2. The cracks and the curves on the rubber edge are due
to manoeuvring the track where there are concrete
kerbs and sharp edges.
3. The cracks and abrasions on the rubber of the roller guide slides are caused by
fatigue due to the compression of the rubber under the wheel weight combined
with working in sandy soil, or repeated sharp changes of direction as indicated in
photo 6-8-9 (see the appendix).
4. Abrasion on the thread (carved profile?) may be caused, in particular, when
rotating on concrete or gravel surfaces or hard surfaces (see photo 7 in
appendix).
The conditions for possible damage indicated in paragraph D point 1, 2, 3 are not to
be considered deadly for the track and even if there is a gradual or progressive
damage, the track will continue to work. If the progression indicated at point 3
leads to the exposition of the metallic cores. If this exposition is more than half the
track circumference, it is time to replace it. However you can still use it.
E) Cracks due to external factors
The cracks on the track outer surface (the one in contact with the ground) are very
often due to contacts with gravel, sharp stones, sharp material such as metal plates,
nails, glass, which can cause cuts as shown in photo 10 (see the appendix). From
the point of view of rubber property this cannot be avoided although it depends from
working conditions.
The cracks on the circumference inner surface and on the rubber edge comes from
the contact the track has with the crawler body or with concrete sharp edges as
shown in photos 12 and 13 (see the appendix.
The crack increases quite slowly.
Even if it does not look good, the track can still be used in hard working conditions.
5.5.4 Replacing rubber tracks
The grease inside the hydraulic track is under pressure.
Therefore never loosen grease nipple valve 1 for more
than one turn; otherwise it might be expelled under the
pressure of the grease, putting the operator at risk. Never
loosen grease nipple 2. In case of gravel or mud jammed
between the sprocket and the track link, remove them
before loosening.
M
M
M
M
A
A
A
A
N
N
N
N
U
U
U
U
A
A
A
A
L
L
L
L
U
U
U
U
S
S
S
S
E
E
E
E
A
A
A
A
N
N
N
N
D
D
D
D
M
M
M
M
A
A
A
A
II
II
N
N
N
N
T
T
T
T
E
E
E
E
N
N
N
N
A
A
A
A
N
N
N
N
C
C
C
C
E
E
E
E
M
INIDUMPER MODEL
HP 1100
42
CRACK
PERICOLO
DANGER