Diagnostic Aids
Excessive wear on a drive belts is usually caused by incorrect installation or the incorrect drive belts for the application.
Minor misalignment of the accessory drive pulleys will not cause excessive wear, but will probably cause the drive belts to make a noise or fall off.
Excessive misalignment of the accessory drive pulleys will cause excessive wear and may also make the drive belts fall off.
Test Description
The numbers below refer to the steps in the diagnostic table.
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This inspection is to verify that the drive belts is correctly installed on all of the accessory drive pulleys. Wear on the drive belts may be caused by mispositioning the drive belts by one or more grooves on a pulleys.
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The installation of a drive belts that is too wide or too narrow will cause wear on the drive belts. The drive belts ribs should match all of the grooves on the pulleys.
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This inspection is to verify that the drive belts is not contacting any part of the engine or body while the engine is operating. There should be sufficient clearance when the accessory drive components load varies. The drive belts should not come in contact with an engine or a body component when snapping the throttle.
Step | Action | Yes | No |
|---|---|---|---|
|
Notice: Do not use belt dressing on the drive belt. Belt dressing causes the breakdown of the composition of the drive belt. Failure to follow this recommendation will damage the drive belt. DEFINITION: Wear at the outside ribs of the drive belts due to incorrect installation of the drive belts. | |||
1 | Did you review the Symptoms - Engine Mechanical diagnostic information, and perform the necessary inspections? | Go to Step 2 | |
Inspect the drive belts for proper installation. Is the drive belts installed properly? | Go to Step 5 | Go to Step 3 | |
Inspect for the correct drive belts. Is the correct drive belt installed? | Go to Step 5 | Go to Step 4 | |
Inspect the drive belts for signs of rubbing against a bracket, hose, or wiring harness. Was the drive belts rubbing against anything? | Go to Step 5 | Go to Diagnostic Aids | |
5 | Replace the drive belts. Refer to Drive Belt Replacement - Accessory . Did you complete the replacement? | Go to Step 6 | -- |
6 | Run the engine in order to verify the repair. Is there still excessive drive belt wear? | -- | System OK |
