Webster Hydraulic Fan Motor

[davidbrady]

Tommy,

I pulled this pic out of your previous Hydraulic Pump Thread:

Although it's not quite a close-up of the sheared splines, it does show a lack of fretting or long term grinding wear on the intact splines. This is more evidence that the damaged splines were catastrophically fractured which leads me to believe that we're on the right track - the two failures are probably due to the same cause and if you threw a new pump at it you'd probably damage that one too!