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Carter Dual Action Fuel Pump Rebuild
Part 5 -
December 4, 2010
The next thing to install is the fuel diaphragm. When assembled in the
pump body, it will look like it is shown below.
Lightly oil the rubber seal and install the diaphragm into the pump. You
will need to push down on the diaphragm until you can slide the pump arm
onto the rod and drive the pivot pin back into place.
Next, install the pump arm return spring. Make sure that it is over the
nubs on the pump body and pump arm.
Next, put the pump body in a vice as shown below and slip an
adjustable wrench over the end of the pump arm. This will give you the
leverage you need to compress the diaphragm spring enough to attach the
pulsator assembly. You will also need to have six of the Philips head screws
with a washer on them ready.
To install the pulsator, turn the diaphragm so the screw holes line up
with the screw holes in the pump (the screw hole pattern in the diaphragm is
slightly larger than on the pump body on purpose), place the pulsator
assembly on top of the diaphragm (make sure to line up the marks you made
earlier) and pull up on the wrench to compress the spring as far as it will
go. Install the screws and tighten them. Some of the screws will take a bit
of wiggling to go in but you'll eventually get them. One tip for you when
doing this is to make sure that each screw is in a few threads before you
allow any tension to be placed on them. If you don't do this, you run the
risk if stripping the threads out of the pump body. Note:
Make very sure that all of the screws go through the holes in the diaphragm.
See how the edge of the diaphragm sort of disappears in the next picture? I
didn't catch that until I started the car. That mistake pumped a bunch of
gas on the garage floor.
Next, install the pivot pin plug. Tap it in until it is seated in the
pump body and then give it a couple of sharp whacks with a pin punch in the
center. This will cause the plug to expand so it doesn't fall out.
Up Next: Assembly continued.
12/05/10 03:35:24 PM