1937 W Oil Pump Gasket

[Rex]

I have a single check valve oil feed pump on a '37 W that won't produce any pressure. I took the pump off and verified that all the internals were correct and free. Should this pump have the gasket with the slot between the two holes below the rotor, or the one with two separate holes below the rotor?

[DOC HARLEY]

Rex, You need the one with the slot. Doc

[Rex]

Thanks for the reply, Doc. Sorry to hear that, since that's what I have now. Hopefully the new pump will do the trick. For $375 it should shoot oil from here to your house.
I'll keep you up to date on my progress.
Rex