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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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550 overhaul

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Hunter

10-07-2003 06:34:33




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Help please. Going to look @ a 550. Fellow says it needs a set of rings. Would I be able to roll a set of rod and main bearings in it without having to break the tractor in to? thanks




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Bob C.

10-08-2003 11:20:47




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 Re: 550 overhaul in reply to Hunter, 10-07-2003 06:34:33  
Check the tractor out thoroughly for leaks at the front and rear seals. Also check the clutch out and make sure its sound. If the seals arent leaking and the clutch isent poor, there is no need to split the tractor for a ring-bearing job. If the sleeves have a large carbon ring built up and need honing, than get a puller and remove them. A fresh set of O-rings are cheap and good insurance anyways and than you can do your honeing on the work bench. Its a lot of extra work to split the tractor and if you take your time and use care, it can be done good this way. If you did go ahead with this project, pay close attention to your valves when you take the head off. A new valve job on the four cylinder engines go a long ways on making them run smooth. Never a better time to do it. They are great tractors and if you did go through with this you wouldnt be sorry when it was done.

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Ollie

10-08-2003 07:46:29




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 Re: 550 overhaul in reply to Hunter, 10-07-2003 06:34:33  
The engine has to come out to machine the cylinders (hone, at least) for the new rings or they will never seat. In the "old days", some "mechanics" would attempt to hone the cylinders with the engine in place. This results in abrasive dust scattered throughout the engine. If you ever saw the work an engine builder goes through to remove all the dirt with the engine on a stand, you would understand.

There are no shortcuts to engine rebuilding. The old saying is "do it right or you get to do it over"!

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Brad

10-08-2003 15:20:30




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 Re: Re: 550 overhaul in reply to Ollie, 10-08-2003 07:46:29  
Ollie, the 550 is a wet sleeve engine and with a good piece of oak you can drive the sleeves out and install new ones or if you are very careful you can gently hold them in the vise and use a berry hone to deglaze them.



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Ollie

10-09-2003 11:18:10




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 Re: Re: Re: 550 overhaul in reply to Brad, 10-08-2003 15:20:30  
Yes, I know, but the correct procedure is to press sleeves out and in, not hammer on them. If you are going to hammer them out then you'll certainly hammer them in too. The vibration from doing so makes them loose in the cylinder case and can crack the sleeve.



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Bob C.

10-09-2003 15:14:09




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 Re: Re: Re: Re: 550 overhaul in reply to Ollie, 10-09-2003 11:18:10  
You should NEVER hammer a sleeve in or out. Use a puller to remove them and if you have a good O-ring seat on the block and your sleeve is cleaned up properly, i just like to put a nice layer of liquid dish washer soap around the rubber o rings on the sleeve and this allows it to slip into the block easily without damaging the rubber o-rings. They should just slip in that last inch or so with firm pressure from your hands.

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Brad

10-09-2003 14:58:40




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 Re: Re: Re: Re: 550 overhaul in reply to Ollie, 10-09-2003 11:18:10  
No, actually you don't hammer them in, you clean everything up real well with scotchbrite and brakleen then you install new o-rings with a little bit of silicone (the ONLY place I will ever use silicone) and then you push them in by hand.



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Brad

10-07-2003 17:08:26




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 Re: 550 overhaul in reply to Hunter, 10-07-2003 06:34:33  
You can easily re-ring a 550 without splitting the tractor. remove the fuel tank to get to the head, and the pan comes off very easily. If it carries good oil pressure when hot, new bearings are not a real necessity if you but them back in exactly where they came from.



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