720 diesel help

franknpdl · Mar 22, 2015

got a 720 diesel with rebuilt engine, ran fine for about 2 weeks. Then started slobbering out of the exhaust pipe, it was so bad that it was dripping out at the manifold and the exhaust pipe onto the frame. We had the injector pumps and nozzles rebuilt that helped some but is still a big issue.
any ideals what to check next?

Thanks in advance,
franknpdl

cole in mo. · Mar 22, 2015

The engine may not have been broke in, hook it to something way more than its sopposed to pull for a day.

franknpdl · Mar 22, 2015

The guy I got it from said he put about 10 hours on it before I got it, and I have put at least 10 hours on it myself. I disked up my garden as well as my nephew's. Did not help slobbered all over me and clothes.

wilamayb · Mar 22, 2015

Does it have a working thermostat? If not its gotta have one. Get it out and work it hard for a few hours after you replace the stat and see if it clears up. If not you're in for a rebuild.

franknpdl · Mar 22, 2015

That's what we are afraid of, just wanted to check to see if there was something I may have missed.

Thanks

MT RON · Mar 22, 2015

I had the same thing with an R,wet stacking,blowing raw fuel out the stack always looked like I had the measles.Got another set of pumps and that ended the problem.I was told all kinds of things including needing the engine rebuilt.Just my nickles worth.You might take those pumps to someone else just to have them checked,maybe they never touched them.Ron

Kent Petersen · Mar 23, 2015

there are no stats in an R they had shutters from the factory

wilamayb · Mar 23, 2015

For sure. I think this fellow has a 720 though..

IAfarmguy · Mar 23, 2015

(quoted from post at 17:22:19 03/22/15) got a 720 diesel with rebuilt engine, ran fine for about 2 weeks. Then started slobbering out of the exhaust pipe, it was so bad that it was dripping out at the manifold and the exhaust pipe onto the frame. We had the injector pumps and nozzles rebuilt that helped some but is still a big issue.
any ideals what to check next?

Thanks in advance,
franknpdl

New to posting here. Occasional reader. Regarding your slobbering 720 diesel, are you sure it is fuel coming out? My 720 has done that a couple times and it has been the head gasket. After the most recent episode I pulled the head and had it all checked by a reputable cylinder head shop. No cracks but they trued up the surface a bit. Reinstalled and good so far. Try opening the radiator cap with tractor running and see whether water is simply circulating as normal or bubbling/splashing due to cylinder pressure entering water jacket. Obviously if it's bad enough there would be water in the crankcase too. BTW, the first time we pulled the head, installed a new gasket and reassembled. Lasted several years.

Mike Aylward · Mar 23, 2015

With the small amount of time on the engine the thing to do is pull the snot out of it and get it good and warm. Take it to someone with a dyno and put it to work for several hours or better yet, work it in the field somewhere. The wet stacking should stop. If you are only going to use it easy like you have been it will never get better, regardless of anything else you do to it. Also, with the engine not broken in it would be good to get some break-in oil for the first several hours of working the tractor. That will let the rings seat quicker. If the tractor has a high quality oil in it the rings will likely never seat. The oil simply does too good of a job of lubricating to allow that. Mike

buickanddeere · Mar 23, 2015

Sometimes a complete overhaul consists of a set of rings, a gasket set and a suction cup on a stick.

ss55 · Mar 24, 2015

OK I'll bite, what is the suction cup on a stick for?

Bob · Mar 24, 2015

.
EXPERT????????

buickanddeere · Mar 24, 2015

Valve job.

720 diesel help

franknpdl

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cole in mo.

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franknpdl

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wilamayb

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franknpdl

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MT RON

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Kent Petersen

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wilamayb

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IAfarmguy

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Mike Aylward

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buickanddeere

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ss55

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Bob

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buickanddeere

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