Hitachi EX20UR-2 Manual page 245

REMOVE AND INSTALL LOWER ROLLER
Remove Lower Roller
1. Jack up one track using the front attachment, and
place blocks (3) under the track frame.
IMPORTANT: When gravel or mud is packed be-
tween sprockets and track links, re-
move it before loosening.
M552-04-005
UNDERCARRIAGE / Upper and Lower Roller
0 0
awl
-7
Grease Outlet
A
CAUTION: Do not loosen valve (1) quickly or
loosen it too much. Valve (1) may fly out or
high-pressure grease in the adjusting cylinder
may spout out. Loosen carefully, keeping body
parts and face well away from valve (1). Never
loosen grease fitting (2).
2. Loosen track links (3) by loosening track adjuster
valve (1) to allow lower roller (4) to be removed.
19 mm
M104-07-119
0
_FU,77rCFC:FTHFF
W507-03-06-005
3. Loosen bolt (1) and remove lower roller (2).
"m./4:
22 mm
0
A
CAUTION: The approximate weight of the low-
er roller is 6 kg ( 13.2 lb ).
0
ORTUDECFD=0E1 -
W507-03.06-005
W03-06-03