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911 for my 706

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whtpark01

08-01-2005 14:08:59

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my 706 has lost the rings in #4 cylinder, gotta get it going FAST. Is it possible to drop the oil pan, pull one piston out of the bottom and re-ring it? I need it to finish haying, probably 30 hours of run time, then I will do a complete overhaul.

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andy r

08-01-2005 21:21:27

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Re: 911 for my 706 in reply to whtpark01, 08-01-2005 14:08:59

I lost a cylinder in my 706 gas once too. It was a burnt valve. I planted 60 acres with it that way. Of course it didn't have all of it's power but it got the job done. I left the spark plug in. If all of your cylinders are burning oil switch to Champion D21 spark plugs. They seem to keep firing pretty well. My oil rings (3 piece) had worn down. Still had good compression and scraper rings. Oil burning probably caused the valve to burn due to deposites building and holding valve open. The time it takes to rebuild one cylinder isn't that much less than the entire tractor. In frame overhaul maybe enough. Mains and rod bearings are cheap. Main bearings can be "rolled" in. That vintage of gas engine seem to be hard on valves ... so a trip to the machine shop for teardown and valve grind might be a good idea. Very simple engine to do an inframe overhaul on. Yes, the piston needs to come out of the top. Goodluck.

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Kelly C

08-01-2005 22:34:34

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Re: 911 for my 706 in reply to andy r, 08-01-2005 21:21:27

Please explain rolled in when refering to the main bearings? Picked up a complete rebuild kit for my 706 today so will be starting soon.

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Allan in NE

08-02-2005 03:36:33

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Re: 911 for my 706 in reply to Kelly C, 08-01-2005 22:34:34

Hi Kelly,

He is talking about when doing an engine "in frame".

That top main bearing shell (and crank) can be rolled and the shell half slid up into place by using the crankshaft itself.

I've heard of guys cutting off a nail about an inch from the head and placing it in the oil feed hole. Turn the crank and that nail head will push against the bearing shell until it is up into position.

Usually tho, if a guy just loosens all the main bolts, it will allow enough clearance that the shells can just be pushed up into place by hand.

Allan

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the tractor vet

08-01-2005 18:03:09

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Re: 911 for my 706 in reply to whtpark01, 08-01-2005 14:08:59

The head must come off but to do that ya must raise the fuel tank up atleast 4 inches and if ya think you lost your rings I don't think so i would lay odds that you sucked the sleeve and if ya did then you are in for and engine removal and boring the block and installing a repair sleeve and then boreing it and installing the new sleeve and piston. Now if it just all of a sudden developed a miss then i would have to say ya ate and exhaust valve. Does it have a knock ????? if no Knock then valve.

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whtpark01

08-02-2005 05:27:58

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Re: 911 for my 706 in reply to the tractor vet, 08-01-2005 18:03:09

thanks to all for the advice, looks I will open her up and see what is left in there. the tractor-jock I bought it from was supposed to have done the valves, at least he waited 2 weeks to deliver it while he said he did the valve job. I havent even got 50 hours on it since it was delivered 10 months ago.

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Allan in NE

08-01-2005 15:48:11

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Re: 911 for my 706 in reply to whtpark01, 08-01-2005 14:08:59

Hi,

What in the world makes you think you "lost the rings" on a cylinder? Never heard of such a thing.

Do you mean that it has burnt a piston and is foggin' oil?

Allan

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T_Bone

08-01-2005 15:29:42

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Re: 911 for my 706 in reply to whtpark01, 08-01-2005 14:08:59

Hi whtpark,

Why can't you just continue using it until rebuild time? Sure it's going to use some oil and be down in power but with the spark plug out it should miss but still run decent.

If the cylinder is all tore up then it will just continue to make a mess inside maybe twisting/breaking a rod, cracking a block/head, etc.

Pull the head, install a new ring, use the old head gasket with sealer, about 6hrs, should make 50hrs of run time easy.

T_Bone

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Aces

08-01-2005 15:25:49

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Re: 911 for my 706 in reply to whtpark01, 08-01-2005 14:08:59

EL is right have to go out the top.

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El Toro

08-01-2005 14:48:08

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Re: 911 for my 706 in reply to whtpark01, 08-01-2005 14:08:59

The older farmalls had this feature, but I think you will need to pull the head. You need to inspect that sleeve for a groove from the broken
ring. Sometimes when the rod bearing is worn will
allow the ring to hit that ridge at the top of of the ring travel. Usually requires a ridge reamer to remove it so the piston can be removed without damaging it. Hal

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RustyFarmall

08-01-2005 14:28:48

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Re: 911 for my 706 in reply to whtpark01, 08-01-2005 14:08:59

Never been into a 706, gas or diesel, but I really don't think you will ever get the piston to clear the crank shaft.

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Price Co. Hunter

08-01-2005 14:17:12

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Re: 911 for my 706 in reply to whtpark01, 08-01-2005 14:08:59

I don"t know the answer to this, but to save you some time, those who do know will first want to know if you have a gas or diesel.

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whtpark01

08-01-2005 14:49:06

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Re: 911 for my 706 in reply to Price Co. Hunter, 08-01-2005 14:17:12

forgot its a 263 gasser

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