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Super C governor keeps eating thrust bearings

M

mkirsch

Well-known Member
Stupid Super C is stuck at wide open throttle again...

IIRC last time the thrust bearing/washer in the governor disintegrated. We chalked it up to 60 years of wear and tear.

Less than a year later, and probably only 20 hours of operation, it looks like it did it again!

What's causing this? I'm getting good at pulling the governor, but I really don't want to.
 
What oil supply? What oil hole? What journal surface?

This is the small washer-shaped thing that slips on the end of the governor shaft between the flyweights and the fork inside the governor housing.
 
Sorry was thinking main bearing.
Thrust washers fail from not being centered, from not being between parallel surfaces, and from lack of lube. A combination take the toll faster. A bent governor shaft would be a first look to me. Jim
 
The oil is splashed from the gear that runs off the cam gear. Have you replaced the bushing in the timing gear there are oil holes for it to get lube. When you remove the gov housing there should be oil in the housing if it shows no sign of getting any oil maybe you should remove the gear. Before you remove it get the dots lined up on the cam gear and that gear. There ill be two dots on the cam gear and they align with the two dots on the timing gear that runs the mag or dist which ever you have. I have never seen the thrust bearing you have run dry most are gummed up from years of sludge but you do have a problem if that bearing is failing.
 
You also need to check and make sure the pin in the end of the shaft that the bearing runs on is free to slide in and out. It runs on a little raised area on the inside of the housing. I had to soak mine in PB for 2 or 3 days to get it out. There is a spring behind it that also needs cleaned up. It is used to take up the slack as the shaft moves back and forth. There is also a small hole in the shaft to let oil into the spring area.
 
Good point. That tensioning spring keeps light spring pressure on the shaft. If stuck, the bearing might not be held together. Jim
 
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