Vacuous_One
New member
I've got a PT422 with the Robin 22HP engine, bought new circa 2001. I replaced one wheel motor and front hub in 2005 and now I've got one in the rear that's probably going to need both hub and motor replaced and the other's not far behind. (Haven't checked the other front one yet, but will soon...expect I'll have similar issues with it.)
In all cases, the keyway on the motor shaft is rounded over, the keyway on the wheel hub is worn away until it's virtually non-existent, and whatever key is left (if any) is essentially round. The motor shaft is scored and the wheel hubs are "extruded" around the shaft area and scored/worn at the shaft interface.
The wheel bolts and motor/hub castle nut are tight and in good shape (except for wear on the catle nut/hub from the wheel rotating due to-apparently-loss of the key).
Has anybody else had this kind of wear/issue? I'm not really pleased having to replace wheel motors and hubs every 2-3 years!
In all cases, the keyway on the motor shaft is rounded over, the keyway on the wheel hub is worn away until it's virtually non-existent, and whatever key is left (if any) is essentially round. The motor shaft is scored and the wheel hubs are "extruded" around the shaft area and scored/worn at the shaft interface.
The wheel bolts and motor/hub castle nut are tight and in good shape (except for wear on the catle nut/hub from the wheel rotating due to-apparently-loss of the key).
Has anybody else had this kind of wear/issue? I'm not really pleased having to replace wheel motors and hubs every 2-3 years!