[AT] JD B Problems: More Info

[Brian VanDragt]

The service manual published by John Deere for the B has a good transmission section in it.  I have one at home that I will dig out after work.  If one of the forks was shifted into gear, I don't think you would be able to run the shift lever up both sides, but it has to be in a gear to make the tires turn.  Can you see that all of the forks are engaged in a groove on a gear and that no forks are broken allowing a gear to slide along the shaft on its own?  I don't have any other ideas right now.  I've only worked on the 4 speed transmissions.  It sure is easy to see what is going on when the rear axle is off and the differential is out, but you have more gears and forks and it is probably hard to see them all through the top cover. 

Brian 

----- Original Message -----

From: "The Allen Family" <steveallen855 at centurytel.net> 
To: AT at lists.antique-tractor.com 
Sent: Tuesday, September 3, 2013 12:38:27 PM 
Subject: [AT] JD B Problems: More Info 

Brian, 

Prying on the main fork is how I got it freed up.  I am reluctant to pry too much because I don't want to score the bars or break the cast forks.  ALL the forks rock a little on the bars. 

But the important point is, yes:  the tires turn when the pulley is turned no matter what position the forks are in. 

I have the cover off.  The main fork is on the front/top of the group, then the 1/2/R, then the 3/5, then the 4/6.  The 4/6 fork moves just fine when the main fork is on the 6 side (and everything is lined up) but not when it is on the 4 side.  When I set the cover with the shift lever back on it, I can make the shift lever travel the bottom cross passage and up both side, but I can only get the lever to go in 6th gear.   

No matter what position the lever or the forks are in, the tires always turn when the pulley is turned.  That's what stumps me. 

I hope my descriptions are adequate; I know how hard it can be to visualize this stuff. 

The "original" Steve Allen 

PS  Dean, I got a replacement disk from John Boehm.  He had one in REAL good shape. 

------------------------------ 

Message: 2 
Date: Mon, 2 Sep 2013 23:10:29 -0400 
From: "Brian VanDragt" <bvandragt at comcast.net> 
Subject: Re: [AT] JD B Problems: More Info 
To: "'Antique tractor email discussion group'" 
<at at lists.antique-tractor.com> 
Message-ID: <015401cea853$2610a4e0$7231eea0$@comcast.net> 
Content-Type: text/plain; charset="US-ASCII" 

Steve, 
Some gears should be turning with the pulley even when it is in neutral. 
The gears that are turning will not be meshed with another gear to make the 
wheels turn though. When the shifter forks move gears in line with each 
other, then the power will continue to the wheels. Do you have the top 
shifter cover off so you can see what is going on? If you have the top 
cover off, use a pry bar to try to move the forks. If the forks are rusted 
to the shafts or the detents are rusted, you won't get any movement. If 
something is out of place, you would probably see some movement in the forks 
until something else interferes. When you turn the pulley by hand, do the 
wheels want to turn? 

Brian 
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