JLG X23J Operator Manual - Manual (Page 139)

135
BOOM LIFT MODELS X23J
JLG
X23JR0620113
7.11 RUBBER TRACK MAINTENANCE
7.11.1 C
HECKING TRACK TENSION
Stop the machine on solid, level land. Lift the machine into safe conditions and place stable
supports under the under‑carriage frame for total support. Parallel with the central roller of
the under‑carriage, measure distance A from the bottom of the roller to the rigid inside of the
rubber belt. Track tension is normal if measurement A is between 10 and 15 mm.
If track tension is not within the measurements specified above, loose or too taught, follow
the procedures illustrated in the paragraph below.
7.11.2 O
PERATIONS FOR LOOSENING
/
TIGHTENING THE TRACK
The grease contained in the hydraulic track is pressurised. For this reason, do not loosen the
greasing valve 1 by more than 1 turn; if the valve is loosened too much, it risks being expel‑
led under the effect of the pressure of the grease, putting the safety of the operator at risk.
Never loosen greaser 2.
When gravel or mud are blocked between the toothed wheel and the track links, remove it
before loosening.
1. Remove the screws and take of adjustment access lid 3.
2. To loosen the track, slowly unscrew valve 1 in an anti‑clockwise direction for no more than
one turn. One turn of valve 1 is sufficient to loosen the track.
3. If the grease does not start to drain, turn the track slowly.
4. When correct track tension has been obtained, turn valve 1 in a clockwise direction and
tighten it. Clean all traces of grease.
A
520 202B H19
3
1
2
PERICOLO DANGER