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Tractor Pulling Discussion Forum

Geared for destruction!

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ChadS

04-21-2004 14:30:49




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For those of you who have Farmall H tractors with big power you may want to read this, When I pulled, I was in 3500 div 4, running 4th gear, was starting to get a load on the engine, when she shuttered, went about 3 more feet, and shuttered, and made some gruesome noises coming from the tranny. Stopped the tractor, and wondered, will it move? it did, after unhooking from the sled, and driving out to the truck, I tested all the gears, rode the brakes a bit, trying to make it slip, or strip the gear. Nothing happened, was not whinning, or making a clunking sound at all, HMMMMM!!!!!????$#^%Q#^#!! So I got it home, took off the belt pulley cover, looked in there with a light, couldn't see any teeth missin. Finally, removed the whole top plate, I found something interesting. Now that I could see down in the tranny, and inspect the shifter linkage, Found out what happened. 4th gear had a bad wear on the enguaging side of the gear, (typical gear grinding over the years) But had alot of fresh small breaks on half the gear. top and bottom gears. No teeth was missing, All I cna think of, is it was not fully shifted into 4th and when I put a hard load on it, it popped out, but never got into nuetral. I had a strap on the gear shift as well, I always have ran one on it, to help hold it in, but since the shifter was locked down, it kicked out of gear, but did not hit neutral. Sat there and stripped like you was shifting gears, LOL. The front shifter linkage was bent, and had a fresh gash in it on both sides of the fork. It is bent as well. Looks like I get to put in those new gears i made! LOL So, if you do get into the tranny of these tractors, have a look at it closely, don't let this happen to you! It happens to the best of em! LOL ChadS

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RED WHEELS

04-22-2004 19:46:13




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 Re: Geared for destruction! in reply to ChadS, 04-21-2004 14:30:49  
Just go to work and make a 4th gear lock like I described and your trouble with 4th gear jump outs will be over. I learned of this device some time ago after seeing it on div 5 tractors and turbo class tractors. These guys have had that trouble also and it's the best way to insure it from happening. With a solid pin dropping down next to the fork after it is shifted into 4th it can't move. I know of one worn out 560 that got a new turbo charged engine that works great and the transmission was not rebuilt otherwise and it produces 150 hp.

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ChadS

04-23-2004 06:29:39




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 Re: Re: Geared for destruction! in reply to RED WHEELS, 04-22-2004 19:46:13  
Thanks to all! I am going to replace all of the gears again, Not going to take the chance again. The gears are not 6 seasons old! But still lots of stress on a small system. Just ordered all new bearings again, and I am looking into a different lock that goes on the fork itself like you guys mentioned before, just locking the shifter in place is not going to hold it any longer! LOL!! Never had that problem with the old motor, this new one is coming to life! Breaking everything in its path! Somehow, I will get her to hold together! Thanks again to ya all! Chad

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Farm w/Junk

04-22-2004 15:03:59




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 Re: Geared for destruction! in reply to ChadS, 04-21-2004 14:30:49  
Chad dont have any comments about your problem, but was wondering if you got my email? About a farmall H puller. Thanks
Matt



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ChadS

04-23-2004 06:23:13




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 Re: Re: Geared for destruction! in reply to Farm w/Junk, 04-22-2004 15:03:59  
Matt, sent u an email! ChadS



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farmall

04-22-2004 06:25:09




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 Re: Geared for destruction! in reply to ChadS, 04-21-2004 14:30:49  
ChadS, Sounds to me like you have bearing problems. To much play causes to much gear misalignment, bending shift fork. Once this happens the gear teeth get worn to this misalignment and that is why you had to tie shifter in gear. The other thing is 4th gear is a weak gear anyway and should not be used under high stress situations. Speed up you constent mesh gears so you can run a lower gear. This is what I did on my 'M' and works fine for me. Speeding up the trans puts lower torque through the gears. Just my 2 cents worth Farmall

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ChadS

04-22-2004 06:36:45




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 Re: Re: Geared for destruction! in reply to farmall, 04-22-2004 06:25:09  
I agree, the small pilot bearing in the top shaft has a bit of play in it too, needs to be replaced as well. it gives about .120 play in the shaft. it took a beating. I had rebuilt the tranny and final drive about 6 seasons ago, new bearings and such, but they lose tolerances too under the stress the engine put on it. Is there heavier parts to install in the shifter forks or linkage? I got a perfect set of shifter forks, and linkage, Is there anyway to adjust the fork, or the whole assembly? Thanks Chad

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RED WHEELS

04-21-2004 18:46:48




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 Re: Geared for destruction! in reply to ChadS, 04-21-2004 14:30:49  
I made a fork lock on my 460 that has a 3/4 inch shaft that drops down behind the fork thru the belt pulley plate that will not let the fork move in 4th gear and prevents that from happening. I have seen torn up gears before too.



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shultz

04-22-2004 06:23:33




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 Re: Re: Geared for destruction! in reply to RED WHEELS, 04-21-2004 18:46:48  
I have welded up the fork slider where the ball is to hold it into gear, and reground the groove a little further into gear so that the gear actually goes over center and has both good surfaces(about 2/3 of the gear that isn't rounded over) driving together, and it has worked very well. With the rounded surfaces matching up, they tend to want to push against each other and naturally push the gears apart. Once you get that fixed, your next challenge will be to keep those gears from snapping off if you get a good hook and really have the putty pouring on to her in an oversized engine application such as yours. When I put the forks back together, I usually stick a nut or a few washers back under the spring to increase the tension and help it snap into gear harder. It takes 2 hands on our M to get it out of gear, but it stays there now.

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ChadS

04-22-2004 06:39:44




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 Re: Re: Re: Geared for destruction! in reply to shultz, 04-22-2004 06:23:33  
I will be honest, I have not broken a tranny gear tooth yet, I have broke the main input shaft gear at the front before, had to replace everything in it, even the rear end housing. Did you use a larger ball for the spring and ball assembly in the shifter? Thanks! Chad



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shultz

04-22-2004 10:29:48




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 Re: Re: Re: Re: Geared for destruction! in reply to ChadS, 04-22-2004 06:39:44  
Same ball - just more tension. You may end up taking it apart and regrinding a time or two to get it to actually shift out of gear. If you had a milling machine and the propper sized mill that matched up with the ball diameter I imagine you could get the contour a lot better than I can with the hand held grinder :)



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