Posted by HFP on March 25, 2020 at 21:07:26 from (207.177.127.103):
Working on a 36 John Deere D we picked up about a year ago. All original paint, but appears to have been worked on/cobbled together at one point. I like original paint tractors so we picked it up. Hadn’t run for several years. Got it home and among other things had a stuck exhaust valve on #1 side. Pulled valve cover (which doesn’t allow much to see on these for those who haven’t seen one) and sprayed down good. Pulled spark plug and sprayed from that side as well. Then we let it set with another round of two of spraying for a year or so.
On these tractors you can tap the valve down via pry bar, but can’t really get ahold of it to pull back up.
After some thought, and trying a couple other things, we came up with this. Drilled a hole at the balance point in a deep well socket. Then hooked some baling wire in it and made a stop. Then dropped it in the hole and flipped it 90 degrees. Turned the motor over and bumped the valve up with the piston (by hand). Move socket out of the way, turn over, spray, repeat, repeat, repeat....
I did pick up a cheap borescope a few weeks ago, not sure we could have seen enough to make this work without it. I’ll post a couple pics. Socket dropped in bore. Piston up to socket. And valve pushed up.
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