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Re: 706 overhaul
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Posted by Big Jim on November 06, 2001 at 14:58:34 from (199.150.177.187):
In Reply to: 706 overhaul posted by vinny on November 06, 2001 at 13:27:58:
Step one: get a shop manual. Then it depends on the problem. I assume the reason you want to overhaul the tractor is because of loss of power and oil consumption. Oil can be lost two ways (besides leaks), it either is lost past the valve guides or past the rings, or both. This would require, at a minimum, taking the head to a machine shop for a thorough check and rebuild, and new set of piston rings (the cylinders will need to honed prior to putting in new rings). You will need to measure the cylinders for taper and out of roundness, otherwise just throwing rings in the tractor will be a total waste of money. If the cylinders don't meet specs, then the tractor will need new sleeves, pistons, and rings. Another factor to consider in loss of power is a possible weak injector pump. The old one will need to be removed and taken to a diesel shop for a thorough check. The engine will need to be retimed to reinstall a rebuilt pump.
Also if the tractor smokes and misses, you may need new injectors. The old ones need need to be taken to a diesel service place and the spray pattern tested to determine if they are any good. Is the oil pressure OK? If not, then you will need to look at the oil pump, and bearings. Well, enough of this as space is limited. If you have absolutely no engine experience, you are probably in over your head, especially with a diesel engine.
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