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Tractor Talk Discussion Forum

Pistons and Jugs

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bill from scotland

11-27-2011 01:56:21

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When replacing pistons or rings how do you guys do it on something like a MM 705? Do you remove the oil pan, fit the jugs and put the pistons in from the top or do you lower the jugs onto the pistons while still attached to the crank? I think it would be possible to lower the jugs onto the pistons and much quicker but much more likely to break rings. Is there a piece of equipment you can use to compress the rings as you lower the jugs, I have one the works if you are lowering the pistons but doesnt split for removal if done the other way. I did think it would be possible to turn the crank until both pistons were the same height, jamb them somehow, put electrical tie straps around each ring to compress them then gently lower the jugs. Virtually none of our engines have removable jugs in Scotland.
Any better ideas welcome.

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11-27-2011 09:29:23

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 Re: Pistons and Jugs in reply to bill from scotland, 11-27-2011 01:56:21  
you can lower jugs onto pistons...its same principle as re-ringing a Harley...normal ring compressor wont work...i use however many hose clamps it takes to go around piston/rings and tighten them so they compress rings and barely touch pistons...pour some light oil over rings and oil cylinders...put jug on and tap it with a lead or rubber hammer to slide jug over piston...once rings are inside,remove hose clamps...a helper would come in handy since the jugs youre filling are a wee bit heavier than the ones on my Harley...good luck
ps: Harley jugs are chamfered on the bottom for easier ring insertion...if the MM jugs arent,you need to grind about a 1/4" chamfer on bottom of cylinders.

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11-27-2011 03:43:36

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 Re: Pistons and Jugs in reply to bill from scotland, 11-27-2011 01:56:21  
I would assemble pistons in jugs using a standard ring compresser. To protect the crank during assembly slide some rubber hose over the rod bolts and let them down gently. A helper to line things up might be good. Good luck As to the other reply I have Molines, Cats, Case, Deere, and AC also some old trucks pay no attention to him.

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11-27-2011 05:24:40

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 Re: Pistons and Jugs in reply to ssss, 11-27-2011 03:43:36  
WHAT'S YOUR PROBLEM WITH BILL? Ever wonder what the little "symbol" is aphter the word 'here" and the period in his post? What's wrong with asking on the Minnie-Moline board?

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11-28-2011 03:24:05

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 Re: Pistons and Jugs in reply to thurlow, 11-27-2011 05:24:40  
was poking some fun back at Bill was very careful not to say anything bad sorry to have offended. The End

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11-27-2011 16:23:31

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 Re: Pistons and Jugs in reply to thurlow, 11-27-2011 05:24:40  
You know, after reading these posts I have a mind to post something that will really get these guys little thongs all tied in knots.(;>))

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Fritz Maurer

11-27-2011 05:57:14

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 Re: Pistons and Jugs in reply to thurlow, 11-27-2011 05:24:40  
What's wrong with asking about tractors on Tractor Talk? Is M-M off limits? Minneapolis-Moline is a former model, posted on Yesterday's Tractors...he couldn't have met more criteria. Boy, you guys really know how to make a guy feel welcome.

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cold beer

11-27-2011 08:04:27

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 Re: Pistons and Jugs in reply to Fritz Maurer, 11-27-2011 05:57:14  
Ain't that the truth, a guy asks a serious question and it gets turned into a peein contest.

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11-27-2011 03:22:25

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 Re: Pistons and Jugs in reply to bill from scotland, 11-27-2011 01:56:21  
Most of the experts on this will probably be found on the Minn. Moline board. A lot of them would not "soil" themselves by posting over here. (;>))

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