Packard Forum Index » V-8 (1955-56)

Re: '55 400
My accelerator pump isn't really working. The plunger itself is fine but I suspect there is supposed to be a check ball and there does not appear to be one. Someone may have lost it in the past. Anyone have an exploded view of the carb or can fill me in on where I may obtain the right size check ball if I'm correct.

Here you go:chicagocarburetor.com/pdf/Instructions-Rochester_4G_4GC.pdf

Can you send a photo of the ball you need? I have a few extras (PM me your address), but they used different diameters in different places. From your description I suspect you are missing #58. The other ball is #61.

If the ball is missing, its retainer must be missing too. I haven't worked on this type of carburetor in years but I've never seen one without some sort of retainer!