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Tractor Pulling Discussion Forum

excessive rpm's

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D boll

04-11-2006 07:56:49




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I see alot of stuff here on turning old tractors 3 to 5 thousand rpms, I saw living proof last summer what happens when clutch/flywheel assemblies explode, it cut the tractor in half and sent pieces 300 feet or more! Any club/show is really risking a lawsuit. Steel flywheels and blankets are a must. If you still have doubts ask any legless drag racer from the 60's who learned the hard way!




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Drew

04-12-2006 15:35:10




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 Re: excessive rpm's in reply to D boll, 04-11-2006 07:56:49  
Unfortunately we live in a world that is becoming more and more overrun by stupid people. No matter how hard you try, you cant break the laws of physics, and sooner or later, it will come up and bite these people running excessive rpm w/o the proper components in the a$$. All I can say is that I hope the stupid people doing this are the only ones that get hurt.....that would be natural selection at work.

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DSK

04-12-2006 06:43:46




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 Re: excessive rpm's in reply to D boll, 04-11-2006 07:56:49  
I recall a incident about 15 yrs. ago where a 4250 pulling super-farm without a blanket decided say goodbye to its' CAST flywheel. Fortunately, the grandstand was not on the left side of the tractor, as the starter and assorted clutch housing shrapnel was found up to 300 ft. out in an open field. The force of the explosion broke an IH suitcase weight in half,(try that with a sledge hammer). I cringe every time I hear a 40+ year old machine coming down the track at 40-100% or more over factory RPM. I don't care what brand of cast-iron they're running, someday it's gonna pop and someones gonna get severely hurt or killed. RPM rules are good & need to be enforced.

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Pulltoy

04-11-2006 13:39:32




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 Re: excessive rpm's in reply to D boll, 04-11-2006 07:56:49  
D boll, where did you see the clutch explode at ? What kind of tractor was it ? I agree that many pulling too relaxed on safty and or just don't know what can happen. I also see tech people that don't have a clue about what's safe or unsafe.



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DBoll

04-11-2006 19:19:41




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 Re: excessive rpm's in reply to Pulltoy, 04-11-2006 13:39:32  
It was in MN, 900 Case, around 4000rpm, I have seen more than 1 G JD flywheel start cracking from the center outwards.



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the preacher

04-11-2006 19:55:17




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 Re: excessive rpm's in reply to DBoll, 04-11-2006 19:19:41  
I agree. The clubs I pull with have rpm rules, but no one seems to ever check them. I had mine checked voluntarily just to be sure that I was within my legal limits. Another factor can be some of these so-called "stock" 40-50 hp tractors making in excess of 100 hp. Rear ends and transmissions are only made to take so much. It would be hard to enforce, but I would like to see the clubs I pull with put these stock-appearing tractors in a different class.

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the Choir

04-13-2006 20:26:53




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 Re: excessive rpm's in reply to the preacher, 04-11-2006 19:55:17  
Most of you guys complaining run natpa or usap dont ya?? We have open rpm hobby stock classes in our area, must run scatter blanket, steel flywheel, never had a problem, but, go to one of these natpa pulls etc, and they have rpm limits, but nothing else, so thus you have the 1200 plus cube molines etc, they fly apart too folks!! Why dont these so called "national clubs" pull there heads out of there a$$es and make some realistic rules? All these guys spending all this money, and all this biching, and then you guys are worried about rpms, my god!!!! Get with it folks!

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DBoll

04-14-2006 05:16:16




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 Re: excessive rpm's in reply to the Choir, 04-13-2006 20:26:53  
To Choir, I don't and would not belong to NATPA unless I were running points however I do pull in a few of their pulls and agree with most of their rules except the favorism to AC, I made my posting as a result of something I saw, this was at a non sanctioned pull and was intended as a friendly warning, some people can make power at rated speed! You'll feel kind of silly when the doc is picking schrapnel out of your a$$!

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Deutzilla

04-14-2006 06:11:56




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 Re: excessive rpm's in reply to DBoll, 04-14-2006 05:16:16  
Oh you forgot about the unwritten rule that NATPA has of USA made tractors only..... Wait until a Cockshutt gets asked not to pull....go Deutz



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D boll

04-14-2006 10:26:15




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 Re: excessive rpm's in reply to Deutzilla, 04-14-2006 06:11:56  
I have no problems with Deutz pulling, I know they can be made to run hard. If it's not in black and white and voted on it's bull $hit



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