China OEM Alternator Tensioner Pulley Products - Overrunning AlternatorPulley F-551406 – RNA

Dynamic test with engine running

1.open the hood

2.start the engine and let it idle

3.wear goggles to observe the belt drive

4.run the engine in different speed ranges and perform a visual inspection

5.shut down the engine and observe the alternator pulley for overspeed

Defective flywheels can be identified by the fact that the unit driver does not really operate and the resulting noise. An alternator with a complete flywheel shall decelerate and stop when the engine is switched off.

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Static test with engine off

1.shut down the engine

2.remove the ignition key

3.remove the V-belt

4.remove the cap from the flywheel

5.application of assembly tools (a)

6.grasp and hold the outer ring of the pulley with one hand

7.with the other hand. turn the assembly tool in both directions

If the flywheel works properly. the shaft will rotate freely in one direction and lock in the other. Depending on the manufacturer. the resistance in the locking direction may increase.

If the above results are not achieved. the alternator freewheel clutch must be replaced