'42 fuel pump rebuild help

[Jeff Hansen]

All,

I'm in the middle of rebuilding a fuel pump for my '42 as a spare.  The pump was a flea market find.

I took this pump apart a month ago and am now putting it back together.  In spite of my notes, I am having issues reassembling.  When I assembled the fuel portion of the pump, the internal spring against the diaphragm  is exerting so much pressure that I am unable to budge the diaphragm assembly from the vacuum portion of the pump by pushing upward.  I have been through my notes thinking I did not reassemble the arm assembly properly, but am fairly certain I did.  I thought I'd taken good enough notes, but obviously not!

Does anyone have a good pump schematic?  Or can someone spot my error from my description?

All advice appreciated!
Jeff

[David King (kz78hy)]

Jeff

In case you did not buy your kit here.

http://www.maritimedragracing.com/antique_auto_parts_cellar.htm

The examples shown might be enough to get you by.

I hope this helps.

David

[Otto Skorzeny]

If it's a Rochester, go to the List and look for New Age Metal. It has free online manuals for every Rochester ever made.

[35-709]

   Speed reading again Forrest?

Geoff N.

[Otto Skorzeny]

Oh right. Gotta watch out for those Rochester Fuel Pumps. They're tricky to rebuild!

In my defense, I was really tired after work yesterday.