arlen4720
Veteran Member
- Joined
- Jul 6, 2012
- Messages
- 1,280
- Location
- Southeast Minnesota
- Tractor
- JD 4720, JD X748SE, JD 997, Farmall "B", Gator 865R, JD 320D Skid Steer
Well, I'm mildly panicking...hopefully for nothing.
I'm rebuilding a Farmall B, and have had my share of struggles.
It seemed fairly obvious to line my cam gear up with the punch on the crankshaft gear. I noticed at the time that #1 was not at TDC, but a few deg past TDC on the intake stroke. I thought it strange, but I haven't worked on one of these before.
There was a clear single punch on the crank gear, and a clear single punch on the cam gear, and a double punch on the cam gear 180 deg from the single punch. I checked, double checked and went on my merry way and installed the front cover and pulley.
Then I was watching a Youtube video from the Canadian Redneck and he casually mentioned that when you time the governor to the cam by lining up the double punches that #1 will be at TDC at that point. He didn't specify if it was compression of exhaust stroke.
Mine is not that way. I was hoping if someone can confirm if it truly is at TDC when the marks are all in line. And could you confirm if compression or exhaust.
Here is a picture of the governor gear lined up with the double punch on the cam gear. Here #1 is a few deg past TDC on the intake stroke.
Here is a pic of the mark that I lined up with the crank punch mark. Here #1 is a few deg past TDC on power stroke. The marks are a little puzzling here, but that big mark is 180 from the very clear double mark of the 1st picture. There are actually 4 marks here on the cam gear if you look close!
I hope I am just confused.
I should note that the crank was not the original, but the Cam and governor are the originals.
I'm rebuilding a Farmall B, and have had my share of struggles.
It seemed fairly obvious to line my cam gear up with the punch on the crankshaft gear. I noticed at the time that #1 was not at TDC, but a few deg past TDC on the intake stroke. I thought it strange, but I haven't worked on one of these before.
There was a clear single punch on the crank gear, and a clear single punch on the cam gear, and a double punch on the cam gear 180 deg from the single punch. I checked, double checked and went on my merry way and installed the front cover and pulley.
Then I was watching a Youtube video from the Canadian Redneck and he casually mentioned that when you time the governor to the cam by lining up the double punches that #1 will be at TDC at that point. He didn't specify if it was compression of exhaust stroke.
Mine is not that way. I was hoping if someone can confirm if it truly is at TDC when the marks are all in line. And could you confirm if compression or exhaust.
Here is a picture of the governor gear lined up with the double punch on the cam gear. Here #1 is a few deg past TDC on the intake stroke.
Here is a pic of the mark that I lined up with the crank punch mark. Here #1 is a few deg past TDC on power stroke. The marks are a little puzzling here, but that big mark is 180 from the very clear double mark of the 1st picture. There are actually 4 marks here on the cam gear if you look close!
I hope I am just confused.
I should note that the crank was not the original, but the Cam and governor are the originals.