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 4.0 CCK Spec V


this thread has 22 replies and has been viewed 704 times

Reply
 
Thread Tools Display Modes
  #11  
Old 09-19-2017, 06:55:56 AM
reid070 reid070 is offline
Registered-I
 
Join Date: Dec 2015
Location: Wentworth, Nova Scotia, Canada
Posts: 78
Thanks: 101
Thanked 22 Times in 14 Posts
Default Re: Onan 4.0 CCK Spec V

Quote:
Originally Posted by slip knot View Post
that's a pretty clean set. I'm jealous.
Yes it's in great shape, I couldn't say no to this one. Pretty unusual for around here, great shape and a reasonable price. Surprisingly it sat on Kijiji for 3 weeks while I was away at work with only 1 other caller who never called back! Lucky for me.
Seller is retired electrician who removed it for a customer ( they replaced it with a new kohler). He said it spent its life in a heated building connected to a transfer switch, so not likely many hours.

Steve
Reply With Quote
Sponsored Links
  #12  
Old 09-19-2017, 08:26:28 PM
reid070 reid070 is offline
Registered-I
 
Join Date: Dec 2015
Location: Wentworth, Nova Scotia, Canada
Posts: 78
Thanks: 101
Thanked 22 Times in 14 Posts
Default Re: Onan 4.0 CCK Spec V

Ran set for awhile today , charging voltage settled down to 13.8volts so looks like that's working ok. Oil leak looks to be coming from piviot pin on fuel pump. Pin was sticking out 1 side ,pushed it back in flush still leaking though. I was able to get a wrench on 1 of the mounting bolts ,it was snug.
Any of the manuals and wiring diagrams I've been able to grab only go to spec u. I can't find anything that mentions spec v?or is there no real difference ?
Thanks Steve
Reply With Quote
  #13  
Old 09-19-2017, 11:19:15 PM
Motorhead's Avatar
Motorhead Motorhead is offline
Subscriber
 
Join Date: May 2007
Location: Central Coast, California
Posts: 3,580
Thanks: 1,648
Thanked 2,434 Times in 1,284 Posts
Default Re: Onan 4.0 CCK Spec V

With the fuel pump pin in proper place, get a small center punch and stake around the aluminum to hold the pin in place. Clean around the pin and casting with some lacquer thinner and let dry. Put some silicone sealer around the pin and let it set up for a day or two. should stop or at least slow it down.
__________________
Back of 1958 5CCK
Contractors model
On trailer owned by
"Ma" Bell.
Reply With Quote
The Following User Says Thank You to Motorhead For This Post:
  #14  
Old 09-20-2017, 11:34:34 AM
MBB MBB is offline
Registered-III
 
Join Date: Apr 2009
Location: Elk Grove Village IL USA
Posts: 3,163
Thanks: 1,373
Thanked 2,593 Times in 1,348 Posts
Default Re: Onan 4.0 CCK Spec V

Regarding manuals the index lists those manuals for spec v also. I would say then little difference.
Reply With Quote
The Following User Says Thank You to MBB For This Post:
  #15  
Old 09-23-2017, 07:24:49 PM
reid070 reid070 is offline
Registered-I
 
Join Date: Dec 2015
Location: Wentworth, Nova Scotia, Canada
Posts: 78
Thanks: 101
Thanked 22 Times in 14 Posts
Default Re: Onan 4.0 CCK Spec V

Had some time with this one today. Decided to do a compression test ,before I warmed up the set and changed the oil. Surprise ! 140 psi . I had recently read Johnnyc's thread on his former cck set and the debate about high comp heads. Looked at all the pic's I could find of the raised bump on the head that indicates high compression . Looking at my set ,nope no raised bump.
So... I had to know for sure , off with the heads. And they are absolutely high compression . And I found the raised area,but not in the spot shown in other threads. The raised area on my heads is on the top horizontal cooling fin almost out of sight under cooling tin. The pictures of other heads show the hump on the last vertical cooling fin near the plug.
Interesting stuff to me anyway, as I didn't think(from what I have read here) a tri fuel cck would have used the high compression heads.
The part #'s on the heads were170 0732 and 170 0733. An other thread by Kevin K shows these part #'s as ccka heads? Pretty sure this cck has never been apart before. I wonder does it show the type of head on a build sheet?
Steve

