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Looking for splined coupling

J

John from NH

Member
Finally got around to removing my Big Mo 500 hydraulic pump and found the splined coupling at the pump had stripped. The part number from my manual is 10A13077. Would anyone have an extra one laying around or know where I might purchase one? I also searched the industrial supply companies and didn't come up with anything close.

Thanks for any help!
John
 
I know exactly what you are talking about. My big MO 500 coupling came loose, actually mine got off center so one side spun on the shaft. I just shimmed it up so it would stay near the center. Now I can't remember if it was the size of a PTO shaft, probably smaller. Since you have a part number, maybe some other tractor used that. Maybe hydraulic pump drive? I am going to check a 445 parts book.
 
10A13077 "sleeve" is used on hydraulic pump to the drive shaft on the 445, jet star, four star and the four star super. Maybe others. Other books I looked at and did NOT have that sleeve were : U302, M670, 602, 900, "U". Used parts yards might be a good bet for you.
 

Thanks for the offer. After further investigation, and it's a long story, it wouldn't do me any good to replace the coupling until I figure out why there's so much fore and aft play in the drive shaft and why the end of the pump shaft has been ground down. The drive shaft can move far enough forward that there's less than a .25 inches of the pump shaft and drive shaft still engaged in the coupling.

John
 
I think that is the way it is. That "sleeve" is about an inch too short. The other end of the drive shaft is splined too and is up against the flywheel. I used washers to keep it centered on mine. The splines on the sleeve were ground a bit at one end. I cleaned it up and used it. Are some of your splines on the sleeve completely ground off?
 
There's less than .125 of the splines that are stripped away completely and another .125 that is rounded over.

Where did you put the washers to keep the drive shaft pushed to the rear?

John
 
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