-----------------
Lu Zuckerman
For more information on this ongoing problem check this out.
-----------------
Thanks for the pdf's.
I looked through and found drawings of typical pumps in e.g. 60-723-28-5Rev1.pdf (relating to cavitation problems) and an exploded view of the motor and pump in 60-721-28-3R1.pdf. (relating to wear of thrust bearings).
The latter was issued in 1999 and noted “…. bearing wear, in turn, may cause excessive rotor shaft end play, loss of pump performance, and internal damage to pump components. Approximately 20 pumps have been returned to Hydro-Aire with premature thrust bearing wear and damaged pump.“.
Presumably that has all been taken care of by now.
There is, of course, nothing yet covering the current problem, though superficially the current problem seems to have some aspects in common with the 1999 problem, e.g. friction between parts and internal damage.
X-rays showing where the wiring within the pump should be positioned are in motor-28-01.pdf.
