Section J - Tracks
Track Damage
Types of Rubber Track Damage
J-21 J-21
9803-9570-4
Steel Cord - Separation
Cause:
1 Excessive tension of the track
- during fitting
- excessive tension plus a foreign body
- shearing (sharp bend on hard surface)
2 The sprocket is not appropriate for the track.
Prevention:
1 Check the tension regularly.
2 Make sure that the sprocket is genuine JCB, ensure
sprocket is in good condition.
Fig 6.
Additional Notes:
When the steel cord separates from the rubber at the
junction, the track must be replaced.
Steel Cord - Exposure
Cause:
1 Stones and sharp material can tear the rubber and
expose the steel cord.
Prevention:
1 The life expectancy of a track is greatly reduced by
working on a site where sharp and pointed materials
are numerous. Operate the machine with attention to
the ground surface in rough terrain, e.g. demolition
sites, rocky ground etc.
Fig 7.
Additional Notes:
Individual strands of steel cord sticking out of the track
does not necessarily mean the track needs to be replaced.
Individual strands can be cut off (the number of steel cord
strands is always over specified), however exposed
strands should be repaired immediately (see
recommended repair procedures).
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