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Old 11-25-2011, 10:03 PM   post #1 of 15
Poppa Dave
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Default 5th gear lock out?

Howdy All;
My 1940 H works great in 1st thru 4th gears and won't go into 5th and stay there.
When you try to shift it into 5th from 4th, all I get is a grinding gear noise.
However, when you put it into 5th and pull back hard on the gear shift lever and firmly hold it there, it will run down the road just fine in high gear despite not fully shifting into 5th.
Thus my assumption that it must be a "lock out" for a steel rear wheel set up.
So my questions are;

1. What exactly am I looking for in the way of a 5th gear lock out device?
2. How do you remove it?
3. Is it some other "odd" trait of early Farmall's that I haven't heard of?
4. Is it I.H.C.'s way of giving those ugly green tractors a fighting chance?

Just wondering?
Thanks in advance.
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Old 11-26-2011, 05:08 AM   post #2 of 15
Vonrow
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Default Re: 5th gear lock out?

not 100% sure about the H models, but I know my 400 doesn't have "synchros" bewtween gears. Have you tried double-clutching bewtween 4th & 5th to see if it makes shifting easier? Other possibility could be a worn shift fork or lever, or even a worn 4th or 5th gear. But I'd be more likely suspect of a worn fork if you are having to hold the stick to keep it in 5th once you have it there.
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Old 11-26-2011, 12:39 PM   post #3 of 15
Poppa Dave
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Default Re: 5th gear lock out?

That's sort of what I thought too. But where it (the shift lever) binds up before hardly moving into 5th, I'm thinking something else. It shifts really well, smooth and easy into R, 1st thru 4th.
When I first noticed the problem, I put it into 5th and let out the clutch and got that gear teeth buzzing noise until it kicked itself out of gear. Tried it again thinking I might have tranny troubles and noticed that it will not go into 5th all the way. I'm talking maybe a 1/4 inch of throw at the handle end of the gear shift when coming out of neutral into 5th, then it stops.
Now my "M" has a lot more throw to the shift lever going into 5th and so does my Super C. Plus you can feel the detents popping into the fork rail slots to hold the thing gear. Same with that H, just not on 5th gear as the shift lever just doesn't move into 5th far enough to lock in.
I've had another International that had the tranny trouble that your speaking of and this is indeed different in the way it acts. On that one, you could put it into gear and then it would pop out. This H isn't even really getting into gear.
So I'm still stumped.
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Old 11-26-2011, 01:38 PM   post #4 of 15
Vonrow
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Default Re: 5th gear lock out?

hmmm. maybe a bent shift fork then??? I googled around a bit last night and couldn't find anything about a lockout for the H
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Old 11-26-2011, 01:44 PM   post #5 of 15
Poppa Dave
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Default Re: 5th gear lock out?

Oh Yes!
IHC used some sort of lock out mechanism when they installed steel rear wheels at the factory due to rubber shortages or owners request.
You couldn't control the thing on rear steel wheels at 15 mph, even if you could stay in the seat! So they rigged it up somehow to not go into 5th gear.
That's why I'm asking around to see if someone else has had the experience and how to get rid of that lock out. That's why I'm thinking that I don't really have tranny troubles.
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Old 11-26-2011, 10:28 PM   post #6 of 15
Poppa Dave
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Default Re: 5th gear lock out?

Okay.
I spent the day on line trying to find the answer to this and I think that I found a referance to the problem.
There is a bolt that is longer than normal somewhere on the transmission, that prevents the 5th gear from going in. Something about blocking the 5th gears sliding tranny shaft.
Does anyone know what bolt it is?
Where is that bolt?
How do you get at it?
What size do you replace it with?
Have I missed anything?
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Old 12-09-2011, 11:15 AM   post #7 of 15
jpcubs
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Default Re: 5th gear lock out?

The bolt is to the left of the streeing post. back it out an see if it will go into 5th.
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Old 12-09-2011, 03:26 PM   post #8 of 15
cyrush
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Default Re: 5th gear lock out?

Hi Dave, this is what u need see item 18 !!!!
Attached Files
File Type: pdf FARMALL H 5th speed lockout .pdf (184.6 KB, 344 views)
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Old 12-09-2011, 07:51 PM   post #9 of 15
Poppa Dave
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Default Re: 5th gear lock out?

Oh You have to be kidding me!!!
It a bolt up on top of the tranny!!!
Holy Cow Batman. I thought that I'd have to take the thing apart to "fix" the problem and I wasn't any to sure I wanted to tear into the gear box quite that badly.
Well many well placed Thank You's for your info.
I have spent some time looking at my book and didn't catch the #18 as I was always looking for a big nasty looking ol' part that I thought would have been down inside the thing.
I'll pull the bolt tomorrow morning and let you know if that fixes the problem. I'm sure that it will based on your info.
Thanks Again!
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Old 12-11-2011, 12:27 PM   post #10 of 15
cyrush
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Default Re: 5th gear lock out?

Hi Dave !! how did you get on ????
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Old 12-11-2011, 03:56 PM   post #11 of 15
Poppa Dave
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Default Re: 5th gear lock out?

Finally got some time today to give it a whirl.
Sure enough. That stupid bolt does something to the tranny. 5th works just fine now.
In fact, I took the old H for a drive to town for some gas around noon today. Dang near froze to death, but it's a nice day for the first part of December.
The old girl went through her paces without any problems in any of the gears, even going up and down the hill between the home place and town. The wheel's tight with no wobble from the front end and the brakes work, but aren't as tight as I'd like.
The more time I spend with this old machine, the more I love it!
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Old 12-11-2011, 04:03 PM   post #12 of 15
cyrush
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Default Re: 5th gear lock out?

As an EX IH company service manager, glad to have been of help !!
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Old 12-11-2011, 11:18 PM   post #13 of 15
Poppa Dave
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Default Re: 5th gear lock out?

Thank You for your info....
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Old 12-12-2011, 02:00 PM   post #14 of 15
cyrush
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Default Re: 5th gear lock out?

Although the "H" is before my time, the info was'nt too hard to track down with 33 years experience of IH parts books and the current CNH web catalogs ????
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Old 12-13-2011, 10:36 PM   post #15 of 15
Poppa Dave
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Default Re: 5th gear lock out?

Checked it out today.
I had no idea that they had on line books for these old tractors.
So cool.
Thanks
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