Causes of damages
A) Steel ropes break
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.
B) Wear and tear of metallic cores
As in the case of the a.m. breakage of steel ropes, an excessive tension might
cause the bending or the breaking of the metallic cores, which can also be caused
by the following:
- Improper contact between sprocket and track;
- Rotation of the inner rollers
- Working in sandy soil.
C) Parting of the metallic cores
The metallic core acts as rubber adhesive
between itself and the steel ropes. Parting
can be caused by excessive tension like the
breakage of the ropes, as a result of the
following:
- The metallic cores have been wound up by
the worn sprocket as shown.
If the sprocket shows wear and abrasion,
replace it as soon as possible. In case of breakage as per paragraphs A-B-C-, it is
necessary to replace the track as this could interfere with proper working.
D) Abrasion and fatigue cracks
1. The cracks at the base of the threads are the result of fatigue rubber bending
caused by the sprocket and the track tensioner as shown in photo 4 in the
appendix.
41
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
PARTI USURATE
WORN PARTS
