PTO/Hydraulic Pump

[GregOConnor]

What takes out the oem pump shafts, maybe that is where the work needs to be done. Maybe it it the abrupt start up of the fan. That action is just plain scary for me. This is why I cycle my fan on with low rpm before I head up a grade. I don't want the temp sender to start up the fan when the bus is in high rpm.
While under factory warranty, a charge pump on one of my Skidsteers was replaced 6 times /(2,000 hours). Once out of warranty I called the factory and asked a tech for advise and a reason why. She advised me to replace a valve in the block that is designed to place a phantom load on the pump to keep it from chattering. it was not the spline that had failure.
Startup is where hoses are broken and fittings are turned loose.