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Re: Proper Spline Mesh
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Posted by Joe (IN) on January 06, 2005 at 13:13:12 from (66.73.129.130):
In Reply to: Re: Proper Spline Mesh posted by Rod (NH) on January 06, 2005 at 10:04:42:
Wow! Thanks Rod! That's more info than I ever hoped for. The PTO shifter assembly is a casting that mounts directly to the rear of the countershaft on the transmission. The coupling is a spool riding inside the casting that is slid forward by a fork when the PTO is engaged to couple the PTO shaft to the countershaft. It is a sliding spline configuration, but only without power supplied to engage the drive end splines. When it's running, it should stay in a static position. I'm not sure about the PTO shaft strength, but I do know that the hardness of the coupling was measured at 55 Rockwell. I suspect the shaft is similar. Incidentally, The drive end splines are slightly larger and finer at 1 3/8" and they are only 3/4" long to begin with. About the only two PTO driven implements I can ever anticipate using are a bush hog and a tiller. I suppose that I could risk it and make darn sure that I was using a soft shear pin in the external PTO shaft.
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