WTB hydraulic pumps
 

Both of my pumps were returned from qaa as unserviceable. No luck on locating replacements within reason. Any serviceable cores available ? Alternate Part numbers ? Many accessory overhaul shops cannot get parts. My quote was over 3000 each for overhauled units without cores. This may ground a few of us unless a source for parts or alternate part can be located.

What is the nature of the problem with the pumps? They can't be overhauled?

Pumps.
 

Originally installed on aircraft and would not build pressure in system when cycling gear handle. Tried engine run then drill with aircraft on jacks. QAA stated that cases, gears and a shaft were out of spec. I had them return units to me which they did without data plates. As parts were unavailable they could not combine good parts from both pumps to get one with serviceable Componets. I’ve got one apart, it’s pretty simple. Looks like scuffing on bronze shaft bearing and shaft surface. So I’m.going to attempt to send to another shop. I have functioning pumps on my aircraft however rear is slow to develop pressure on engine and with drill. Front works well. Looks like clearance on gears may be issue.