Defender Security 812BF Especificaciones descargar pdf (Pagina 31)

SERVICE INSTRUCTIONS

(TRACKED ONLY)

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.

CHECKING THE RUBBER TRACKS

BREAKAGES OF STEEL CABLES AND METAL CORES.

Excess track tension can cause steel cables to break. Excess tension 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 tile 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.

SPROCKET HOLE

CARVED PROFILE

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 77 78

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Defender Security 812BF Especificaciones Pagina 31