Posted by Tom in TN on July 24, 2013 at 12:15:25 from (75.149.99.233):
I am working on a Gravely walk-behind tractor/mower for a friend of mine. It is the old "L" style tractor that was new in about 1964 or 1965.
The exhaust valve is binding badly. It will come up when I turn the engine over, but will not go back down. If I rotate the engine so that the intake valve is open, I can tap the exhaust valve back down, but it takes a pretty good tap using a piece of 2 X 4 lumber and a mallet.
I have soaked the valve stem for about four days using PB Blaster. I can turn the valve using a pair of pliers, but it turns really hard.
I've turned the engine over and tapped the valve back down into the engine about 20 times and it is still really stuck.
The mower sat outside in the rain. One of the head bolts has been twisted off and there was definite signs of rust inside the head and on the exhaust valve.
Any ideas short of pulling the cylinder and removing the valve from the block?
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Fire in the Field A hay fire is no laughing matter-well, maybe one was! And a good life-lesson, too. Following World War II many farm boys returned home both older and wiser. One such man was my employer the summer I was sixteen. He was a farmer by birth and a farmer by choice, and like many returning soldiers, he was our silent hero: without medals or decorations, but with a certain ability to survive. It was on his farm that I learned to use the combination hand clutch and brake on a John D
... [Read Article]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.