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Farmall & IHC Tractors Discussion Forum
:

706 shifting, or the lack there of.

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matt

03-29-2004 05:44:49




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Well, brother and I worked on the new 706 for hours on Saturday, trying to get it into hi range. It will shift into hi, but as you leave the clutch out, it makes a terrible grinding and pops back out. We pulled the top cover off the tranny, and the only thing we can figure out is that when the shift lever is in Hi range, it is not pushing the coupler far enough to completely mesh the gears. Does this sound plausible? Any ideas how to fix it? Anything else we should check for? Also, putting that cover back down was a real treat. Is it better to open the left side panel on the trans to help align everything? You guys have come up with the answers before, so I am hoping you can help us out again.
Thanks.

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Jim

03-29-2004 16:21:49




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 Re: 706 shifting, or the lack there of. in reply to matt, 03-29-2004 05:44:49  
Call Wenz service at 1-800-808-7885. I had the same problem with 1566 in second gear the sliding gear does not go onto the trans gear very far and wears a rounded edge on gear and jumps out. Wenz has a different shifter cam that allows the sliding gear to move futher and keeps it in gear. They also have different couplings for the roll pins in the linkage that takes the slop out of it. It works great ad solved the problem for me.

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matt

03-30-2004 05:14:53




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 Re: Re: 706 shifting, or the lack there of. in reply to Jim, 03-29-2004 16:21:49  
Jim, Thanks! That sounds like the solution I was looking for! Do you have an idea what those parts cost?



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Jim

03-30-2004 16:59:52




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 Re: Re: Re: 706 shifting, or the lack there of. in reply to matt, 03-30-2004 05:14:53  
Matt, I don't rember for sure and the recipt is in the shop but it was alot chaper than splitting tractor and installing new gears. All I did was turn gears and take rough edge off with file and installed new cam. I just did the range cam and the collars on the shift linkage made all the slop go away and now stays in gear. If I ever have any trouble will do the hi lo cam. He welds up the cam and regrinds so will move the sliding gear futher on gears. He has exchange so will send you updated and you just send old one back - great guy to talk to and work with.

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matt

03-31-2004 04:46:03




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 Re: Re: Re: Re: 706 shifting, or the lack there of in reply to Jim, 03-30-2004 16:59:52  
Thanks again, Jim.
I called yesterday, but couldn't get an answer. I will keep trying until I get in touch with him.
Matt.



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Jimmy King

03-29-2004 12:20:56




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 Re: 706 shifting, or the lack there of. in reply to matt, 03-29-2004 05:44:49  
Matt I have the same problem on my 706 except it is reverse that mine won't go into. Haven't gone back into it replaced the shifting fork as it was broken work good a few days, wouldn't go into reverse at all before.



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Knut

03-29-2004 11:50:45




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 Re: 706 shifting, or the lack there of. in reply to matt, 03-29-2004 05:44:49  
Worked in the parts department when those tractors were new. I remember the Mechanic would check out all the external linkages first and then where the shaft went through the casting into the transmission a cam plate with a track in it had to be replaced along with a roller than slipped on the fork riding on the high gear. Think the roller was 380115R1, there were 3 different cams. That was 40 years ago but pretty sure that was the roller number????? good luck, I just got out the parts so can't help on the taking apart.

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Don

03-29-2004 18:45:42




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 Re: Re: 706 shifting, or the lack there of. in reply to Knut, 03-29-2004 11:50:45  
I had the same problem with my 706 a few years ago. I replaced the cam plate and roller as well as drilling and installing larger rollpins, also new bushings and the shaft that goes thru the cover. Parts cost nearly $400 but she shifts almost like new.



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Randy in NE

03-29-2004 07:44:03




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 Re: 706 shifting, or the lack there of. in reply to matt, 03-29-2004 05:44:49  
I have a buddy that has a 1206. He was having a similar problem where he couldn't get it into Hi range but Lo and Reverse worked ok. He took the tin off right in front of the steering wheel. Some of the linkages up in there were worn. He just built it back up with a bead of weld. Not sure exactly what part it was. I do remember that there was a small spring that went for a test flight when he was taking it apart. Luck was on his side because he was able to find the spring. Basically he just wiggled the shifter until he was able to spot the culprit. Good luck.

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matt

03-29-2004 08:20:26




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 Re: Re: 706 shifting, or the lack there of. in reply to Randy in NE, 03-29-2004 07:44:03  
Thanks Randy.
We went through all that linkage first, and straightened it out as best we could. We think the problem is in the transmission because the arm on top of the transmission plate is all the way back when the shifter is in High Range, but it still won't go all the way into gear. I will take another look at it tonight just to be sure though.



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Mitchissippi

03-29-2004 08:35:45




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 Re: Re: Re: 706 shifting, or the lack there of. in reply to matt, 03-29-2004 08:20:26  
Matt, if the 706 is setup similar to the 1066, there is a half moon key in the fork doing the actual shifting inside the tranny. This could be a sorce of slack if everything on the outside ckecks out.

There is an inspection plate on the left side of the transmission that can be removed to see the fork.

706 may not be the same as the 1066, but I thought I'd mention it.

Mitch



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