JLG X17J Plus Operator Manual - Manual (Page 123)

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7.11 MAINTENANCE ON THE RUBBER TRACKS
7.11.1 CHECKING THE TRACK TENSION
Stop the machine on solid, level ground. Lift the machine so that it is safe and place stable
supports under the undercarriage chassis for total support. Parallel with the central roller of
the undercarriage, measure distance A from the bottom of the roller to the rigid inside of the
rubber belt. Track tension is normal if the distance A is between 10 and 15 mm.
If the track tension is not within the measurements specified above, that is, it is too loose or
too tight, follow the procedures illustrated in the paragraph below.
7.11.2 LOOSENING/TIGHTENING THE TRACKS
The grease contained in the hydraulic track is pressurised. For this reason, do not loosen
grease nipple 1 more than 1 turn; if the nipple is loosened excessively, it may be expelled due
to the pressure of the grease, putting the safety of the operator at risk.
Never loosen grease nipple 2.
When gravel or mud is stuck between the sprocket and the track links, remove it before loo‑
sening.
1. Remove the screws and the adjusting mechanism access cover 3.
2. To loosen the track, slowly unscrew valve 1 anticlockwise 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 come out, turn the track slowly.
4. When the correct track tension has been obtained, turn valve 1 clockwise and tighten it.
Remove all traces of grease.
BOOM LIFT MODELS X17JPLUS
JLG
X17JPR0020413
5202 02B H19
3
1
2
PERICOLO
A
DANGER