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300U Wishbone Repair

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Bob Kirk

12-15-2001 16:38:41




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I just discovered that the front end "wishbone" of my recently acquired IH 300 utility (w/ PS & loader w/no down pressure) is completely loose at the rear end where the "ball clamp" is supposed to be bolted up under the tractor. The three 1/2" bolts are gone. The rearmost hole (directly under the ring gear it appears) looks like the threads may be bad. The front two holes I can't see since the clamp is displaced about 3/4" toward the front of the tractor, so the clamp is covering the holes.

What's the best & safest way to move the wishbone clamp 3/4" toward the rear of the tractor? In effect, I need to move the front spindles 3/4" closer to the line of the rear axle. Should I jack at the middle of the tractor behind the ball clamp or at the front of the tractor? Would a "come along" hooked to the rear hitch and the front wheels do the job?

I'd appreciate any thoughts you have -- especially from a safety point of view. Unfortunately, I have no shop. This will be a winter "shade tree without leaves" adventure.

Thanks.

Bob

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Bob Kirk

12-16-2001 14:40:27




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 Re: 300U Wishbone Repair in reply to Bob Kirk, 12-15-2001 16:38:41  
Many thanks for your very helpful comments. The wishbone is remounted, though with two bolts instead of three. The rearmost hole was drilled and tapped for a 9/16" bolt rather than the standard 1/2" -- but the bracket was never drilled to allow the larger bolt to be installed. Given what you said about the hardness of that bracket, maybe the easier way would be to use a helicoil to re-establish a 1/2" hole.

Hopefully this will hold as is for now.

Again, many thanks.

Bob

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Red Rider

12-15-2001 20:27:05




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 Re: 300U Wishbone Repair in reply to Bob Kirk, 12-15-2001 16:38:41  
Bob On my 300U the pivit pin does have play both in front of and behind the axle. If you jack your tractor up right under the front axle pivit point there is a plate there so you won't be jacking on the axle, you will take all the weight off the axle. It should slide back to align the holes for your ball socket bracket. If the threads are shot on any of the holes then using the correct size drill bit for the next size bolt, drill and tap it. It might be cold under a shade tree this time of year especially without leaves.

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Bob Kirk

12-16-2001 06:21:55




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 Re: Re: 300U Wishbone Repair in reply to Red Rider, 12-15-2001 20:27:05  
Red: Actually, this time of the year in West Virginia the lack of leaves is a very GOOD thing -- especially if I wear a black coverall.

Thanks very much for your help. I think I see how to go about this.

Bob



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Red Rider

12-15-2001 20:26:45




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 Re: 300U Wishbone Repair in reply to Bob Kirk, 12-15-2001 16:38:41  
Bob On my 300U the pivit pin does have play both in front of and behind the axle. If you jack your tractor up right under the front axle pivit point there is a plate there so you won't be jacking on the axle, you will take all the weight off the axle. It should slide back to align the holes for your ball socket bracket. If the threads are shot on any of the holes then using the correct size drill bit for the next size bolt, drill and tap it. It might be cold under a shade tree this time of year especially without leaves.

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IH-NEAL

12-15-2001 17:23:59




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 Re: 300U Wishbone Repair in reply to Bob Kirk, 12-15-2001 16:38:41  
Bob, you should jack the tractor some place behind that connector. In other words get all the weight off the front. Use jack stands so it is safe to work under and with a stiff pointed pry bar pull the front into line so you can get a bolt started in the upper half of the clamp to hold in position. That is put the bar through the clamp and angle to the hole in casting and reef it in place. No big deal done it many times. What you may have to do if threads are gone in casting is put a bolt in there and use a thin lock nut to hold it as you will have trouble drilling that upper clamp as it is hardened and I mean hard. Then get a new cap and your home. Good luck. Let me know how it works. Happy Holidays.

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Bob Kirk

12-15-2001 17:43:41




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 Re: Re: 300U Wishbone Repair in reply to IH-NEAL, 12-15-2001 17:23:59  
Neal: Thanks very much for your thoughts.

I didn't follow the part about the lock nut -- maybe we are talking about different parts. On mine, the two halves of the "ball clamp" are still bolted together with two big bolts -- but the top half of the clamp is supposed to have three 1/2" bolts holding it to the belly of the tractor. Those are the three missing bolts. Its the hole in that main casting of the tractor that I think may be stripped.

Thanks again.

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LanceM

12-16-2001 04:06:19




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 Re: Re: Re: 300U Wishbone Repair in reply to Bob Kirk, 12-15-2001 17:43:41  
Bob,

As was mentioned above if you take the weight off the front wheels it should move back. It's been a while since I messed with mine but I believe that there is enough room that you could get a nut on that bolt going through the stripped hole by going through the clutch inspection cover hole as I believe those are through holes into the clutch housing.



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IH-NEAL

12-16-2001 00:16:46




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 Re: Re: Re: 300U Wishbone Repair in reply to Bob Kirk, 12-15-2001 17:43:41  
Bob, in that case you may have to go with some heli-coil to replace the correct bolts in there. I guess I thought you were referring to the one right in line with the flywheel, being stripped as there you have to use the thin nut inside to hold the bolt, and clear flywheel. Sorry.



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