The lower (seal) bearing in the Weldon electric fuel pump (c8100f) repeatedly failed.
The bearing failure was caused by fuel leaking from the pump shaft seal into the evacuation chamber at a rate which exceeded the chamber drain capability.
Hence the lower bearing becomes fuel saturated.
The fuel pump evacuation chamber contained (and all leaking fuel leaves) a red residue.
The residue looks like rust and the failed bearings acts like it is rust (binding).
Removal and examination of the fuel screen, residual fuel from the filter, and fuel screen internals show the same red residue AND it looks like someone took a dump in the fuel inside the fuel screen housing.
I know for fact that ALL fuel which has been introduced to this airplane has been carefully filtered AND run through a water separator.
So where in the hell is this trash coming from? Anyone know? Is there any Iron in this mess of a fuel system?
The bearing failure was caused by fuel leaking from the pump shaft seal into the evacuation chamber at a rate which exceeded the chamber drain capability.
Hence the lower bearing becomes fuel saturated.
The fuel pump evacuation chamber contained (and all leaking fuel leaves) a red residue.
The residue looks like rust and the failed bearings acts like it is rust (binding).
Removal and examination of the fuel screen, residual fuel from the filter, and fuel screen internals show the same red residue AND it looks like someone took a dump in the fuel inside the fuel screen housing.
I know for fact that ALL fuel which has been introduced to this airplane has been carefully filtered AND run through a water separator.
So where in the hell is this trash coming from? Anyone know? Is there any Iron in this mess of a fuel system?