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8-87 8 Troubleshooting Drive Belt Problem: Drive Clutch Engagement (Before Specified RPM) Condition Remedy 1. Drive clutch spring weak — bent 2. Cam arms incorrect — worn 1. Replace spring 2. Replace cam arms Problem: Drive Clutch Engagement (After Specified RPM) Condition Remedy 1. Drive clutch spring incorrect 2. Spider buttons worn 1. Replace spring 2. Replace buttons Problem: Drive Clutch Sticks Condition Remedy 1. Drive clutch components dirty 2. Movable sheave bent — binding 3. Spider buttons worn 1. Clean drive clutch components 2. Clean — replace movable sheave 3. Replace buttons Problem: Drive Clutch Jerks—Shifts Erratically Condition Remedy 1. Drive clutch dirty 2. Rollers worn 3. Cam arms rough 4. Spider buttons worn 5. Sheaves dirty 1. Clean drive clutch components 2. Replace rollers 3. Polish — replace cam arms 4. Replace buttons 5. Clean sheaves Problem: Drive Belt Glazed Condition Remedy 1. Drive belt does not meet measurement specifications 2. Drive clutch spring tension inadequate 3. Drive clutch components dirty — damaged 4. Offset — parallelism — center-to-center distance adjusted incorrectly 1. Replace drive belt 2. Replace drive clutch spring 3. Clean — replace drive clutch 4. Adjust offset — parallelism — center-to-center dis- tance Problem: Drive Belt Lugs Torn Off—Frayed—Worn in One Spot Condition Remedy 1. Drive belt does not meet measurement specifications 2. Offset — parallelism — center-to-center distance adjusted incorrectly 3. Drive clutch engagement — idle RPM too high 4. Drive clutch components dirty — damaged 5. Driven pulley/shaft rotation impaired 1. Replace drive belt 2. Adjust offset — parallelism — center-to-center dis- tance 3. Service drive clutch — reduce idle RPM 4. Clean — replace drive clutch components 5. Service driven pulley/shaft — chain-case components |