By Ken Daugherty
I am illustrating a tool to set the A/B fuel pump diaphragm in the neutral position and tool to set the diaphragm and to remove the little clip from the C/912 fuel pump.
'A-B spacer block' shows the small wooden block that depresses the pump lever. The block is approx. 1/4" x 3/4" x 1 1/4".
'A-B pump tool' shows the block, 2, 30mm bolts and huts and a standard fuel pump block off plate.
'A-B' tool' shows the pump diaphragm in the neutral position, ready for final assy of the cover. (the diaphragm is this picture is a used one for illustration purposes only)
'C-912 pump tool' the component parts. A piece of sheet metal, ~16 ga., 1" x 5 1/2", A piece of conduit, ~7/8" x 1 3/8" long and 4 bolts, 2, 45mm and 2, 75mm' and 2 hex nuts.
'C-912 clip tool' This holds the diaphragm in placed so the clip spring can be compressed and the clip removed.
'C-912 diaphragm set tool' To set the diaphragm in the neutral position so the top cover can be properly fitted.
'Tool held in vice' This is why there is a bend in the metal.
One final picture to illustrate what happens when the diaphragm in not properly centered. Note the wrinkle in the diaphragm, causing premature failure.