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MM letter designations for model U's ??

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Alberta Mike

12-29-2004 21:09:23

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A couple of questions about MM tractors.

1. What was the difference between model U's and model UB's?
2. When did the diesel engines show up in model U's?
3. What do the letters stand for in a model U that is model UTSD-M?

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Alan Dewsnup

12-30-2004 12:50:40

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Re: MM letter designations for model U's ?? in reply to Alberta Mike, 12-29-2004 21:09:23

I own a UTSD-M and I live in the western US. I understand that the UTSD-M was built as an export model to go to Turkey. For some reason, most, if not all of them didn't make the ocean trip but were sold into Canada and the US. Do you know of any or many in Canda? I am in need of a sound injector pump for my tractor should anyone know of a parts unit. My tractor is a very late production, I think 1958.
Alan

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Bob M

12-30-2004 05:52:52

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Re: MM letter designations for model U's ?? in reply to Alberta Mike, 12-29-2004 21:09:23

Mike -

1 - Major differences between the U and the UB: The UB has a higher operator platform and seat, the steering wheel mounted on the tractor centerline, a foot-operated clutch, and disc brakes. I believe also the UB had 12 volt electrics, though of that I am not certain. (A friend of mine has a '55 UB that is factory 12 volt...)

2 - The U diesel was first offered in 1954.

3 - Not sure what the "M" is for - perhaps built to military specs? (Ordinarily a military tractor was denoted by an "X" suffix...) Anyway the other letters in a UTSD-M: U = model series T = tractor S = standard tread D = diesel

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Kevin Moschenrose

12-30-2004 07:37:52

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Re: MM letter designations for model U's ?? in reply to Bob M, 12-30-2004 05:52:52

Bob, You where right the first time "M" means military, and "X" is experimental and is general denoting letter in all the tractor manufacturing.

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Kelvin

12-30-2004 17:55:53

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Re: MM letter designations for model U's ?? in reply to Kevin Moschenrose, 12-30-2004 07:37:52

Strangely enough, I have a '54 'utsd' that only says 'U' on the serial number tag.

As far as I know all UBs were 12 volt.

Also, I've seen pictures of UTUs (U=2 wheel narrow front) with diesel engines. Were these produced in '54 or earlier?

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BMG

01-01-2005 10:21:03

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Re: MM letter designations for model U's ?? in reply to Kelvin, 12-30-2004 17:55:53

Kelvin,
The UDU and UTS Diesel both came out in 1952. There were very few (30) UDU made before being replaced by the UBD in 1954 but the UTS Diesel was quite popular. All UDU and 1952 UTS Diesel production were considered experimental or prototype tractors.

Brian

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Kevin Moschenrose

12-30-2004 23:19:30

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Re: MM letter designations for model U's ?? in reply to Kelvin, 12-30-2004 17:55:53

Kelvin, This is what I was told about just having the I.E. "U" stamped in the plate and it was a UTU or UTSD and so on from a MM plant worker. What MM did was to make up the rears a few in advance some times and went ahead and stamped the plate and attached it. So when you a customer would order like a UTS they some times would just grab one either off the line or an advance built rear and slap on what you wanted on and shipped it to the dealer. Also last minute production changes caused this too. I have a UTS stamped with just a U and it has the serial number listed as a UTS 1950 model. I have seen others in 1950 stamped UTS. No set in cement method to the madness.

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Big Al's Acres

12-30-2004 19:20:01

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Re: MM letter designations for model U's ?? in reply to Kelvin, 12-30-2004 17:55:53

My UTSD-M is very late in the production, I think 1958, would it be 12 volt?
Alan

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grandfield

12-31-2004 05:18:58

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Re: MM letter designations for model U's ?? in reply to Big Al's Acres, 12-30-2004 19:20:01

Ideally, the Delco starter and generator should have the part # tag on them and indicate 12 volts, if not marked 12 volts, on the origional tag, they would be 6 volt. If there is a 7 digit number stamped into the case, "rebuilt", or on the origional tag, a rebuilder can tell you 6 or 12 volt.

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Kevin Moschenrose

12-30-2004 23:21:14

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Re: MM letter designations for model U's ?? in reply to Big Al's Acres, 12-30-2004 19:20:01

If I am think correctly MM started to switch to 12 volt systems in about mid 1950 and wher positive ground.

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moline

01-01-2005 17:45:32

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Re: MM letter designations for model U's ?? in reply to Kevin Moschenrose, 12-30-2004 23:21:14

Hey guys,what about the G series tractors?My GTC says G on the plate.Did they ever put GTC or GTB or GBD on the plates?Sorry,not a question about a U but I was just wondering.Have a happy new year filled with lots of "new"MM's!Moline

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Kevin Moschenrose

01-02-2005 19:57:47

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Re: MM letter designations for model U's ?? in reply to moline, 01-01-2005 17:45:32

My GTA is stamped as such on the tag but my GTB is not. I can only base what I am to say by my own two cents and not fact. I think the reason for this GTA replaced the FTA and 21-32. But they used a lot of the same parts including the rear cast housing. So having said that this is what I think. They done this so that the tractors could be proved by owners and such would not confuse the two tractors. Then when they had a complete revamp of the model GT's to come up with the GTB and later the GTC they dropped the other letters because it was pretty pointless to stamp them. We all know that GTB and GTC's where offered with only one type of front axle. When they changed to the newer replacement of the GTC and went to a GB they started to stamp those plates as GB. Here again that is all because they only offered the one type of front axle too. U's letters designation vs G's is different as far as that goes. MM did do a few strange things as far as not keeping a standard and this is one.

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Woodrow Caul

01-02-2005 15:32:57

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Re: MM letter designations for model U's ?? in reply to moline, 01-01-2005 17:45:32

My 1953 GTC is stamped with a G on the tag but serial # gives it a GTC designation.

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