2.
The joy was short-lived
because it was only a one minute run while I had the redrive drain line
disconnected. Taking the drain line off gave the first clue. No
sign that a drop of oil had ever been there. The amount of oil in the
container after the run – zippo; not a drop. I took off the feed line
and there was oil sitting in the fitting. Feeding to a container, I
ran again for less than 30 seconds, and sent more than a pint into the
container. Complete blockage inside the drive. The prospect of
removing the prop, drive and disassembly is not a happy one.
Al,
something you might try before taking the gearbox off (a pain to say the
least). Its been know for such stuff as the silicon grey sealant to
plug up the drains. Yes, unlikely that it would have plugged up the
front one. But, short of taking off the gear box you might try
removing the drain fittings - just in the remote chance they could be
plugged.
Ed
With two exits and 100 psi oil; my
guess is it’s highly unlikely that the explanation is ‘foreign
matter’. I think there is no oil going into the drive. It
appears to me from the diagram that the oil goes in through a bushing via a
hole and/or groove. Most likely a misalignment there giving the oil
nowhere to go. I’ll check further later today.
Al
Hi, Al.....do you
have a small restrictor in your feed line, something like .030 or .040
thousandths? If so, is it possible that might be
obstructed? A simple test would be to disconnect the feed line,
turn the engine over and see if in fact oil is even trying to get into the
PRSU. You've probably already thought of this, but just in
case..... take care and good luck on the troubleshooting.
Paul Conner