---------- Post added at 08:24:49 PM ---------- Previous post was at 08:11:14 PM ----------

Whoops sorry I screwed up those part #s should be 170 3071 and 170 3072.
Reply With Quote
  #16  
Old 09-23-2017, 07:32:44 PM
Kevin K Kevin K is offline
Registered-III
 
Join Date: Jan 2005
Location: upstate New York USA
Posts: 3,640
Thanks: 3,345
Thanked 3,731 Times in 1,991 Posts
Default Re: Onan 4.0 CCK Spec V

This should be your production order. Sometimes they used the older -3CR designation instead of the newer FJ.

Are you running on gasoline or propane? I tried a set of high compression heads on my gasoline fueled 5CCK and got readings of 145 to 150PSI. I thought that may be a bit high for our crappy ethanol gasoline, so I put the standard heads back on. I usually use non ethanol high test, but in a long duration power outage I am concerned it may not be available.
Attached Files
File Type: pdf 40CCK3CR8389V.pdf (26.2 KB, 6 views)
Reply With Quote
The Following 2 Users Say Thank You to Kevin K For This Post:
  #17  
Old 09-23-2017, 07:34:10 PM
reid070 reid070 is offline
Registered-I
 
Join Date: Dec 2015
Location: Wentworth, Nova Scotia, Canada
Posts: 78
Thanks: 101
Thanked 22 Times in 14 Posts
Default Re: Onan 4.0 CCK Spec V

In this picture from onan parts you can see the raised area where I was expecting to find it.
On mine it was instead (looking at the combustion chamber) on the top to the left of the spark plug hole. Also it was not nearly as pronounced .
Attached Thumbnails
Click image for larger version

Name:	ccklefthead1.jpg
Views:	21
Size:	104.1 KB
ID:	292024  
Reply With Quote
  #18  
Old 09-23-2017, 07:36:25 PM
Kevin K Kevin K is offline
Registered-III
 
Join Date: Jan 2005
Location: upstate New York USA
Posts: 3,640
Thanks: 3,345
Thanked 3,731 Times in 1,991 Posts
Default Re: Onan 4.0 CCK Spec V

I have one set of high compression heads without the raised area. Go figure...
Reply With Quote
  #19  
Old 09-23-2017, 07:40:51 PM
reid070 reid070 is offline
Registered-I
 
Join Date: Dec 2015
Location: Wentworth, Nova Scotia, Canada
Posts: 78
Thanks: 101
Thanked 22 Times in 14 Posts
Default Re: Onan 4.0 CCK Spec V

Thanks Kevin. I haven't tried it on gasoline yet , but I would like to be able to run it on gasoline. One of the thing I did today was set the timing back to 21 degrees , it was at something that didn't even line up with my timing marks (they stop at 22°) judging by the distance above the last mark it was probably >26°.
Steve
Reply With Quote
  #20  
Old 09-23-2017, 08:01:14 PM
Kevin K Kevin K is offline
Registered-III
 
Join Date: Jan 2005
Location: upstate New York USA
Posts: 3,640
Thanks: 3,345
Thanked 3,731 Times in 1,991 Posts
Default Re: Onan 4.0 CCK Spec V

Advancing the timing is a good idea when running on propane, a slower burning fuel. You have to make sure to set it back to standard before running on gasoline. Mark the original timing adjustment so you can reset it if needed. I think standard was 0.020" on the points, which gives you 19 degrees BTDC. The spark plug gap is listed as 0.018" on propane, and 0.025 inches on gasoline.
Reply With Quote
The Following User Says Thank You to Kevin K 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
Onan BGE spec N Kpack Onan Generators 2 09-20-2014 10:49:46 AM
Onan 6.5 NHE Spec. A alphasud Onan Generators 3 08-25-2013 11:51:18 PM
Onan AJ Spec S help Leeann Onan Generators 8 07-15-2012 05:25:09 PM
Onan 4. BGE spec E help please darrenholz Onan Generators 3 09-23-2011 09:11:09 PM
Re: ONAN CCK Spec R Help jecho Onan Generators 1 04-14-2011 08:15:16 PM


Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 12:20:25 AM.

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