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MM UTI Tractor

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Thomas Geiger

05-17-2002 23:03:10




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I recently purchased a Minnie UTI w/Reese Loader and factory cab. The unit sat for more than 10 years. We now have the unit running but have two problems. The shuttle shift won't allow us to engage the gears either forward or reverse when the unit is running. The only way we have been able to move it so far is by starting it in gear.
We also have a problem with back firing though the carburator. I thought that we may have a stuck intake valve. But I just noticed on a linked web sight that the firing order is 1-3-4-2 and I suspect that we have the firing order set at 1-2-4-3. If we have the wrong firing order, that would explain the backfiring. If anyone could help us out with one or both of these problems, it would be much appreciated.

Thanks!

Tom Geiger

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Tom Geiger

05-18-2002 20:45:14




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 Re: MM UTI Tractor in reply to Thomas Geiger, 05-17-2002 23:03:10  

Thanks for the info. Scott. That was my guess that the clutch wasn't releasing. In the past,on foot clutch models, I have been able to start them in gear, push the clutch in with a load on the unit and thus break the clutch loose. I am at a loss on how to accomplish this with a shuttle shift tractor with no foot clutch. There is another shaft, with a flat on it coming out of the transmisson near the shuttle shift. It's possible that it may be a clutch release mechanism for units with a foot clutch assembly. If that's the case, we could turn the shaft with an adjustable wrench, disengage the clutch and accomplish what I mentioned above. Any ideas?

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Jim Parisot

05-19-2002 07:44:08




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 Re: Re: MM UTI Tractor in reply to Tom Geiger, 05-18-2002 20:45:14  
Tom,

If your tractor has the shuttle shift then it is a UTIL, UTI's did not have that feature. Reading your first post I couldn't figure what your problem was, but after reading the second one it is apparent that you are simply missing your foot clutch pedal and linkage. All the UTI's and UTIL's had a foot clutch. MM used the hand clutch lever of the hand clutch tractors to shift the shuttle transmission from forward to reverse. You should have two foot pedals on the left side of the tractor. The outer one is the clutch pedal and the inner one is for the brakes. These tractors did not have individual turning brakes. Down near where the brake pedal pivots, assuming you still have it, is there a fulcrum bolt still screwed in to the side of the transmission case? That would be the pivot point for the clutch pedal. Be aware that there is a serial number break for two different clutch pedals and rods when you go looking for one. I can send you this info or e-mail a scan of parts book.

Firing order for your tractor is 1-3-4-2, I can't remember rotation of distributor shaft, but you can check that easily. Sometimes a too lean setting of carb will cause back firing too, as well as a sticking valve.

Do you still have the hood side shields on your tractor? Most of the UTIL's around are missing theirs, and they are unique to this tractor as the hood is longer because of the extra 8" of the shuttle transmission. Hope this helps.

Jim

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Thomas Geiger

05-28-2002 11:06:58




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 Re: Re: Re: MM UTI Tractor in reply to Jim Parisot, 05-19-2002 07:44:08  
Hello Jim,

Thank you for the information. Yes, I mistook the left foot pedal for a wheel brake (it was frozen up at the time). A little penetratin oil and a rap or two of convincing and the clutch was working. We did have the right firing order, but had a stuck intake valve on #3 which then bent the push rod. We found a local dealer which still stocks some parts and had some used push rods, as well as gaskets for the valve covers and the carb, plus belts for the fan and generator. We are dealing with a worn throttle rod and bushing, but have improvised. After readjusting the valves, along with the new push rod, the old girl sounds much better.

One quick question: Do we dare run regular, unleaded pump fuel through this unit or do we need additive to protect the valves?

Thanks again for your help

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THE WINO

07-16-2002 10:32:25




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 Re: Re: Re: Re: MM UTI Tractor in reply to Thomas Geiger, 05-28-2002 11:06:58  
HELLO THOMAS, I WOULD RUN 90 OCTANE WITH 4oz. OF MARVEL MYSTERY OIL.GREAT LUBRICATION ON THE TOP END.KEEPS THE CARBON CLEANED OUT.I HAVE BEEN USING MARVEL SINCE 1958. A PROVEN ASSET TO THE HOME MECHANIC.IF YOU COULD LOCATE A MARVEL OILER, THEN YOU JUST ADD A QT. ONCE IN AWHILE THE VAC-UNIT DOES ALL THE WORK.(IT IS INJECTED INTO THE INTAKE MANIFOLD.(THIS IS ALSO A GREAT ADDITION FOR LP/GAS MINN-MOLINES)THE WINO.

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scott

05-18-2002 19:00:44




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 Re: MM UTI Tractor in reply to Thomas Geiger, 05-17-2002 23:03:10  
I'm not real familiar with that particular model but it sounds like the clutch is not releasing.



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