??? Sounds like a gasket needs replaced. The only thing I buy from Powrflight is floor pads.
It pays to buy brand name floor machines. I have a Clark 175 that is 30 yrs old, has been though hell and is still going.
Looks like there has to be a shaft from the motor to drive head. Probably some bearings and seals around the shaft that failed.
Question is can they be replaced without replacing the motor?
I've been looking at the manuals online for all the various PF floor machines, just to see if I can find anything that could lead you in the right direction. I cannot find a blow out of the motor(s) any where. Best I can tell you would be to contact PF directly. Sorry man. :|