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Minneapolis Moline Tractors Discussion Forum

ZAU questions

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ChadS

09-08-2003 20:15:41

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I bought a MM ZAU a few months ago, got it out this past week and took it to a tractor pull. I am shocked of the power this little moline has. what was the production years for the ZAU? What does the "AU" stand for?? any comments would be great. Thanks, Chad

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jocco

09-09-2003 13:17:45

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Re: ZAU questions in reply to ChadS, 09-08-2003 20:15:41

the z was strong and andy is correct they did well at the pull in maine this year as for the h its no comparison to mm

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ChadS

09-09-2003 15:35:56

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Re: Re: ZAU questions in reply to jocco, 09-09-2003 13:17:45

I seen the power difference on the dyno, the ZAU had a longer power curve than the H, My Super H is 42 hp but does not have the lugging power the Moline has.

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jocco

09-09-2003 18:54:47

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Re: Re: Re: ZAU questions in reply to ChadS, 09-09-2003 15:35:56

never had it never will

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ChadS

09-10-2003 12:56:17

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Re: Re: Re: Re: ZAU questions in reply to jocco, 09-09-2003 18:54:47

True, there is no comparisson. Is there any parts available for the Z for mo power? Chads

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Trever Maas

09-10-2003 18:13:54

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Re: Re: Re: Re: Re: ZAU questions in reply to ChadS, 09-10-2003 12:56:17

Chad,

Are you looking for performance parts, bolt-on tune-up parts, or stock parts? For stock parts look up Welters in Verona, MO. Very good business to deal with. For some bolt on parts and other parts, Matt from Motec is pretty good and knowledgable. For big performance parts, maybe RiverDale FarMM Shop, etc. Some of that performance stuff you will have to make yourself, or hire someone to do it for you.

Hope this helps,
Trever

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ATHYRIO

09-09-2003 05:33:04

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Re: ZAU questions in reply to ChadS, 09-08-2003 20:15:41

So a stock Z is better than a POS IH H? Where is that POS H? Maybe you need to hire a mechanic to get that POS running.

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ChadS

09-09-2003 09:24:50

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Re: Re: ZAU questions in reply to ATHYRIO, 09-09-2003 05:33:04

You know, I never had a Moline untill recently, It sat in the shed until 2 weeks ago. Had good tires on it, it always started when I had to move it around, So, I took a break from the reds and went to prarie gold for a while. In my honest "Farmall" opinion, yes the Stock Z would rip up a stock H. Could be persuaded to be a moline man in the future???? H is at the shop, getting ready. ChadS

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Phil

09-11-2003 12:28:49

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Re: Re: Re: ZAU questions in reply to ChadS, 09-09-2003 09:24:50

My U has a set of M5 Blocks and M&W High Compression pistons. I bought the pistons and Blocks off of Lester Wenzel. They were the last "New NOS" pair that he knew of a few years back.

I am a pilot for a living and I am able to get some 100 octane Low Lead avgas once in awhile to feed this machine. I have had it on an M&W Dyno and it will pull almost 70hp - 75hp on the pto if we lug it real hard. Just barely pulling the governor it will come in at 65hp. I have never pulled it. It is "retired" from hard work.

There are guys in my tractor club that pull MM tractors. One has a LP U that does consistently well everytime in the 6000# class. MM tractors make great pullers in my opinion.

Phil

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Oklahomatractorrebuilder

09-09-2003 12:38:31

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Re: Re: Re: ZAU questions in reply to ChadS, 09-09-2003 09:24:50

Chads the 'Gold' is a nice change but once a 'Red Man' always a Red Man. Pulled a stock MM UTS against a stock Super M last weekend. M beat the MM by almost 50 ft. Know they are both stock because they are both mine. Tim

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ChadS

09-09-2003 15:33:02

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Re: Re: Re: Re: ZAU questions in reply to Oklahomatractorrebuilder, 09-09-2003 12:38:31

Yeah, you are probably right, But I aint prejudice, I like all colors. I took this ZAU to a pull earilier this year, It took a second place, All I did was put gas in it. Since then , ihave rebuilt the carb, and the distributor. It is 43hp at 540. It has fenders, I belive it has live hydralics, All the lights work, and real straight sheet metal. I like it, It is a good, strong running tractor. ChadS

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Tyler

09-09-2003 13:05:11

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Re: Re: Re: Re: ZAU questions in reply to Oklahomatractorrebuilder, 09-09-2003 12:38:31

I can imagine the Super M beat it, The UTS is a standard tractor. I've never understood why people choose to pull standard tractors. They weigh more with most of the weight obviously located at the front of the tractor, taking weight away from the rear tires. To keep it short, if you realy want to compare a super M to a U, try using a rowcrop U. Also, any experienced puller knows that there are many other factors that affect pulling (ie track conditions, tire pressure, temperature and humidity, operator skill, balance etc.) In my opinion, the best pulling tractor is which ever tractor is best set up for the conditions present.

