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RE ENGINE

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D-17 Dave

12-18-2001 17:00:04




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I got the blocks off but the damage is already been done. 2 pistons came right out but the other 2 are rusted through too the cooling jacket. So now I guese I need 2 pistons and 2 blocks. Are these hard to come by or are they readily availiable? Does any other equipment use this engine, or just the ZT's? I'm a pretty fair mechanic, and are familiare with most Allis stuff, but these M&M's are pretty tractors and there aren't too many around here. Any info such as the valve tricks you fellows told me about were VERY helpful. And I need all the help I can get. There are tooooo many red tractors aroun here so I need something to break up this color problem.

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Dave

12-20-2001 18:58:59




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 Re: RE ENGINE in reply to D-17 Dave, 12-18-2001 17:00:04  
I am currently restoring a ZTU and I bought a parts engine.I have about all I need off of it and would probably sell some parts if you cant find any.I usually free up a stuck engine with diesel fuel down the cylinders and then use compressed air through the plug holes to force the fuel down around the pistons.This works pretty well and is safer than grease gun pressure.



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Kelvin

12-20-2001 19:24:43




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 Re: Re: RE ENGINE in reply to Dave, 12-20-2001 18:58:59  
If you have those cylinder blocks off and try air, and it moves, those pistons could come outta there like a rocket!



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galen

12-18-2001 20:58:39




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 Re: RE ENGINE in reply to D-17 Dave, 12-18-2001 17:00:04  
Blocks aren't to hard to come by nor pistons. Check around on prices. Her is the phone number of my parts man 660-222-3371. He has several of these old blocks around. specify what you want as far as condition. He has used pistons or can get new.



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Kelvin

12-18-2001 18:55:09




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 Re: RE ENGINE in reply to D-17 Dave, 12-18-2001 17:00:04  
Here's how I've got them apart.
soak the pistons, top and bottom, as long as you can with your favorite rust buster.
grind the valves and seats and put them back in, springs and all.
pack as much grease in the cylinders as you can in the cylinders and put the head gasket and head back on.
Then rig up some way to put a grease fitting in the spark plug hole i use an "air hold" adapter (for removing the valve springs with the head still on an engine) with a fitting threaded into it.
force grease in the cylinder with a hand grease gun. It took 10 lb to do an entire engine.
For me, this has always brought the pistons out.

However, Someone has warned me that there is a possibility of bursting the block, with injurous consequences.

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answer

12-18-2001 23:53:55




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 Re: Re: RE ENGINE in reply to Kelvin, 12-18-2001 18:55:09  
Yes the grease gun trick is dangerous. A grease gun will make around 1500 to 2000 psi depending on the guy grunting on it. The 2000 psi is focused on each square inch of the cylinder. If there were 5 square inches inside the cylinder that would make 10000 lbs. of force in there. Plenty to make shrapnel everywhere. Be careful. Don't grunt too hard on the grease gun.



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