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Recent content by macandmall

Yesterday's Tractor Forums
  1. M

    John Deere a cam duration

    I decided to take it apart anyway. I found that the cam timing was retarded. Intake center of lobe was at 110, now is 96. The exhaust valve was closing after the piston passed tdc, more than an inch down the bore, and the intake begins to open just as the exhaust closed. I advanced the cam 1...
  2. M

    adjust cam timimg on JD B

    Here it is pulling in 3500#. My Son recorded it on my phone, not very good quality video. It spun out at 255', right where most of the others stopped. The winner was an Oliver 70, went 263'. I'm very happy with the power now. http://www.youtube.com/watch?v=DZ_1jAGU4t8&feature=youtu.be Scott
  3. M

    adjust cam timimg on JD B

    I decided to take it apart anyway. I found that the cam timing was retarded. Intake center of lobe was at 110, now is 96. The exhaust valve was closing after the piston passed tdc, more than an inch down the bore, and the intake begins to open just as the exhaust closed. I advanced the cam 1...
  4. M

    adjust cam timimg on JD B

    I got a dial indicator and degree wheel. The centerline of the intake cam is 110 degrees. The new owner of the shop found some specs for a B grind the previous owner had, and thought it should be 105-110. I think part of my problem is my tires. Old style 12-38's. They are too tall and it's just...
  5. M

    adjust cam timimg on JD B

    I didn't get any specs from the cam grinder. Up until now, I didn't know the timing might be off after the re-grind. I want to check the timing, but don't have a dial indicator. A pulling friend down the road might have one, but then it will be kind of a guess because the shop that ground the...
  6. M

    adjust cam timimg on JD B

    So the manual is correct. That is the procedure the manual says to do. Was hoping someone had found a shortcut after all these years. Thanks, Scott
  7. M

    adjust cam timimg on JD B

    I have the gov off the left cam bearing out, I can get the tooth about half way out of mesh, but that is it. Not sure which direction you mean to "push in on cam. I removed the rocker form the head so the pushrods are not pushing on the lifters.seems like the oil pump gear is holding things up...
  8. M

    adjust cam timimg on JD B

    That's what it seems like. With the left cam bearing out, I can move it away from the crank a little but not enough. The only way to get at the right cam bearing is to pull the clutch and the big primary reduction cover. Not what I want to do to my nice painted restoration.
  9. M

    adjust cam timimg on JD B

    Can you move the cam on a JD B without removing the clutch and primary reduction cover? I want to advance the timing of my re-ground cam.
  10. M

    John Deere a cam duration

    I've got some homework to do, get the specs for the cam, check compression, but it is probably around 7 to 1 Scott
  11. M

    John Deere a cam duration

    I have a '41 B I rebuilt in 2007. I had it bored .090 over, aluminum pistons from hinrich's, rebuilt the head with new valves and guides, shaved .100 off the head, and had custom built from Algona regrind the cam with their "puller grind". They remove material from the back side of the lobe...
  12. M

    John Deere a cam duration

    I have a "41 B I rebuilt in 2007. I had it bored .090 over, aluminum pistons from hinrich"s, rebuilt the head with new valves and guides, shaved .100 off the head, and had custom built from Algona regrind the cam with their "puller grind". They remove material from the back side of the lobe...
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