler from coming off. Then, re-
move the rubber track.
MAINTENANCE
2
Direction of Rotation
7-56
Grease Outlet
1
Direction of Rotation
Steel Pipes
Steel Pipe
M1M7-04-006
M1LA-07-036
M503-07-062
M503-07-063