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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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My 770 lives!!!

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cmccoy7

10-29-2007 08:42:42




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It's alive! I am just bustin out with pride and joy. I rebuilt my 770 and restored everything. It is now completely done and I am thrilled. I had never heard a 770 run nor had I seen one in action. I have now driven my 770 and moved around my property a little and it is awesome! Thanks to all of you for the advice and tips, very much appreciated. I do have one question left... The manual talks about a break in for the new motor. Any other tips or just follow the book by the letter? Chris

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cmccoy

10-30-2007 10:30:24




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 Re: My 770 lives!!! in reply to cmccoy7, 10-29-2007 08:42:42  
Thanks for the tip, I can do some of what you have mentioned here with the hills. My engine is gas and it purrs. I am thrilled, I will get home today and start the break in! Funny how excited I am over something so silly but I just love the way this tractor went together. Chris



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Kruse

10-29-2007 16:29:14




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 Re: My 770 lives!!! in reply to cmccoy7, 10-29-2007 08:42:42  
I have a method for engine break-in on a small tractor. I"m sure other people have a different one....but here goes:
Since I don"t have access to a dyno, I put a weighted trailer (a hay trailer full of square bales works great) behind the tractor and drive on a hilly road. One of the first things you will need to do is to seat the piston rings. Drive your tractor and trailer up a hill in a higher gear and make sure to slightly load the engine and open up the throttle. The extra cylinder pressure will put pressure behind the top rings and push harder against th cylinder wall. After this, coast down the hill with the throttle fully closed. This will increase the vacuum in the intake and allow the piston to suck up some oil into the rings to keep them lubed. Do this cycle for about an hour or so.
Change the oil after an hour and put on a new good quality filter. 15W-40 diesel motor oil is probably still the best oil to use after it has broke in. This method is for a gas. Diesel engines need a good load to break in the engine. What do you have?
I am a mechanic, but have an open mind. Anybody care to differ on this?

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