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Rim & Spur Sprocket Troubleshooting Guide
Spur Sprocket Damage
Rim Damage
Severe Rim Damage
Cause This condition can occur when cutting chain drive links wear through the case-hardened teeth Result Cutting chain can be ruined by damaged spurs Solution If spur sprocket teeth look like this replace im- mediately
Cause Wear can occur under normal conditions. How- ever, check for excessive rim wear and look for wear on outer diameter Result The reduction in diameter can also allow chain drive links to damage the sprocket adapter Solution Replace rim after two chains
Solution Do not fit cutting chain to rims that are severely worn. Serious chain damage will result and the rim may break
Worn Spur
Outer Wear
Broken Rim
Chain Brake Stress
Skirt Wear/Brake Band
Wear/Adapter Damage
Worn Rim and Adapter Spline
Result An overly tightened strap around the drum will cause the strap to rub against the clutch drum which will overheat and soften the metal causing potential drum failure Solution If your chainsaw has a chain brake, always check the brake to make sure it stops the rotating chain when activated. Make certain that the brake strap around the drum is not too tight
2025
TechnicalServices@OregonProducts.com 1.800.223.5168
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