Section J - Tracks
Track Damage
Types of Rubber Track Damage
J-18 J-18
9803-9570-4
Core Bars - Separation
Cause:
1 Low track tension - the core bars are likely to hit the
running gear components and lead to separation from
the track
2 Hard material (stone, metal) stuck between the top of
two core bars.
3 Sprocket teeth badly worn (hook-shaped).
4 Oxidation (rusting) of the core bars.
Prevention:
1 Check the track tension regularly (as recommended
in service schedules).
2 Clean the tracks regularly as recommended,
particularly after operation in clay soil.
3 When fitting a track on a machine, always make sure
that the sprocket is in good condition. If the sprocket
is damaged it must be changed.
4 Regularly clean and grease the components.
Fig 1.
Additional Notes:
If one or more core bars are separated from the track, the
track must be replaced.
Core Bars - Breaking
Breaking in the middle
Cause:
1 Excessive track tension together with a shock load,
for example, climbing pavement edges.
2 Hard material (stone, metal) stuck between the
sprocket and the core bar with excessive track
tension.
3 Abrasion of the teeth.
4 Idler spring ineffective.
Prevention:
1 Check the track tension regularly (as recommended
in service schedules).
2 Clean the tracks regularly as recommended,
particularly after operation in clay soil.
3 The track is not appropriate for the sprocket. Make
sure that the sprocket is not excessively worn and is
in good condition.
4 Clean the spring if it is clogged (with clay, for
instance) and make sure that it is in working order.
Breaking on the wings
Cause:
1 Only one side of the track is in contact with the
ground, for instance, sitting astride a trench, or
passing over pavement edges at an angle.
Prevention:
1 Always operate the machine on both tracks. Use a
ramp to mount and dismount from pavement edges.
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