Onan/hobart project

Pitbullpride

New User
I just bought an Onan/Hobart generator welder for 100 bucks, spins over and has compression, but no spark. Upon pulling the flywheel off, from my experience it seems its missing the magneto alltogether. If anybody has any help at all, i/e where to get parts, schematics, manufacture dates, yada yada Please feel free to post it here. Now for the numbers that I know you guys and girls will ask for...
Onan-
Model- CCK-S 538E
S/N 49B607322
H/P 12.9 @ 2700 RPM
Hobart
Model-GO-2245
S/N AAW-28088


Please note that I have alot of mechanical experience as I grew up with tools and equiptment as toys in my fathers diesel shop/wrecker service. So alot of things wont need detailed explanations. Also if somebody knows the values of these both restored, and in good running condition, the years of what I have, blah blah that would be great... By the way, Thank you ahead of time
 
Is that a 2 cylinder opposed engine?? If yes on the left side towards the back should be a set of points which may well be where your problem is. I have an Onan engine 2 cylinder on my Lincoln welder and that is why I know about the points.
Going by your handle I am guessing you like pit bulls
 
Magneto? Are you sure it just isn't a battery ignition? Lots off CCK's had a pushrod operated set of points on the back of the engine (like Old says). There was a dual winding coil with wires to both plugs. The two plugs fired at the same time. One was on the compression stroke and one was on the exhaust stroke. Those points were troublesome, but there was an electronic conversion available at one time.
 
Ancient BMW????? BMW has pretty much used the same engine for decades. Ya they improve things a bit but all are the opposed 2 cylinder or at least all the ones I have been around have been. Sure wish I still had the R60S I had that my brother sold out from under me
 
Engine was made in April 1959. I can take your numbers and find the build sheet. Will tell what it left the factory with.Not all CCKs had magneto ignition.

Onan tech since 1980.
 
(quoted from post at 14:37:32 05/24/16) I just bought an Onan/Hobart generator welder for 100 bucks, spins over and has compression, but no spark. Upon pulling the flywheel off, from my experience it seems its missing the magneto alltogether. If anybody has any help at all, i/e where to get parts, schematics, manufacture dates, yada yada Please feel free to post it here. Now for the numbers that I know you guys and girls will ask for...
Onan-
Model- CCK-S 538E
S/N 49B607322
H/P 12.9 @ 2700 RPM
Hobart
Model-GO-2245
S/N AAW-28088


Please note that I have alot of mechanical experience as I grew up with tools and equiptment as toys in my fathers diesel shop/wrecker service. So alot of things wont need detailed explanations. Also if somebody knows the values of these both restored, and in good running condition, the years of what I have, blah blah that would be great... By the way, Thank you ahead of time
 
Yes, it is a 2 cylinder, and it has points and a pushrod, that activates them. I assumed the magneto split the spark in the coil, as I did not realize it fired at exhaust/compresion stroke. Hence the reason Im here, lol. So how do I test the coil to assure it has whats needed, (assuming its an intermitant hot supplied by the points, and a neg, followed by spark to plugs)... Also yes, I have a Pit, whom I love, and is broof that if you show me a sdog that bites, I will show you an owner who does not know how to properly raise a dog. That said Thank you all
 
On the Onan engine I have any time I have a spark problem it has always been the points needing cleaned or replaced. Those coils are almost bullet proof.
On the pit bulls I have own many and yet to have one that ever bit let alone caused any problems
 
Ok, here is some info that may help anybody whom has 1 of these engines. I went into the Cummins dealer, and bought a set of points and condenser for the project, and upon doing so, I asked the cummins parts service guy if he had any info on it I could get. He printed this up, as well as emailed it to me for a whole 6 bucks... Well worth it to me... Maybe this will save somebody the 6 bucks and help answer questions they may have.... Well, for whatever reason I can not figure out how to upload a pdf file... Any help on that, and I will be glad to put it here.
 
Contact Robert Kummer aka Boomers Influence
[email protected]
651-437-2826
M-F 10-7
S-S 12-6

Forget Cummins and disregard most but not all of the advise here.

Boomer is the Onan expert and very helpful.
 
I have been with Onan since 1980. I agree talking to Cummins would be a waste of time. They have very few if any knowledge of the Onan product. From back when it was Onan. boomer would be my choice of a person to talk to.Us old Onan guys are getting hard to find.
 
