JLG X14JH Operator Manual - Manual (Page 75)

4. Once the right tension is obtained, turn valve 1 clockwise and then tighten it. Clean any
grease leaks.
5. To stretch a track, put a grease gun inside grease nipple 2 and add grease until the track
deflection is within specifications.
There is something wrong if the track remains stretched once valve 1 has been turned anti‑
clockwise or loose after putting grease in grease nipple 2. In any case, never try to remove
tracks or dismantle the track tension cylinder, as the high pressure of the grease inside the
track is very dangerous.
4.3.3 CHECKING RUBBER TRACKS
The rubber track structure is shown in fig.A. The steel ropes and the metal core are buried in
rubber.
The engraved threads are meant to give stability when moving on soft soil. They are situated
in the lower part of the ground support. The wheel guides, situated inside the track, prevent
the track from coming out of the guide rollers.
Causes of damages
A) Steel ropes breakage
An excessive tension causes the breaking of the steel ropes under the following conditions:
‑
When there is an excess of stones and foreign material between the track and the crawler
frame;
‑ When the track comes out of its guide;
‑ When there is strong friction like quick changes of direction.
BOOM LIFT MODELS X14JH
JLG
72 X14JHR0220311
Fig. A
CORDE
D'ACCIAIO
SCUL TURA
LA TO RUOTA
FORO RUOT A
DENTATA
ANIMA METALLICA
PERICOLO
C ARVED PROFILE
W EEL SIDE
M ETAL CORE
S TEEL ROPES
S PROCKET HOLE
DANGER