John Deere B 1949

[ZigZag]

Hello - I have a JD B that is very stuck. Ive done the soaking and the rocking and the flywheel crowbar with weights etc. I recently took the head off to find an absolute mess. Ive cleaned out the jugs best I can and still no budge when rocking tractor. I have taken end caps off left and one off the right but have one nut that is positioned in a very tough spot where I could only get a box end wrench in but have very little leverage. If I don't get that nut off,, I have no idea what to do next. I have also noticed that when rocking the tractor I still have barely any movement on the flywheel. Is it possible that I could have a stuck crank as well? Im just surprised by how little play I have. Anyway any ideas welcome on getting last end cap off or how to get just a teeny bit of movement would be appreciated. Thank you in advance!

 

[Loosehandle]

Take the block nuts, upper coolant pipe off and hopefully get the block to move ahead a little, crankshaft should turn.

 

[MSD]

Take the block out, turn it upside down and fill the cylinder with water. Let it soak for a week and tap them out. Works great, better than the other penetrants out there. Be careful rocking the tractor back and forth to loosen them. I did that one time and flattened the bearings out.

 

[ZigZag]

If I can ever get the block separated, I will try. My big problem is getting one of the end cap screws off which is in a very awkard position.

 

[greenmech]

If you have one rod cap off you can push the block out with the other. Ron MN

 

[55 50 Ron]

What do you mean when you say end caps? Is that in reference to connecting rods? If it's stuck that bad there shouldn't be any movement of the flywheel.

I freed a 1942 B by setting a hydraulic jack against one of the cogs on the flywheel where the starter drive normally engages.

 

[ZigZag]

I will definitly give that a try. Not sure when I will get at it, but will report back when I do.

 

[ZigZag]

Success! I got the cylinder off with one piston attached and the other removed. Now the question is,,,, how do I get the cylinder to drop out of the bottom? Do I need to twist it and remove the studs?

 

[NoDakInMN]

Well, now that the block is out, you have lot of options. But I think I would start with a method that is the most gentle and work up from there. What I mean by that, is don't start by putting it in a press and applying a bunch of pressure. That runs the risk of having things come apart with a big bang, which could damage things you might not want damaged. I would start with setting the block with cylinders verticle and the head face on top. Then apply Liquid Wrench or some other penitrating solvent. Tap the piston with a block of wood and a hammer to help work the solvent down. Keep repeating the process for a number of days. Eventually you should see the solvent come through on the underside. Then you can get more agressive with the hammer and block of wood. If that fails to do the job, then try things that can put more pressure on the piston.