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Tractor Pulling Discussion Forum

Building a Minneapolis Moline RTU...need tips.....

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Kyle

08-29-2004 19:10:36




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Anyone know anything about building a RTU puller?? where can i find parts??? what do you do??? any tips would be great!!

thanks




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mo4xdadad

08-31-2004 16:59:39




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 Re: Building a Minneapolis Moline RTU...need tips. in reply to Kyle , 08-29-2004 19:10:36  
These little engines have potential. I have a kit to install an M5 style govenor in a R or Z engine. We also build custom pulling motors for R,Z,U,UB, etc. We have had good luck with ours.



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Mopower

08-30-2004 05:27:47




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 Re: Building a Minneapolis Moline RTU...need tips. in reply to Kyle , 08-29-2004 19:10:36  
Kyle, I am building one as well. I"d be glad to help you out. E-mail me or give me a cal at 517-726-0484. I can tell you about parts and get you in touch with some very good people too.



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Tyler Staley

06-03-2005 18:09:42




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 Minneapolis Moline RTU what years were they made in reply to Mopower, 08-30-2004 05:27:47  

what years were the made



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Augie

08-30-2004 11:58:12




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 Pulled mine Saturday night in reply to Mopower, 08-30-2004 05:27:47  
For the first time - in the MUD, so I wasn"t able to learn much. It didn"t break or snuff so I can"t be too far off.

Scales were broke so it turned into a no-points fun pull. We bumped the DivII speed limit to 5mph and went on the honor system (HA HA) for weight.

I haven"t had mine across a scale yet so I just took a WAG and tossed 100lb on the back and 50lb up front. Ran 2nd gear in the 3250 and missed 1st by less than 2 inches. I hung 4 70 pounders on the back for the 3500. The governor seemed a little sluggish in the 3250 so I dropped to 1st gear for the 3500. Probably should have stayed with 2nd gear - couldn"t get enough bite for it to even hit the governor running in 1st.

We"ve got two weeks til the next time we"re going to pull so I"ve got plenty of time to get the chicken bars built and do some tuning. Hopefully we"ll have a dry track to pull on...

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Mopower

08-30-2004 12:07:29




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 Re: Pulled mine Saturday night in reply to Augie, 08-30-2004 11:58:12  
My Deere H didn"t fair to well in the mud either. The R governors are a weak point. Still toying with ideas there. I heard that a pierce govenor has been retrofitted on an R before. Hmmmmm m.



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Augie

08-30-2004 13:26:46




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 Not a R governor in reply to Mopower, 08-30-2004 12:07:29  
This one is packin a 206 from a ZA. Acts like somebody had it apart and put the weights back in upside down. It"s slow goin up and it don"t want to idle down either.

I"ll pull it apart this weekend and take a look.



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Mopower

08-30-2004 13:34:16




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 Re: Not a R governor in reply to Augie, 08-30-2004 13:26:46  
seems to be the weak point on these machines. Have you talked to Matt Gall (Motec)? If I get any solutions, I will post something. My buddies ZAU is wierd like that. Dad got his UB working great. Something in the assembly process he kept making it bind when he drove in something. He fixed it, but the ZA might be different. My R packs a 206 as well. I"d like to play with weights and springs some.

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ChadS

08-31-2004 08:29:40




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 Re: Not a R governor in reply to Mopower, 08-30-2004 13:34:16  
On my ZAU, most problem I have is in the throttle linkage, not enough travel in the assembly to open the governor more. I think it is right on the money for what it is,,, snappy little moline,, Has the big overhead manifold 206. dont know what HP they make,, mine is 43 hp, I think there is more there as well, Why is it that there is not more of the little MM in competition pulling today??? I know,,, thee is someone out there that has em,, Come on fellas!! Who has a big HP MM R-Z that they would tell us a bit of the potential these Minature MM have? ChadS

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Mopower

08-31-2004 08:36:04




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 Re: Not a R governor in reply to ChadS, 08-31-2004 08:29:40  
Limited bore size and small ports/manifolds. Good speed limit machines. Go 206 OHV! My R should be 60 horses when it gets running. It scares me. My first pulling motor I built from the ground up! The rest were just bolting M-M parts together, but this was a lot of extra port, manifold, valve, carb, compression, and cam work.



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ChadS

08-31-2004 08:54:39




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 Re: Not a R governor in reply to Mopower, 08-31-2004 08:36:04  
Where in Michigan are you Ethan? you get that one running,, bring it down to the shop will dyno tune it for ya!! Maybe more there than you think,,, is the engine together?? ChadS



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Mopower

08-31-2004 09:09:20




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 Re: Not a R governor in reply to ChadS, 08-31-2004 08:54:39  
I"m up between Lansing and Battle Creek. The motor is together. Needs wiring, points etc. It is propane heads and 227 cubes. Ought to be good.



