Generators and Motors
[Home] - [HELP] - [Forums] - [Library] - [Photo Gallery] - [Groups] - [Classified Ads] - [Subscribe] - [Links] - [Books] - [Sponsors] -

Go Back   SmokStak > SmokStak® Vintage Electrical Equipment > Generators & Electric Motors General Discussion > Onan Generators
Forgot Password? Join Us!

Notices

Onan Generators Restoring, operating and maintaining vintage Onan generators.

Onan Generators

Onan 3DJA-3r/1r Need Manuals, Wiring Diagrams and Info


this thread has 7 replies and has been viewed 338 times

Reply
 
Thread Tools Display Modes
  #1  
Old 09-26-2017, 03:45:41 AM
Stoltzy Stoltzy is offline
Registered
 
Join Date: Sep 2017
Location: Helena, Montana, USA
Posts: 2
Thanks: 5
Thanked 0 Times in 0 Posts
Thumbs down Onan 3DJA-3r/1r Need Manuals, Wiring Diagrams and Info

I recently picked up an old Onan 3DJA-3R/1R diesel generator. I know nothing about this machine except it is a awesome peace of history and once was an excellent running machine. i found it in a local classified Add dirt cheap. It is mounted on a steel cart with big casters and a 2 1/2 - 3 gallon tank on it.

The lady i got it from said it was her dads and he use to use it when she was younger, many many years ago. It has been sitting out of (most) of the elements for atleast 10 years. I am a Onan finatic so I was all over it.

I brought it home and didnt even try to start it because after taking the top off the control box, i noticed chewed up wires and obvious rust inside. all the wires look as if they have seen years of extreme heat, and they are just brittle to the touch. So i started pulling everything apart, i did take pictures, although they didnt do me much good considering they are all basically the same color.

However, I do believe this thing is worth fixing, but i know nothing about diesels. i have personally restored several onans and even a few kohlers, but all gas engines. I have no manuals once so ever. I have a good idea how things go back together, but not a clue if i am correct. I definitly need some type of wiring diagram, and maybe an idea what to do/expect when trying to start a diesel this old with so much time sitting. i would also just love to know more about it.

I heard that you can get the date from the first 4 numbers of the serial #. if so, it is 1068, does that mean it is october of 1968?

Any and all help would be greatly appreciated
thank you
Attached Thumbnails
Click image for larger version

Name:	20170902_203521.jpg
Views:	69
Size:	146.2 KB
ID:	292267   Click image for larger version

Name:	20170911_231150.jpg
Views:	63
Size:	170.2 KB
ID:	292268   Click image for larger version

Name:	20170911_231159(1).jpg
Views:	61
Size:	159.7 KB
ID:	292269   Click image for larger version

Name:	20170911_231211.jpg
Views:	57
Size:	195.0 KB
ID:	292270  

Reply With Quote
Sponsored Links
  #2  
Old 09-26-2017, 12:22:36 PM
BTPost's Avatar
BTPost BTPost is offline
Moderator
 
Join Date: Jan 2005
Location: Excursion Inlet, Alaska USA 99850-0090
Posts: 4,791
Thanks: 552
Thanked 1,820 Times in 1,187 Posts
Images: 1
Talking Re: Onan 3DJA-3r/1r Need Manuals, Wiring Diagrams and Info

Did you get a Manual, or Set of Manuals for it? I have them ALL, in PDF Format in my Archives, should you need them... I own three xDJAs....
__________________
Bruce in alaska
Reply With Quote
The Following 3 Users Say Thank You to BTPost For This Post:
  #3  
Old 09-26-2017, 01:04:22 PM
MBB MBB is offline
Registered-III
 
Join Date: Apr 2009
Location: Elk Grove Village IL USA
Posts: 3,098
Thanks: 1,332
Thanked 2,426 Times in 1,292 Posts
Default Re: Onan 3DJA-3r/1r Need Manuals, Wiring Diagrams and Info

Here is the build sheet and the wiring diagram.
Attached Files
File Type: pdf 3DJA3R1R.pdf (23.6 KB, 19 views)
File Type: pdf 610-0187.pdf (166.4 KB, 20 views)
Reply With Quote
The Following 3 Users Say Thank You to MBB For This Post:
  #4  
Old 09-26-2017, 11:37:50 PM
Stoltzy Stoltzy is offline
Registered
 
Join Date: Sep 2017
Location: Helena, Montana, USA
Posts: 2
Thanks: 5
Thanked 0 Times in 0 Posts
Default Re: Onan 3DJA-3r/1r Need Manuals, Wiring Diagrams and Info

Thank You so much, I truly appreciate it. If some of these parts dont work, is it even possible to find them? like the solenoids, or the relays?
thanks again for all the help