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Oklahomatractorrebuilder

09-09-2003 18:19:49

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Re: Re: Re: Re: Re: ZAU questions in reply to Tyler, 09-09-2003 13:05:11

I may be wrong but I think the Super M is heavier on the front, at least mine is. It is a working tractor with a front end loader on it. We pull in a antique tractor club at slow speeds. I will say I thought the Super M would out pull the UTS because I have rebuilt the SM motor with high altitude pistons and used the 4 1/8 bore. The UTS was given to me to haul off and had only been running for 3 days when I pulled it, did nothing to it except weld the hole in the LPG tank up, change oil, rebuild starter, and put in points. I was very impressed with the UTS and am looking forward to getting it restored and ready for next year. The problem with both of the tractors was not a lack of power but lack of traction. I knew the UTS would lose because it was lighter than the Super M by almost 900 lbs due to liquid filled tires in it and dry tires in the UTS. By the way the Super M weighed in at 7490 and the UTS weighed in at 6620. Tim

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ChadS

09-09-2003 15:38:34

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Re: Re: Re: Re: Re: ZAU questions in reply to Tyler, 09-09-2003 13:05:11

My opinion on using a standard tractor for a puller, could be a large adavantage, Is the gearing different in the Standard tractors, than the row crops?? ChadS

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Andy

09-09-2003 16:43:57

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Re: Re: Re: Re: Re: Re: ZAU questions in reply to ChadS, 09-09-2003 15:38:34

UTS ,(standard) molines had smaller bull gears to speed them up as many had 30" wheels instead of 38" If you put 38" on a standard they are pretty fast. It's nice for 3-4 mph speed limet pulls because you can bump the horn in low gear rather than lugging in secound. There is a ton of horsepower potential with U molines.

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ChadS

09-10-2003 12:58:01

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Re: Re: Re: Re: Re: Re: Re: ZAU questions in reply to Andy, 09-09-2003 16:43:57

Is there parts out there for the Z like there is for the U-G. Blocks, heads, etc ChadS

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Andy

09-10-2003 20:46:02

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Re: Re: Re: Re: Re: Re: Re: Re: ZAU questions in reply to ChadS, 09-10-2003 12:58:01

There are a lot of Z parts out there but as far as building a hot puller you are somewhat limeted. there are some LP heads but not nearly as common as LP heads for U's/G's. A hot U puller is a lot more bang for your buck. If your local pulls require stock manifolds that's another problem. It would be tough (but not impossable) to give it enough air to make power at high rpms. we pull our Z's in stock classes and they place often and are close when they don't. A good cam grind will make a noticeable difference.

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John G

09-11-2003 06:27:50

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Re: Re: Re: Re: Re: Re: Re: Re: Re: ZAU questions in reply to Andy, 09-10-2003 20:46:02

Andy, Where would I start to look for a cam or a grinder for one I have? Guess I'd need to know what to grind it to also. Thanks, John

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Andy

09-11-2003 15:20:38

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Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: ZAU questi in reply to John G, 09-11-2003 06:27:50

Berry cam, Lester Prairie, MN, If information doesn't have a ph#, let me know and I'll find it for you.

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Andy

09-08-2003 21:30:17

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Re: ZAU questions in reply to ChadS, 09-08-2003 20:15:41

The ZAU was made from the late 40's until 1952 It replaced the ZT the Z is the model, the A is the series the U is for the front end,(a ZAN is a single front wheel, a ZAS is the standard tread, ZAE is the widefront). They are good stock pullers, my dad pulls one that's totally stock other than wieght brackets. It holds it's own and often beats some very strong JD A's and 77's. The 5" stroke and turbulant intake path make a lot of torque for it's size.

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