Replace Rubber Track - Hitachi EX27U Operator's Manual

Replace Rubber Track

CAUTION: Do not loosen valve (1) quickly or
loosen it too much as high-pressure grease in
the adjusting cylinder 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. During this
procedure, the high power track adjuster may
suddenly release the front idler with extreme
force, potentially resulting in personal injury or
death.
1. Removing Rubber Track
(1) Position the blade to the rear of the upperstructure.
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 using a
wrench; grease will escape from grease outlet.
(3) Insert two or three steel pipes into 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 lower from the idler.
2. Installing Rubber Track
(1) Position the blade to the rear of the upperstructure.
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 using a
wrench; grease will escape from the grease outlet.
(3) Engage the rubber track with the sprocket and po-
sition the other end of the rubber track on the front
idler.
(4) While rotating the sprocket in reverse, apply hori-
zontal force to the rubber track to seat it on the
idler.
(5) Insert a steel pipe into gaps among lower rollers,
track frame and rubber track and rotate the rubber
track slowly in reverse to correctly seat the rubber
track on the idler.
(6) Confirm that the rubber track is correctly engaged
with the sprocket and idler.
(7) Adjust track sag. (See page 7-58 and 7-59.)
(8) Lower the machine to the ground.
MAINTENANCE
2
7-60
1
Grease Outlet
Rotating Direction
Steel Pipe
Rotating Direction
Steel Pipe
M586-07-004
M104-07-119
Rubber Track
M503-07-062
M503-07-063