JLG X20JPLUS - Page 160

158
BoomLiftModels X20JPLUS
MAINTENANCE
MUX20JP021602
1 To loosen the track,
slowly unscrew grease
release valve (1) coun‐
ter‐clockwise for no
more than  a turn. If the
grease does not start
drain, slowly rotate the
track.Ifalsointhiscase
the grease not emerges
repeat the rotation of a
lapofthevalveandthen
slowly rotate the track.
Repeat these steps unt
il
the grease begins to
drainbyunscrewingthe
valve of not more than
oneturnatatime.
Fig.161 Drainingvalve
Thegreasecontainedinthehydraulictracksisunderpressure.Ifthe
valvetracktension istooloose,itcouldbeexpelledundertheeffect
ofthepressureofgrease,seriouslyendangeringthesa
fetyoftheope‐
rator.
2 Useaprybar(4)ofade‐
quate length to force a
toothofthecentralwhe‐
el out of the idler, then
rotate the track slowly
(5) using the pry bar to
help it out, if necessary.
Force(6)sidewaystosli‐
de the track and li
ft it
fromtheidler.
Fig.162 Removingrubbertrackexample