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Discussion Forum

H oil burner

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07-04-2001 21:42:48

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Picked up a 46 H w/loader for $750. blows some smoke when she runs a while.Starts great, and seems to have decent compression. Head is off, gasket was leaking. Pulled out pistons, comp rings are like new. Cyl. walls are smooth as glass, but oil rings are not expanded out of the grooves in the piston. It has about .050" piston slop in each cyl. I need the tractor running and I plan on making it look respectable, but i really dont want to put in sleeve kit. What is normal for piston slop? How should the oil rings look? Is this where the oil is probably getting into the cyl. Every thing else in the motor is near perfect, I need some advice from some of you who have been there and done that. thanks

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07-05-2001 06:10:56

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 Re: H oil burner in reply to DaveZ, 07-04-2001 21:42:48  
I had an old Ford truck that was using about a quart of oil every 50 miles. I had the pistons and head reworked at a machine shop, honed the cylinder walls, new rings and all was OK after that. If your wrist pins arnt worn, maybe you can fix yourself up with new rings and honing the cylinder walls.

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The Red

07-05-2001 04:40:42

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 Re: H oil burner in reply to DaveZ, 07-04-2001 21:42:48  
Dave if you could wiggle those pistons in the sleeves, those rings are worn. They might look good but are worn. The oil scraper ring should have a distinct U shape when new. The U flattens out with time. My experience has been that the oil scraper ring wears out before the compression rings.

The H service manual I have reads ring gap of .010-.020.

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07-05-2001 08:24:38

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 Re: Re: H oil burner in reply to The Red, 07-05-2001 04:40:42  
Thanks for the advice guys. I'm hoping that will solve the problem. The tractor has new tires, perfect sheetmetal, and is really in good shape. After the motor all i need to do is replace a leaking seal for the lift all drive, add a missing generator, tstat and paint it, all ready changing fluids. I'll try to post a picture when i'm all done

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The Red

07-05-2001 08:48:24

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 Re: Re: Re: H oil burner in reply to DaveZ, 07-05-2001 08:24:38  
How did the rod bearings look?

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07-05-2001 10:25:14

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 Re: Re: Re: Re: H oil burner in reply to The Red, 07-05-2001 08:48:24  
Red, the rod bearings look pretty good. I will use platigage to make sure they are in spec What are your recommedations

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The Red

07-05-2001 11:17:10

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 Re: Re: Re: Re: Re: H oil burner in reply to DaveZ, 07-05-2001 10:25:14  
Usually if I replace the rings, I go ahead and replace the rod bearings. Its a tossup whether you need to replace the mains. If the oil pressure has been good, I wouldn't worry about them.

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