More often than not, I would probably agree with you, however the info I was given is a complete parts list, and service manual issued by Onan in 1959, in pdf format. So this is 1 of those times I would disagree about the guy not knowing what he was talking about.... Every so often you meet 1 parts guy, who actualy knows his stuff. In the last 10 years, I have met 100s of parts guys, 2 of which were ex mechanics, and Ironically they were extremely helpful...
 
Allright, bought a new set of points, condenser, plugs, and a new starter (the old 1 was rusted into a locked up position). Poured some tranny fluid down the carb (trick I learned at my fathers junkyard for getting those valves moving and seating after sitting up a while) and busted her off... She purrs like a kitten, now for the next problem, seems even though the motor purrs wonderfully, I have no power coming out of the generator plug ins... Anybody haave a step by step diagnostic tree for a resolution.
 
TY I will contact him if I need to, but I dont want to call somebody if I dont have too, hoping I can research and ask questions to people whom are offering thier wisdom already. However, duly noted
 
If you have found a Cummins man willing to help. Stick with him they are rare.

You need to check the slip rings and brushes. The rings may have glazed over from sitting so long. Some fine sand paper will work or scrubbing pad.
But don't use anything with metal in it. Contact cleaner will also work.Brushes should be free in the guides and make good contact with the rings.
Check for fuses as some units do have them in the control system.I would also check for chewed up wires.There is an old trick with a drill. Start it
up plug the drill into the outlet. Pull the trigger and spin the chuck by hand. Some times this will flash the fields and restore system.
 
(quoted from post at 01:52:34 05/29/16) If you have found a Cummins man willing to help. Stick with him they are rare.

You need to check the slip rings and brushes. The rings may have glazed over from sitting so long. Some fine sand paper will work or scrubbing pad.
But don't use anything with metal in it. Contact cleaner will also work.Brushes should be free in the guides and make good contact with the rings.
Check for fuses as some units do have them in the control system.I would also check for chewed up wires.There is an old trick with a drill. Start it
up plug the drill into the outlet. Pull the trigger and spin the chuck by hand. Some times this will flash the fields and restore system.
Billy, I took all the casing off of the unit, and located no fuses or breakers, the brushes all seem to be moving freely upon moving the spring that holds them in place, and the slip ring apears to be clean, although I will try to clean them with some emmry cloth later today or tommorow. That said, do you have access to any schematic that may tell me what wires are supposed to have what, coming out of the generator itself. Thanks a ton
 
Oh, also, if anybody knows who the generator is made by, was it supplied by Onan, or by Hobart, or somebody else alltogether, because I see no tags to identify the generator, just the motor, and welder. So I am sort of at a stand still.
 
I have been unable to find anything on line. So I sent a request off to Hobart. I will also check with the local welders I know. They may have one
sitting around I could check out. As far as I know the welder section is all Hobart. I will let you know what I find.
 
1st, Billy, thanks a ton, that schematic is spot on, as well as extremely interesting from a priceline perspective...


Now, Does anybody know the exact method of flashing the fields on this model generator/welder. I studied the schematic Billy sent me, and alot of things in the schematic are a learning curve for me. As I understand dc voltage pretty well, however ac voltage, and the various things in the schematic, not very well, i/e shunt, rectifier, blah blah. I disconnected every wire coming out of the actual generator (which consisted of 5 wires) a green coming off the slip ring, going to the (?) transformer, also a red from the other slip ring going to the other side of the (?) transformer, as well as a green thatwas going to the negative side of the welding lead hookup, a red that was going to the reactor, as well as a white wire that was going to what I am assuming is the shunt side of reactor. I did his in an atempt to isolate the generator from everything else. Upon doing so, I took a continuity tester, and checked continuity at all locations just to see what I have, seems I have continuity between the wires that were hooked to the - side of the welder, and the wire that was connected to the reactor series, where as I do not have continuity to the wires that come off the slip rings that orriginaly went to the transformer. Is this normal, or should it be different, also, I have 0 ac/dc voltage coming out of anything... So what your advice on my next move...
 
Take the field leads out of the system. Hook a Negative wire from a battery to the negative field wire. Then take a Positive wire to the positive
wire. Just tap the positive field wire. Don't hold it on for long just a quick tap.This should restore the fields.
 

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