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ChadS

08-31-2004 16:02:07




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 Re: Not a R governor in reply to Mopower, 08-31-2004 09:09:20  
You aint too far away from me, almost straight south of you in northern indiana. 125 miles about one way. Get that one running, get it broke in, and run a compression test, that will give ya a good idea on what it is capable of hp wise. Mine being a stock 206, at 155 psi, (after tuning) your should be close or just over 200 psi, if the results from the LP parts, do the same as what they do for the U-6cyl. if that is the case,, yes, I would say you hp goal is very capable, maybe even a bit more. ChadS

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MMark

08-31-2004 17:19:55




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 Re: Not a R governor in reply to ChadS, 08-31-2004 16:02:07  
The problem with the governor is wear in a couple of places. Your governor is working, it is just lost in all the slop from years of wear. Mine was doing the same thing. After a little work I can adjust up to about 2100 rpm without any problem. It is very responsive also. Its a little hard/long to describe on here. E-mail me and we'll talk.

Mark Damewood



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ChadS

09-01-2004 09:22:14




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 Re: Not a R governor in reply to MMark, 08-31-2004 17:19:55  
On my ZAU, there is a pivot point down by the bellhousing,, that hooks up to the governor linkage,, this part that comes off the throttle linkage then down to the pivot linkage to the governor,,,, anyways,,, the linkage is hitting the bellhousing!! at full throttle, and stops the linkage from anymore travel. If i was to move the pivot linkage to allow a bit more travel,, it would rev up higher. The adjustment bolt in the governor dont do anything that I have seen when I turn it out to get more rpm,, the governor linkage is too long to pull on the governor linkage to increase rpms. Is your MM a red nosed MM?? I think mine is a later model,,, it has the flat front grille like the G has,,, according to the books,, they made the ZAU for 2 years,,, I know the ZA was built longer than that,,, Only thing I can say is that if it is new enough,, MM made changes to the cams, heads, jugs, etc etc, to make more power as the series progressed. that is the only reason why I belive it is a bit stronger than the average Z 206. Yeah, I have reworked over the carb, and the valve lash,,, and that helped a bunch,,, I think it could be stronger yet, still have yet to touch the distributor on this one,,, (Just have to watch my fingers to set the timing on it!!!!) Close to the fan!! LOL. ChadS

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MMark

09-01-2004 13:49:34




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 Re: Not a R governor in reply to ChadS, 09-01-2004 09:22:14  
I have one of each a red nose ZT and a ZA. I think one end of that cross shaft is set screwed to the shaft and can be adjusted, if not just heat the cross shaft and twist it. The tractor cam grinds are all the same, there are different numbers but they are changes to hydraulic lobes or gears. There may have been a different cam for the skid/pump engines but all the ones I have seen had a tractor cam number.(suffix A,B,C,D.)(E?)There are many head numbers, the most common are 226C and 226D. The ZA was tested in '50 at a max of 36 hp on 70 octane and a 226D head (5.6 to 1). With good gas and a 226C head (6.2 to 1) a ZA/ZB should make 40 easy maybe a little more with out tweeking.

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ChadS

09-02-2004 07:52:51




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 Re: Not a R governor in reply to MMark, 09-01-2004 13:49:34  
Last time I had seen a small MM pull around here was a very long time ago,, They are from up around Churubusco (Spelling) Indiana, they had a few of them,, One was a Twin City,, and the other was a R, Got beat on sevral occasions by those tractors!! I seen him at a pull earlier this year, did not get a chance to sit down and talk with him, just wonder if he still had them!! The family was very competitive with the tractors they pulled, and he seen my ZAU, grabbed his eye I think. Todays fuel,,, we all miss leaded fuels,, but we have to do with what is offered these days, some of the pump gas aint too bad!! Just have to tune in the proper octane, and if possible, a slower burning fuel,, makes torque,,, Ya know,, we all get caught up in how big to make an engine,, gotta go for the big power,,,, strokers,,, big bores,, cams,, etc,, I like these more and more I look. Cause to me,, it is more fun to do it myself,, bolt it together, and make a good strong puller. You know as well as I do,,, inthose light classes,,, that big hp can kick you in the butt, and the ones who get the bragging rights, are the lower hp tractors that you get on them, and drive, the engine does the job a person designed it for, I have one of those big HP modified antiques,, I regret it sometimes,, but would never go back as long as that color is concerned. Tractors like the MM, are famous for making the big power, with doing little to them but bolt of better parts and upgrades. More for less??? maybe,,, But I think,, a spicy ,slightly larger cubic inch engine, would be great,, for div 3,, 3500-4000 lbs,, a good 70-80 hp is all you need, you can tune the HP with tire size, sure all the others say go BIG,,, well I could,, but is that the way I would really want to go??? ChadS

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Augie

08-30-2004 21:14:04




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 Less weight, more spring in reply to Mopower, 08-30-2004 13:34:16  
has worked for me on our other tractors. I bet it'll work on this one too.



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