Excessive vibration
| Cause | Correction | |
| Engine not running smoothly |
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Refer to Troubleshooting Logic for rough running or misfiring. |
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| Loose or broken engine mounts |
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Check/replace mounts. |
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| Damaged fan or malfunctioning accessories |
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Check/replace the vibrating component. |
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| Malfunctioning vibration damper (six-cylinder only) |
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Inspect/replace the vibration damper. |
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| Malfunctioning fan hub |
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Inspect/replace the alternator. |
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| Worn damaged alternator bearing |
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Check/replace the alternator. |
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| Flywheel housing misaligned |
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Check/adjust flywheel alignment. |
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| Loose or broken power component |
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Inspect the crankshaft and rods for damage that cause and unbalance. |
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| Worn or unbalanced drive line components |
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Check/repair according to the equipment's manufacturer's procedures. |