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John Deere Tractors Discussion Forum
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70 question

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troubles

09-18-2004 16:49:29




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I was wondering if there is a trick to instaling the lower water pipe on a 70 diesel , I put in new o-rings on both ends but it still leaks I just used soap to push the pipe in. any tips would be appreciated. thanks




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JDG

09-18-2004 21:56:43




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 Re: 70 question in reply to troubles, 09-18-2004 16:49:29  
Had same trouble with a "G".I took water pump off and housing off head. Assemble off tractor pushing pipe together far enough to get water pump and housing to head gaskets in. No leaks!!!



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PeteNY

09-18-2004 20:12:34




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 Re: 70 question in reply to troubles, 09-18-2004 16:49:29  
One of the most frustrating and repeated steps in our rebuild...finally bought 6 o rings, used dish soap and the 4th one(5th try 'cause I only had one the 1st time) didn't get cut...great tractor though! Pete



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Jimmy

09-18-2004 18:44:19




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 John Deere 1947 M in reply to troubles, 09-18-2004 16:49:29  
Seeking information on transmission and rear axle noise for a John Deere Model M 1947.



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F-I-T

09-18-2004 17:22:36




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 Re: 70 question in reply to troubles, 09-18-2004 16:49:29  
Troubles:

Assuming that your pipe is straight and smooth and without defects (at my age I can only hope that is the case) I'd guess that you cut or rolled one of the o-rings.

I did a front to back rebuild project on my 70 Diesel a year or so ago, and after all the work I performed, getting those o-rings in was one of the most difficult jobs I had to do. Whenever I do one, I have 3 or 4 extra o-rings on hand to save myself a trip to town.

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Now for the tip....

09-18-2004 17:26:54




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 Re: 70 question in reply to F-I-T, 09-18-2004 17:22:36  
I cut 4, 1/2" wide strips out of a lacquer thinner can, filed off the burrs, and laid those in the throat of the casting so the o-ring was trapped in the groove. Then I slid the well lubricated pipe into place. Then I pulled the strips back out and had no leaks on either pipe, upper or lower. The strips keep the o-ring from rolling out of the groove as you push in the pipe.

Frank



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Mike M

09-18-2004 18:18:17




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 Re: 70 question in reply to Now for the tip...., 09-18-2004 17:26:54  
Here's a better tip for you. I use RTV gasket maker smear all over the o-rings before installation then put a little on the pipe to fill in the pits. That silicone RTV really helps them slide into place then when dry fills in the pits and seals.



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troubles

09-20-2004 07:05:27




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 Re: 70 question in reply to Mike M, 09-18-2004 18:18:17  
thanks for all the tips on the water pipe , it sounds like im not the only one that has had a little problem with the leaking. this site is great for answering any question that comes up



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