Webster Hydraulic Fan Motor

[davidbrady]

Judging from the schematic I think so Tommy; a failed Webster Relief Valve could prevent the fan from getting pressure; although, I don't know the internal workings of the relief valve. Also it took time to pump all the hoses full of hydraullic fluid when the engine was first started. This along with moving the steering wheel may have allowed the pump to survive for the duration you mentioned.

Tommy, it'd still be very interesting to take a close look at the failed 8V92 PTO splines. I'd like to see if the failure looks like a sudden fracture or a gradual wearing away. This will tell us if the two failures are related to the same cause.