I was able to get the build sheet, and the wiring diagram. I would be thrilled to have the manuals if at all possible. Do You know much about it? I dont really know anything about it at all. Is it worth restoring? is there any sort of parts out there if some of mine dont work? last but not least, not that it really matters to me, but do they carry any value? Any manuals and/or info You could give Me would be greatly appreciated.
thank you
Reply With Quote
  #5  
Old 09-27-2017, 12:18:20 AM
wxyoung2008 wxyoung2008 is offline
Email NOT Working
 
Join Date: Jul 2011
Location: Dallas, Texas
Posts: 328
Thanks: 196
Thanked 75 Times in 46 Posts
Default Re: Onan 3DJA-3r/1r Need Manuals, Wiring Diagrams and Info

These things will surprise you with the amount of life they still have in them , but I see a lot of exposed wires there. Make sure that you don't start doing any serious cranking before you review the manuals thoroughly and tape up those exposed wire ends!!!!!

You probably should tap the brakes a little bit on this one. This is a project. We all have them. I have 2. You are probably going to have to rebuild the whole control box. I would say first you need to evaluate what you really have. Can you turn it over by hand? Any water in the internals or the oil. Is the unit complete or are there major parts missing ? And you will have to become intimate with the wiring of that machine.Right now you cannot trust a single connection to be correct and that is all that is standing between you and white smoke ....from the generator end.

As far as the value, there is no antique value. But if you can somehow get this thing going again, hearing a DW Onan and Sons generator that you brought back to life is awesome.
Reply With Quote
The Following 2 Users Say Thank You to wxyoung2008 For This Post:
  #6  
Old 09-27-2017, 07:39:41 AM
MBB MBB is offline
Registered-III
 
Join Date: Apr 2009
Location: Elk Grove Village IL USA
Posts: 3,098
Thanks: 1,332
Thanked 2,426 Times in 1,292 Posts
Default Re: Onan 3DJA-3r/1r Need Manuals, Wiring Diagrams and Info

OK here is a link to the manuals. Look for 967-0124 967-0224 967-0755

https://drive.google.com/drive/folde...28?usp=sharing
Reply With Quote
The Following 2 Users Say Thank You to MBB For This Post:
  #7  
Old 09-27-2017, 08:58:22 AM
Tracy T Tracy T is offline
Subscriber
 
Join Date: May 2009
Location: Cedarbluff, Virginia, USA
Posts: 1,387
Thanks: 412
Thanked 523 Times in 315 Posts
Default Re: Onan 3DJA-3r/1r Need Manuals, Wiring Diagrams and Info

Looks like a magniciter unit, you will definitely want to let the guys that have that type generator chime in BEFORE you attempt to start it! Don't be surprised if it starts right up, diesels tend to survive a long sitting period better than their gas counterparts.
Reply With Quote
  #8  
Old 09-27-2017, 12:12:28 PM
BTPost's Avatar
BTPost BTPost is offline
Moderator
 
Join Date: Jan 2005
Location: Excursion Inlet, Alaska USA 99850-0090
Posts: 4,791
Thanks: 552
Thanked 1,820 Times in 1,187 Posts
Images: 1
Talking Re: Onan 3DJA-3r/1r Need Manuals, Wiring Diagrams and Info

Nope, definitely NOT a Magniciter Unit... It is a Exciter Cranked Genend... The Generator End is the Starter Motor... You will need a very STRONG and HOT Battery, to start this Genset... Be very careful of the DeCompression Solenoid up on the Valve Cover, as these are extremely RARE, as used parts... The Little Rectangular Can Relay in the Control section is also fairly Rare, and does the Switching for the Battery Charging Circuit... Also check the Flicker Switch that runs off the Cam, as this is part of the Voltage Regulation Circuit...

These are GREAT Little Gensets for Remote Cabins, especially if you happen to get one of the Marine (Water Cooled with Heat Exchanger) versions... They are perfect for a small CoGeneration Setup....
__________________
Bruce in alaska
Reply With Quote
The Following 2 Users Say Thank You to BTPost For This Post:
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

F o r u m Jump

Similar Threads Chosen at Random
Thread Thread Starter F o r u m Replies Last Post
Looking for wiring diagrams/user manuals or any information Samuelfraz Welding Shop 5 01-14-2015 08:24:38 PM
Onan 4.0BFA1R no idle need Walbro LUA diagrams service manuals dodgetrucks Onan Generators 12 04-02-2014 02:29:03 AM
Onan 12RJC-4R8/4499C manuals & wiring diagrams needed. Chris Schmidt Onan Generators 3 11-06-2012 08:41:33 AM
Need manuals, wiring diagrams for genset model 4.5CKM21-RV Chris Schmidt Kohler Generators 4 02-26-2011 02:22:39 AM
Need manuals, wiring diagrams for genset model 15RM61 Chris Schmidt Kohler Generators 3 02-18-2011 09:39:59 AM


Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 08:11:55 PM.

Smokstak and Enginads site search!


All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark - A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2016 by Harry Matthews P.O. Box 5612 - Sarasota, FL 34277