Oil Pump Rotation

[lakeview]

Won't Spin by Hand?
Bought a nice dormant project from a busy man a couple hours away, he had stopped working on it several years ago and you know.
I need to top off the motor and checking the side cover, the oil pump cannot be turned by my fingers, only with a wrench. Should it rotate with my fingers, or does it normally take a bit more effort. Plus, clockwise or counterclockwise?
And yes, it's a lovely matching numbers, original paint 26123 km example, but the three major locks all need different keys, so it may have a bit of a checkered history.

 

[jetmechmarty]

I believe it turns in the opposite direction of the crankshaft and I believe it should easily turn by hand.

 

[lakeview]

Actual Bits it Came With
I have a bit of clean up to do. Side case that it came with had to have the tach drive rod tapped out of it with a brass drift and the 3 pump retaining screws are seized tight so far.
My spare off the shelf may be used and it is the subject of the rotation question.

 

[Jim]

Normal rotation will be clockwise looking at it... although that won't matter for testing. It should spin freely by hand in either direction. If you need a wrench, odds are one of the internal gears has cracked.

 

[RC4MAN]

I would think it should turn freely. I would remove the tach drive and see if that has it in a bind.

 

[Its been a long time]

Normal rotation will be clockwise looking at it... although that won't matter for testing. It should spin freely by hand in either direction. If you need a wrench, odds are one of the internal gears has cracked.

99% for certain, I would say.

 

[lakeview]

Fixed!
Big gear on top of the pump had been installed upside-down and was binding on pump body.
Thanks for the help, all.

 

[jetmechmarty]

View attachment 324073
Fixed!
Gear on top of the pump had been installed upside-down and was binding on pump body.
Thanks for the help, all.

Aha! You tried to trick us by hiding that under your wrench.

 

[Jim]

Gear on top of the pump had been installed upside-down and was binding on pump body.

Noted for future reference.