Checking The Rubber Tracks; Support Stand; Checking Track Tension - Timberwolf TW 280TVGTR Instruction Manual

SERVICE INSTRUCTIONS

CHECKING THE RUBBER TRACKS

The structure of the rubber track is shown in this diagram. The
steel cables (1) and metal core (2) are embedded in the rubber.
There are many ways in which rubber tracks may be damaged.
Some of these are terminal for the tracks, others are only cosmetic.
Breakages of steel cables and metal cores
Excess track tension can cause steel cables to break. This may be
caused by:
• Stones or foreign matter accumulating between the track and
the undercarriage frame.
• The track slipping off its guide system.
• Extreme friction such as rapid changes in direction.
• Improper contact between track and sprocket.
• Operation on sandy terrain.
Fatigue cracks and abrasion
Cracks at the base of the carved profiles are caused by rubber fatigue due to bending.
Cracks and bends on the edge of the rubber are caused by manoeuvring the track on concrete edges and curbs.
Cracks and abrasions in the rubber on the guide roller paths are caused by compression fatigue of the rubber due to the
weight of the wheel combined with operation on sandy terrain or repeated sudden changes in direction.
Abrasion of the carved profile may be caused, in particular, by rotation on concrete or gravel surfaces or hard surfaces.
Cracks on the outside surface of the track are often due to contact with gravel, sharp stones and sharp materials such as
sheet metal, nails and glass.
Cracks on the inside surface of the circumference and on the edge of the rubber are caused by contact between track and
the undercarriage structure or with sharp concrete edges.
These methods of damage are progressive. The track can continue to be used until wear exposes the metal cores. If this
exposure extends for more than half of the circumference of the track then it is time to replace the track, even though it
can still be used.

SUPPORT STAND

Ensure the machine is on a flat and solid surface.
1 Loosen the two M10 screws and remove the support stand from its
parked position.
2 Ensure both track legs are fully retracted, then extend fully the track leg
that needs to be clear of the ground.
3 Fit the support stand in its working position (side with the leg extended).
Ensure the securing pins are inserted from the correct side and the R clips
fitted.
4 Carefully retract the track leg until it is clear of the ground.
5 After the work is carried out, extend the track leg fully, remove R clips
and the securing pins and reposition the support stand to its park
position.

CHECKING TRACK TENSION

1 Stop your machine on a flat and solid
surface.
2 Lift it in safe conditions and put stable
supports under the undercarriage frame to
properly support it.
3 Measure distance A at the central roller of
the undercarriage from the bottom of the
roller to the rigid inside surface of the
rubber track. Track tension is normal if
dimension A is between 70 and 75 mm.
4 Adjust tension as described in the following
paragraph if track tension does not comply
with these dimensions (loose or too tight).
C190-0176
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CARVED
PROFILE
1
A
01.03.2019
TW 280TVGTR
2
SPROCKET HOLE
Rev: 2.0