[AJD] H Tranny

[Bill Brueck]

Did you get this worked out yet, Karl?

I have the same model.  As you've discovered, after serial 10000 they added 
a separate casting for the left bearing for this shaft.  I just looked at my 
IT manual and it doesn't even acknowledge the earlier setup. I suppose the 
official JD shop manual might help, I don't have one of those but have found 
the parts manual to be very helpful to get the restoration process close to 
right.

I had mine apart in the process of restoration a couple of years ago, I 
remember this cap screw being hard to get loose, but I'm pretty sure I must 
have pulled the shaft out the left side of the casing when I got done.

Let me know if I can stare and compare anything on my machine for you.

B²
Bill Brueck (brick)
Chatfield, MN, USA

----- Original Message ----- 
From: "Karl Olmstead" <olmstead at ridgenet.net>
To: "Antique John Deere mailing list" 
<antique-johndeere at lists.antique-tractor.com>
Sent: Saturday, January 29, 2005 10:36 AM
Subject: [AJD] H Tranny


> It was raining yesterday, so I got a chance to work on that '39 JD-H 
> instead of my house.  I spent a few minutes trying to move the shifter 
> forks with no success.  They aren't seized up, but the upper fork (1st and 
> reverse) appears to be stuck to the left beyond first gear, and it has 
> shoved the lower fork into some gear; the net result being that the 
> transmission is in two gears at once.  Tractor won't roll.
>
> I finally came to the conclusion that I need to pull the shifter shaft and 
> the shifter forks, so that I can reach down below them and re-position the 
> sliding gears myself.
>
> As Frank G. warned me, the '39 H tranny is different from later models. 
> For example, later models have a 'shifter shaft bearing' bolted to the 
> left side of the transmission case.  The '39 simply has a hole in the side 
> of the case.
>
> At any rate, after loosening the set screw and unscrewing the 'lock 
> screw', which seems to serve no purpose, I attempted to undo the adjusting 
> screw, which screws into the left side of the transmission case and 
> tightens down on the end of the shifter shaft.  No go.
>
> I took the opportunity to make a special tool for the job on my vertical 
> mill.  3/4" drill rod, with one end milled into the shape of a 1/8" wide 
> screwdriver blade, the other end made hexagonal so that I could put a 
> wrench on it.  Nothing beats quality time spent using macine tools!  Tried 
> out the new tool, but the blade began to bend.  Guess I'll have to take 
> the time to heat treat the tool before I try again.  And soak the screw 
> with penetrating lube.
>
> Am I headed in the right direction?  I am assuming that the adjusting 
> screw has to come out before I can remove the shifter shaft, since the 
> screw presses on the end of the shaft (and plugs up the hole through which 
> the shaft must pass).
>
> -Karl
>
> _______________________________________________
> Antique-johndeere mailing list
> http://www.antique-tractor.com/mailman/listinfo/antique-johndeere
>