Shaft end play - from bad to worse
Posted August 22, 2010 - 09:11 AM
While checking out the clutch by directly applying 12v, I was dismayed to see the engine output shaft moving in/out. I put a dial indicator on it and got .025" vs the spec of .002/.014. You can grab the output shaft and move it in/out and hear the dull metallic clunk when it bottoms out. I don't know if this is my sound but I am worried about this excessive end play. I already bought the mower deck and probably need a new clutch ($250). Do I need a major engine overhaul?
According to the service manual, the standard thrust washer is .030" and the largest one available is .039", not nearly enough to take out this excessive end play.
Any ideas about how I should handle this end play? Thanks.
Posted August 22, 2010 - 12:17 PM
Posted August 22, 2010 - 01:24 PM
That is a lot of end play, and may need tended to. As to available thrust washers, you have to remember yours is likely worn thinner, so a new .030 washer may get it within specs, & surely a .039 would get it well below max clearance.
Yep. I wonder if I can split the crankcase in two without removing the cylinder barrels? I want to do the minimum tear down possible.
I think I know what caused the problem. The electric clutch was sticking on the output shaft. That is why the output shaft was moving when I applied voltage to the clutch. Now that everything is cleaned up, the clutch slides up and down the shaft freely when it is engaged/disengaged. I was really working that thrust washer hard. I'm not sure if my engine has a thrust bearing in addition to the thrust washer. Some Magnums do if they are for high thrust applications. I don't know what a high thrust application is but I doubt if mine is.
Olcowhand, did you ever tear down a Magnum? Any tips/ Thanks.
Posted August 22, 2010 - 01:43 PM