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Farmall & IHC Tractors Discussion Forum
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300 Utility transmission help needed ASAP

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DrJK

10-30-2006 12:45:25




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Hi all, Can anyone give me some help withthis problem? When I put it in gear and let out the clutch it is locked up and stalls the engine. When I let out the clutch while out of gear it goes as if it is in 3rd or 4th gear. Does anyone know what the problem os and if there is a simple solution? Much appreciated. I need this tractor for clearing the winter snows!




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504-1

10-30-2006 18:47:47




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 Re: 300 Utility transmission help needed ASAP in reply to DrJK, 10-30-2006 12:45:25  
Make sure to block the wheels or it might roll when you line up the forks!



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Janicholson

10-30-2006 17:26:34




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 Re: 300 Utility transmission help needed ASAP in reply to DrJK, 10-30-2006 12:45:25  
The transmission is in third or fourth. TO get it out take the lever off of the cast shift tower and align the shift rails with a large screw driver. Getting the lever out may require the removel of some small plugs that may be holding in a cross pin. The tip of the shifter lever will need to be built up with weld and ground down to just fit in the rail slots. There are nice photos in the archives as to what they should look like under shifter repair. This is not a big issue. JimN

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jk

10-30-2006 16:02:56




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 Re: 300 Utility transmission help needed ASAP in reply to DrJK, 10-30-2006 12:45:25  
my dads 350u does the same thing. the forks in that are worn bad from years of loader work. you have to be really careful to take it out of gear strait, of you "round" it at all it gets stuck. what we do is that off the trans top plate and rock the tractor back and forth ( with engine NOT running) and we can get it out of gear.



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mhmalcolm

10-30-2006 13:55:57




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 Re: 300 Utility transmission help needed ASAP in reply to DrJK, 10-30-2006 12:45:25  
If you can move the shift lever from side to side the normal amount when it is in the neutral position, you have a broken shift fork. My Dad's 350, which has the same transmission, broke two shift forks over a 30 year span. You have to remove the transmission top cover/hydraulic reservoir to replace it. You'll need to drain the hydraulic reservoir by disconnecting the steel line that goes to the power steering, remove the pressure/return line manifold that goes from the engine mounted pump to the reservoir, disconnect the hydraulic hoses from the fast hitch cylinder, and if you have remote valves, disconnect the couplers where they are mounted to the tractor. The hoses and the couplers can stay connected to the valves if I remember right. Then make sure the gear shift lever is in the neutral position, remove all the bolts from all the way around the cover, and lift off the cover with a hoist or another lifting apparatus. The shift rails and forks are mounted to the bottom of the cover. The broken fork will usually be sitting in the gear hub down in the transmission. I think I set the cover on its side to remove the shift rails. Be careful not to lose the detent balls or springs when you remove the rails. You can use heavy grease to hold them in place when reinstalling the forks. The cover and reservoir assembly is HEAVY, so be careful. Sometimes you can weld a broken shift fork, but it has to be absolutely perfect. I would recommend getting a new one or a good used one instead of welding it. The replacement shift fork, cover gasket, and probably some new o-rings for each end of the hydraulic manifold should be all the parts you need. When you reinstall the cover it can be a little tricky getting the shift forks into the slots in the gear collars as you lower the cover. Good luck!

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DrJK

10-30-2006 19:13:59




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 Re: 300 Utility transmission help needed ASAP in reply to mhmalcolm, 10-30-2006 13:55:57  
Thanks a million guys for the detailed replies. I"d like to get her through another winter at least. Dressed up with her chains she can go in the worst snow and ice that SD has to throw at us.



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old

10-30-2006 12:49:45




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 Re: 300 Utility transmission help needed ASAP in reply to DrJK, 10-30-2006 12:45:25  
Sounds like its stuck in either 3rd or 4th gear. About the only way to fix it is to pop the cover/shafter off of it and have a look see. Can't help more then that because I have never been into one of them before but from what you say its stuck in gear and the shafter has popped out of the shift rail or the shift rail has broke

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