'32 VL Hand oil pump operation

[knucklehead 61]

They are leather cups, not rubber. once installed, there is a cotter pin that keeps the screw from coming loose at the bottom. Sean at Competition Distribution has them available.
Also: do not use teflon tape on any of the oil lines. you can use teflon paste, but ez-turn is a far superior product for sealing the threads, flair fittings, petcocks, & intake manifolds.

[loch]

Thanks, Knucklehead!

Good information!

I didn't know about the cotter pin, makes sense. I pulled mine apart and there was a thin piece of wire through the hole. It's probably a bad attempt at lock-wiring the screw in place.

[loch]

I got the oil pump leathers this week. Going to install them tomorrow. I'm guessing I should lubricate them with a bit of engine oil before installing?

Speaking of engine oil - what weight of modern engine oil should I use in this old machine. I'm guessing a single weight, maybe 50 or lighter since it's cold now? Below 50F most days.

[montij]

Resurrecting an old thread. Received the leather cup washers from harbour vintage today. Had an unreasonably difficult time installing my hand pump Back into the tank of my 31 VL. The old leathers I removed were much smaller than these and the new leathers required a tremendous force to get fitted. I did oil them ahead of time. They seem to get stuck when the hand pump is pushed all the way down and I have to unthread the pump and Rock it while pulling up very hard to remove the hand pump again.

There may be a trick to this that I’m not aware of. Alternatively these new leathers are just too large.

[loch]

Montij, I don't recall how difficult is was to install my pump shaft when I first replaced the leathers. I've only done it once, when rebuilding the Sergeant (1932 VL). The pump still offers plenty of resistance when operating. I do recall that the first dozen times operating it I had difficulty with raising the shaft. But I'm not sure if it was just inexperience with the locking notch or because of the new leather or both. You might think about carefully using the pump to see if the leather softens over time. Or wait for someone more experienced to respond, before trimming them.

Regards,
Loch