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Onan 4.0 CCK?


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  #1  
Old 05-13-2015, 05:06:13 PM
Chas183 Chas183 is offline
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Default Onan 4.0 CCK?

Picked up what I think is a CCK 4.0 120/240 generator. Can someone help in looking the serial up to see exactly what I got?
It also has the pulley on back of armature to possibly drive a pump.
The number next to the points box is 764217 also has 19 degrees.

How do you get the pulley shaft off to replace the armature support bearing?

Thanks,
chas183
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Old 05-13-2015, 05:53:47 PM
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Billy J Shafer Billy J Shafer is offline
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Default Re: Onan 4.0 CCK ??

If it has a cast iron block. It is a CCK. Pully probably has some set screws locking it to the shaft. Losen them and use a puller to get it off.
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Old 05-13-2015, 07:37:10 PM
Chas183 Chas183 is offline
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Default Re: Onan 4.0 CCK ??

Got the pulley off. How does this shaft come apart?
It does have a cast iron block. It threw a rod.
Looks like the unit was ran low on oil. The cylinder still has hone marks from the rebuild. It's currently .010 over on the bore.
Do the rods have a marking indicating oversize?


chas183
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Old 05-13-2015, 08:50:41 PM
Ed Stoller Ed Stoller is offline
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Default Re: Onan 4.0 CCK ??

We do have manuals for the unit. The rod P/N is 114-0098 with a -10,-20 or -30 for undersize. I restored a 5CCK last winter and Kelly Pack provided a lot of the parts.
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Old 05-13-2015, 09:07:14 PM
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Billy J Shafer Billy J Shafer is offline
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Default Re: Onan 4.0 CCK ??

If I remember. The shaft has set screws in it. Bolting it to the main shaft.
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Old 05-14-2015, 07:27:46 AM
Kpack
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Default Re: Onan 4.0 CCK?

What's the full model number and spec letter and a email so we can send you the right service manual.
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Old 05-14-2015, 02:56:29 PM
Chas183 Chas183 is offline
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Photo Re: Onan 4.0 CCK?

I don't see any set screws or Allen screws to remove. Is it possible that it is threaded/tapered?
The threaded holes held the cooling fan in place.

I only have the stamped numbers. See photo.

The name plate had been removed before I got it.
Thanks for the help guys.

Chas183

EMAIL schell183 at msn dot com
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Old 05-14-2015, 03:32:01 PM
Kpack
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Default Re: Onan 4.0 CCK?

We need the numbers and letter after 4cck on the data plate to get you the right manual. The service manual should tell you how to do it . I just pulled a 4 cck spec R the other day but that one is different that's why we need the spec letter.
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Old 05-14-2015, 03:55:09 PM
Dave Edmonds Dave Edmonds is offline
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Smile Re: Onan 4.0 CCK?

Just a thought - -

Most Onan's have a shaft that extends all the way through the armature and screws into the motor shaft. There is a nut and washer on the genend end of that shaft. The purpose of the shaft is to keep the armature and the motor shaft together, since there is a tapered shaft on the motor. Is it possible that this shaft is threaded onto that shaft instead of the nut? Or, is this shaft and the one that extends through the armature all one piece? It may simply "unscrew", but don't find out the hard way that it doesn't - - -.

Bottom line - what you have is not a common configuration; hopefully, one of the Resident Smart Guys has seen this setup before, and knows how it comes apart.

Dave Edmonds
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Old 05-14-2015, 04:10:37 PM
Radarman Radarman is offline
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Default Re: Onan 4.0 CCK?

Try posting a picture of the entire generator including the control box above the generator head. Additionally, if you can send a picture of the output wires from the generator, those both would help us identify the rough vintage and spec number.
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