JLG X20JPLUS Operator, Safety, Maintenance And Service Manual page 160

MAINTENANCE
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 safety of the ope‐
rator.
Fig. 162 Removing rubber track example
158 Boom Lift Models X20JPLUS
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 until
the grease begins to
drain by unscrewing the
valve of not more than
one turn at a time.
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 lift it
from the idler.