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Wendell,
Nah, the inspection is done during
assembly. If you wasnt to check it on an assembled engine,
basically, the frotn cover has to come off, and the nut and lock
washer removed. That's why it's always smart to double check DURING
assembly!
During assembly, the whole pump is already
bolted on the engine. The oil pump DRIVEN sprocket together with the
crank DRIVE sprocket & chain are slipped on the two shafts. The trick
is not to dislodge the Woodruff key from the keyway on the pump shaft. As
I said below, I normally LIGHTLY stake the keyway in the pump
shaft. Just a GENTLE tap with the blade of a small chisel or
screwdriver is usually enough. Then the key itself can't easily slip.
Trial fit the oil pump sprocket before you attempt it with the chain and the
E-Shaft sprocket.
You need to look down the keyway
of the sprocket to make sure you can see the key and line it up with the keyway
anyway. With a bit of juggling and jiggling, it will
all fall into place. If it's not correctly installed, it
is obvious. The key should be within 4 mm of the end of the
sprocket. I don't know how else to describe it. With the key correctly
installed, I usually then line up the drive sprocket and
counterweight, then fit the square E-Shaft key. Then I fit the oil
pump lock washer & nut, tighten the nut, and fold over the lock washer
tab (MOST important!!)..
Hope this clarifies the situation,
Leon
----- Original Message -----
Sent: Saturday, January 08, 2005 11:22
AM
Subject: [FlyRotary] Re: Oil Pump Drive
Key was Re: [FlyRotary] Re: Some things to check
----- Original Message -----
Sent: Friday, January 07, 2005 2:46
PM
Subject: [FlyRotary] Oil Pump Drive Key
was Re: [FlyRotary] Re: Some things to check
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
Thanks Leon, can proper installation be
checked by inspection or do you have to remove the pump and start
over?
Wendell
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