I like this solution! I too have had
trouble with that finicky keyway on the oil pump…..
Marc Wiese
-----Original Message-----
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Ken Welter
Sent: Friday, January 07, 2005
4:36 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Oil Pump
Drive Key was Re: [FlyRotary] Re: Some things to check
Yes I put a center punch mark on each side of the key to make it a jam fit and
I put locktite on it and hammer it in and then let it sit for a while before
installing it, works great as I have disassembled the engine and reassembled it
several times and the key never budges.
Wendell,
Ed Anderson had a problem where the
oil pump Wooodruff key wasn't in the keyway. The drive was just taken by
the friction of the tensioned nut. Worked for a while. Sooner or
later, the sprocket will slip on the shoulder of the pump shaft.
The symptom is intermittent loss of oil pressure, which gets worse as the
sprocket wears on the shaft shoulder.
So, as I said in the post
below, always make sure that the key is actually in the keyway before
fitting to nut & lockwasher. The key itself is very tiny, and
it requires a bit of juggling to get it in the keyway in the sprocket. I
normally gently stake the keyway in the shaft so that the key can't slip out.
Hope this makes sense!
Leon