4/25/2021 0 Comments Gb Gmt 12A Manual
Brushes have been removed and inspected, polished slip rings.If you follow this to the letter, approvals can be completed in a day or less.For a better experience, please enable JavaScript in your browser before proceeding.All I have done is remove brushes and polish the copper rings they ride on.
Im a newbie to electricity, ie. Gb Gmt 12A Manuals Section OfYou can see which one you need in the onan manuals section of this forum. Next some Onans require both oil pressure and voltage output to stay running after starting. Do not hold down the start-run button until you confirm you DO HAVE OIL pressure or you can ruin your engine. Onan service manuals have a very good troubleshooting section. Also look at the bottom of your post for similiar issues to see if others have asked avbout same type issues. Im confused myself. Before I took it out of the rv a local mechanic told me to plug in a lamp and see if it came on while holding the start button, engine running, and it didnt come on. Now that I have a newer Onan (01 model) in the rv, I dont think I did the test right on this older unit. There must be a way to see if Im putting out voltage without taking the generator out of the rv and putting this one back in. If anyone can tell me where to stick this meter, Ill try that. If it has oil pressure, approx 20-30 within few seconds after starting you can then look in the service manual and see if you need to ground the wire going to the oil pressure sensor switch or remove the wire. Some Onans open the oil switch and some close the switch when oil pressure is present. To test for actual oil pressure I remove the oil pressure sender and install a 60-100 pressure gauge. This is easier said than done, because you are going to have to remove some sheet metal cooling fins and have some 18 inch pipe, a pipe coupling, etc. You will have to be careful with the oil pressure sender, its pot metal aluminum and if it breaks off you will have to use a easy out the remove the remainder, etc. If you keep holding down the start button to run the engine and if no oil pressure you will ruin the engine. If you have oil pressure, look in the service manul for electrical rroubleshooting procedures, and usually first to check is the brushs and if they are free in their brush rigging. Most onans have a run relay that requires BOTH oil pressure and 80-120volts AC to hold in the run relay. If you have oil pressure, just plug in the lamp and hold down the start run button until it starts and if no light in few seconds, its electrical issue. Did you get the SErvice manual and find the troubleshooting tips. Compression is good, much harder to turn flywheel than on newer model, feels good.
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