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Topic: The mystery of user Geomm and #4612 Explained - Intro and Ask for assistance (Read 3126 times) previous topic - next topic

Re: The mystery of user Geomm and #4612 Explained - Intro and Ask for assistance

Reply #100 –
Quote from: Protech Racing –
 
 Remove the outer bearing and use an eye loop to check for scratches .  Finds any and toss all of them, after noting the bearing numbers on the pieces.   

You may also see black spots on the rollers, caused either by rust or the metal spalling.*

* Spall - Wikipedia
1992 Foretravel Grand Villa
U225 SBID Build No. 4134
1986 Rockwood Driftwood
1968 S.I.A.T.A. Spring
1962 Studebaker Lark
1986 Honda VF700C
1983 Honda VF750C
Charlie, the Dog was broken out of jail 24 Oct 2023
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AA1OH (H)e who must be obeyed.

Re: The mystery of user Geomm and #4612 Explained - Intro and Ask for assistance

Reply #101 –
Quote from: GeoKM –
Thank you for the photos.

I have seen some of the pre-load debate, I still do not understand it, one of the reasons I am thinking best left to professional.
Wheel Bearing Pre-load
Yes preload can be difficult to accurately attain. Probly the main reason the manufacture stays away from preload is that your at .001" preload your at the best possible state.
 At .002" preload you have dropped to 60% of rated life down from the peak of rated life.
 At a loose end play of zero you have dropped gone to 115% rated life.
At a loose end play of .001" you have dropped 110% rated life
At a loose end play of .002" you have dropped down to 97% rated life
At  a loose end play of .008 you finally drop down to 50% rated life
From peak life one thousandth tight drops you to 60% rated life
From peak life nine thousandth loose to reach 50% rated life
Loose is critically better than too tight by one thousandth.
Also no one has mentioned the fact that your adjustment is made with two nuts. There IS free play between the nut and the axle threads and once the first nut is installed, the locking washer is placed and the second nut is torqued against it pushing it to a unknown preload value.
This is resolved with the single axle nut and lock ring

Re: The mystery of user Geomm and #4612 Explained - Intro and Ask for assistance

Reply #102 –
I am curious, what ever happened? Did mobile mechanic get you on the road? Did you tear it down yourself? Updates please  8)