Posted by Daniel Patterson on March 11, 2009 at 05:48:36 from (76.19.123.208):
Good morning, I just completed a ring job and valve job on my "67 Ford 3000 gas tractor. After I reassembled it, with all new gaskets of course, I checked the compression before adjusting the valve clearance just to make sure things were sealing properly. I got 140-150-155 for readings, a lot better than the 60-105-75 before. Then I preceded to adjust the valves as per the manual. When I was done adjusting the intake to .017 and the exhaust .021, I checked compression again (I checked compression because I thought it was odd that my tractor had about .060 of valve clearance and therefore I had to take up a lot) and adjusting my valves the compression dropped down 95-100 psi in all cylinders, I have two gauges and they both were giving the same reading. If I back off the adjusting nut by 1/2 turn I can get my compression right back up to the 150 range. The valves do open and close at that greater clearance. Any thoughts? I am thinking I may run it with more clearance.
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Today's Featured Article - It Can't Be Done! - A Tractor Story - by Neil Campbell. I'll never forget the time back when I was a boy baling hay on our Farm in Big Rapid, Michigan. The most memorable event that took place was a trip up the steepest incline on the farm pulling an old New-Idea baler with a pony-motor for power and a haywagon. I had just talked my Dad into buying an old John Deere B with 6-speeds ahead and I was real proud of it, except it was a little smaller than the Case tractor that we normally
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