BRIDGESTONE | RETREADING
4. IMPROPER REPAIR Tyre repaired beyond repair limits, more than one major repair in each quadrant. Cause: Improper repair carried out by non professional tyre repairer.
5. BEAD DAMAGE (MOUNT AND DISMOUNT RELATED) Cuts and tears to the beads areas including liner. Bead sole is rough and pitted, chafed or abraded. Cause: Caused by improper mounting or dismounting procedures.
6. BEAD SEPARATION May appear as cracking. Any separation between the components in the bead area or the ply turn up. Cause: This type of separation is generally the result of under infl ation / overloading, improper mounting / dismounting procedures, improper bead seating or rim width.
7. BULGE IN SHOULDER AREA Small, localised, often circular, raised or indented pocket on the shoulder area. Cause: Impact damage.
COMMON PREVENTIVE MEASURES:
• Healthy driving habits (avoid rush / speeding on turns)
• • Maintain proper pressure Avoid overloading
12. RUSTED BELT AND CUT CHIP Starting with many small cuts, the tread rubber fl akes off in small pieces, severe chipping can also result in belt exposure leading to rusted belts. Causes: Severe road conditions, improper tyre specifi cation for application, improper infl ation pressure or overload conditions, abrasive road surface or driver abuse.
13. CUT BEYOND REPAIR LIMITS Evidence of a puncture or damage by a foreign object through the crown are a penetrating through the casing, which may result in loss of air and/or detachment. Causes: Sharp stones, glass, nails, bolts, steel bars, rough driving, rough terrain, improper infl ation pressure, improper tyre specifi cation for application, excessive heat generation by high speed driving or a damaged vehicle.
14. RIB TEAR REACHES BELT Detachment between tread rubber and belt, breaker or cap ply. Causes: Belt separation is caused by impact damage, a belt package penetration or excessive heat built up usually as a result of under- infl ation or overloading.
•• Proper mounting and dismounting • Proper storage
• Periodic mechanical parts checks (suspension / braking system etc…)
Proper repairing
real QUESTIONS real ANSWERS JUNE 2011
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