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Onan 20DGAB


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  #1  
Old 09-09-2017, 02:02:05 PM
farmgen farmgen is offline
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Default Onan 20DGAB

I'm looking for a service manual 934-0502 for an onan generator 20DGAB E910386280 spec 39642F

need page 3-4 the engine control monitor schematic.

Thanks
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Old 09-09-2017, 02:55:56 PM
KPack KPack is offline
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Default Re: onan 20DGAB

Maybe when twinslan onan manuals comes back up. I don't keep all the manuals anymore.
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Old 09-09-2017, 07:42:51 PM
farmgen farmgen is offline
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Default Re: onan 20DGAB

Thanks for checking Kpack.

i have a project. the leads have been taken loose from the board tb 1 terminals.
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Old 09-09-2017, 08:20:07 PM
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Default Re: Onan 20DGAB

Kevink or mbb may have that manual.
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Old 09-09-2017, 10:04:27 PM
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Billy J Shafer Billy J Shafer is offline
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Default Re: Onan 20DGAB

Scanner is messed up. I will try and get a better copy.
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Old 09-09-2017, 10:59:46 PM
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Default Re: Onan 20DGAB

This is a better scan of the board.
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Old 09-10-2017, 12:15:35 AM
Doug Reed Doug Reed is offline
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Default Re: Onan 20DGAB

I've moved most of the TwinsLAN files to a Google Drive but I don't see 934-0502 in the file list. When TwinsLAN is back working again, check there to be sure. The manuals for a lot of the newer 4-letter gensets are not available here.
https://drive.google.com/drive/folde...28?usp=sharing
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Old 09-10-2017, 09:59:58 AM
farmgen farmgen is offline
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Default Re: Onan 20DGAB

Thanks Billy J that was the page i needed. Thanks Doug for the site you posted. we can never have enough resources.

I'm having trouble figuring out where to land the 3 white leads from the engine and the missing leads from the time delay card A15 onto the motor control card terminal board( TB1)

dose anyone have this information?
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Old 09-10-2017, 10:17:04 AM
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Default Re: Onan 20DGAB

farmgen,

Click on my user name, and send me a PM. I can get the book for your unit to you.

The A15 was an optional glow plug timer, and is on document page 15 of what I can send you. The three wires you're speaking of, they don't have any kind of wire number marked on them?
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Old 09-10-2017, 01:51:21 PM
farmgen farmgen is offline
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Default Re: Onan 20DGAB

Thanks EricWood , i hope i sent the pm correctly.
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Old 09-10-2017, 06:14:25 PM
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Default Re: Onan 20DGAB

farmgen,

No, I never got a PM from you.

Click on my username again, and out of the available options, select "Send email to EricWood."

Then, when the pop-up mail form shows up, type in a good email address I can reach you at, then send.


Eric
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Old 09-10-2017, 09:27:03 PM
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Default Re: Onan 20DGAB

thanks Eric, i got the down load, looks great, I will work on the gen later this week and post the results.
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Old 09-10-2017, 10:11:35 PM
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Billy J Shafer Billy J Shafer is offline
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Default Re: Onan 20DGAB

Best thing to do. Is study the manual. Get to know the system the best you can before you start work.
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Old 09-12-2017, 06:10:22 PM
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Default Re: Onan 20DGAB

Thanks everyone. with your advice and drawings. I was able to wire the time delay card A15 and engine into the A11 motor control card. we have engine rotation now via the start switch.
my next step is to prime the fuel system. already have checked the unit oil and coolant system and start up procedures. with luck should have it's smokestack blowing diesel smoke this weekend.
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Old 09-12-2017, 06:58:33 PM
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Default Re: Onan 20DGAB

I sent a copy to Doug to upload.
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