Hitachi ZAXIS 120-3 class Operator's Manual page 356

Hydraulic
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Loosen the 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).
IMPORTANT: When gravel or mud is packed between
sprockets and track links, remove it before
loosening.
1. To loosen the track, slowly turn valve (1) counterclockwise
using long socket 19; grease will escape from the grease
outlet.
2. Between 1 to 1.5 turns of valve (1) is sufficient to loosen
the track.
3. If grease does not drain smoothly, slowly rotate the raised
track.
4. When proper track sag is obtained, turn valve (1) clock-
wise and tighten to 90 N•m (9 kgf•m, 66 lbf•ft).
Tighten the Track
CAUTION: It is abnormal if the track remains tight af-
ter turning valve (1) counterclockwise or if the track is
still loose after charging grease to fitting (2). In such
cases, NEVER ATTEMPT TO DISASSEMBLE the track or
track adjuster, because of dangerous high-pressure
grease inside the track adjuster. See your authorized
dealer immediately.
To tighten the track, connect a grease gun to grease fitting
(2) and add grease until the sag is within specifications.
OPTIONAL ATTACHMENTS AND DEVICES
2
Grease Outlet
13-5
1
M107-07-075
M104-07-119

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