Cub alternator

   / Cub alternator #1  

oldcub

New member
Joined
Jan 16, 2005
Messages
10
Location
South Central Jersey
Tractor
IH Cub
I replaced the existing alternator on my Cub with a 20-102-1 (Lesters 2117) 63 amp one wire alternator from Nations Starter/Alternator. When I kick up the rpm's a little to excite it and it starts charging, it makes a loud high pitched rubbing noise. Putting a sounding rod on it doesn't indicate any of the bearings a bad. I am thinking the shaft has flexed enough to make the fan rub the housing when it is loaded. Any suggestions besides spending more for a Delco?
 
   / Cub alternator #2  
Did you use the same belt..?? If it has been on there a while, and a bit dry, it may squeal a bit like a bearing. If it's in the wide open, you can take a bar of soap, and rub on the belt when it's running at idle. Or, just a spritz of WD-40 on the belt will make it stop for a bit, to let you know for sure, if it's the belt, or something else.
 

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