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JohnF2015
JohnF2015, Small Engine Technician
Category: Small Engine
Satisfied Customers: 1020
Experience:  Owner/Service Technician at S & J Small Engines
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I have a Emerald plus 6500. It does not put out 120 A/C. I

Customer Question

I have a Emerald plus 6500. It does not put out 120 A/C. I have cleaned the slip rings, but still no 120 A/C
Submitted: 1 year ago.
Category: Small Engine
Expert:  JohnF2015 replied 1 year ago.

Hi, my name is***** will be assisting you.

Has it been a while since this machine was operated or run? If so you may have to excite the field in order to make it work again. You can do this with an electric non-reversing drill preferably. Plug the drill into one of your plugs on the generator, start the generator and with it running pull the switch on the drill and turn the drill chuck backwards. It may take more than once to make this work. Be careful because if this does work the drill chuck is going to start turning.

Customer: replied 1 year ago.
No this this generator started and run for 30 minutes every month.
Expert:  JohnF2015 replied 1 year ago.

Try the drill approach just in case. Sometimes these generators will need to be excited in order to get them to produce voltage, you normally only see it on machines that sit for long periods of time with no use but it would be worth the try. If that doesn't revive it we will have to go further.

Customer: replied 1 year ago.
There were no plugin in the generator I plugged it in one in the motorhome and did it several times with no results.
Expert:  JohnF2015 replied 1 year ago.

Coming from the service manual troubleshooting for this problem. Here are the next steps to look at.

Things to check for.

1. Open circuit breaker

2. Open circuit between brush block and CR4 rectifier.

3. Brushes stuck in holder or not making good contact with slip rings

4. Defective CR4 bridge rectifier

5. Open, grounded, or short circuit in rotor, stator, or transformer

Solutions for each of the problems

1 ) Locate cause of overload and correct as required. Reset breaker

2) Check for continuity and correct if circuit is open

3) Release brushes if jammed in holder. Clean slip rings if dirty.

4) Test rectifier and replace if defective

5) Test each component for open, grounded, or shorted windings and replace if defective.

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