12 Valve 1 Wire Alternator 3934778 for 5.9 Cummins 6bt

Alternator 3934778

Specifically, it was used in some models of the Chevrolet Camaro, Pontiac Firebird, and Chevrolet Corvette from the 1970s to the early 1980s. It is a 63-amp alternator with an external voltage regulator.

If you have a specific question or issue related to an alternator with this part number, please let me know and I'll do my best to assist you further.

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What Is Cummins 6bta 5.9 Alternator?

The Cummins 6BTA 5.9 is a diesel engine that is commonly used in a variety of applications, including marine, industrial, and automotive. The alternator used with this engine varies depending on the application and the specific alternator manufacturer.

Generally, the alternator used with the Cummins 6BTA 5.9 engine is a heavy-duty, high-output alternator capable of providing ample electrical power for the engine's needs. The alternator typically has an output of 100-200 amps and may be externally or internally regulated, depending on the specific application.

Some popular alternator manufacturers for the Cummins 6BTA 5.9 engine include Delco Remy, Leece Neville, and Bosch. It's important to consult the engine and alternator specifications for your specific application to ensure you select the appropriate alternator.

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How to Repair 12 Valve Cummins 1 Wire Alternator?

If you have a 12 valve Cummins engine with a 1-wire alternator that needs to be repaired, there are several steps you can take:

Check for obvious problems: Before you start disassembling the cummins 1 wire alternator, check for any obvious problems like loose connections, damaged wiring, or a broken belt. Sometimes these issues can be fixed quickly without having to disassemble the alternator.
Remove the alternator: If you need to repair the alternator, start by removing it from the engine. Make sure to disconnect the negative battery cable first.
Disassemble the alternator: Once you have the alternator removed, disassemble it carefully, taking note of how the various parts fit together. Use a service manual or repair guide for your specific alternator to guide you through the process.
Inspect the parts: Look for any signs of damage or wear on the alternator parts, including the brushes, bearings, stator, rotor, and diodes. Replace any parts that are damaged or worn beyond repair.
Test the alternator: Once you have replaced any damaged parts, test the alternator to ensure that it is working properly. You can use a voltmeter or ammeter to check the output voltage and current.
Reassemble the alternator: Once you have completed the repairs and verified that the alternator is working correctly, reassemble it carefully, making sure all the parts are in their proper places.
Reinstall the alternator: Finally, reinstall the alternator back onto the engine, reconnecting the negative battery cable and any other connections you disconnected during the removal process.