[AT] Late JD B Camshaft Removal

[Al Jones]

Dean,

I handnt thought about going ahead and loosening up the crank.  That will surely be easier; it’ll give a lot more access to the camshaft.  It’s gonna have to come off anyway.....

Thanks,
Al

Sent from my iPhone

> On Dec 4, 2017, at 2:21 AM, Dean VP <deanvp at att.net> wrote:
> 
> Al,
> 
> I've been on the road so I may be missing some critical data.  We can assume
> that you cannot rotate the crank after you have removed the rod caps and
> bolts? Correct?  Are you sure you won't be able to rotate the crank a little
> bit when you start pulling the block away from the main case?  It would seem
> to me that after pulling the block away from the main case a little bit that
> when one crank journal is tight against the rod bearing that the other rod
> should be loose enough to come away from the crank journal. Then you should
> be able to turn the crank to get the other rod away from the crank journal?
> Its been awhile since I've had a B apart and then it was an earlier B so I
> don't know if things are a tighter fit or not.   Removing the cam bearing
> and disengaging it from the gear is a PITA.  Would it be possible to just
> loosen up the two main bearings  and move them back a little.  You probably
> are going to have to re-grind the crank shaft anyway so you are not wasting
> any effort.  The holes that will be come open when you loosen the main
> bearings are quite large and will allow you to move the crankshaft around
> quite a bit.  My mind is a little dull after driving 7 hours so I may not be
> thinking straight.
> 
> Dean VP
> Snohomish, WA 98290
> 
> -----Original Message-----
> From: at-bounces at lists.antique-tractor.com
> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Al Jones
> Sent: Sunday, December 3, 2017 5:54 PM
> To: Antique tractor email discussion group <at at lists.antique-tractor.com>
> Subject: Re: [AT] Late JD B Camshaft Removal
> 
> Guys, did this go through?  Just making sure.....
> 
> Al
> 
>> On Sat, Dec 2, 2017 at 7:36 PM, Al Jones <farmallsupera1 at gmail.com> wrote:
>> I made a little more progress on our basket case '51 B John Deere, 
>> which I affectionately nickenamed "Madness."  (When I was little it 
>> was also known as the "Putter Putter" but that's another story.) 
>> Anyhow the pistons are stuck, I'm working on taking the block and 
>> pistons out as one unit.  It looks like the left hand connecting rod 
>> is going to contact the camshaft before it comes out.  I've been 
>> reading in the JD service manual, and it looks like that if I take the 
>> camshaft bearing housing loose, I can waggle the shaft enough to get 
>> the camshaft gear out of mesh from the crank, and turn it so I can 
>> take out the capscrews holding the gear to the shaft. Then once the 
>> gear is off the camshaft, I can slip the shaft out.  The instructions 
>> are not really clear.  Am I missing anything?  Any tips or tricks?
>> 
>> Thanks,
>> Al
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