Posted by paulinkansas on April 06, 2012 at 08:51:59 from (68.103.68.211):
It's a 23 horse 2 cylinder air cooled Onan NHC engine in a Deere skid steer. A while back I posted on here about the problem. The engine has 2 separate exhaust headers and 2 mufflers. When running the engine at night, one header gets red hot within 30 seconds and a steady blue flame can be seen in the muffler. I followed advice on here and checked the exhaust valve tappet clearance. I could not get a .004 feeler gauge to slip between the valve stem and the tappet. The proper clearance is .012.
That was the problem. The exhaust valve was not closing when it should. There was an adjusting screw, and I turned it as far as I could before it bottomed out. The clearance was .008 and the engine ran good for a few weeks.
Now I have that problem again. The valve isn't closing all the way and flames are coming out that cylinders exhaust. The adjusting screw for the exhaust valve can not be turned any more. It's the top valve in the picture. The bottom valve is the intake, and you can see where there is room to adjust that valves clearance.
What should I do in order have the proper valve clearance? I thought about grinding off about 1/8" of the valve stem, then I would have some leeway with the adjusting screw to get the proper gap.
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 - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
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.
