AC fuel pump advice

[Ganmain Tony]

Hi Ron

Would you mind providing further details on the new diaphragm please?

[Richard Farrant]

Originally Posted by Ganmain Tony

Hi Ron

Would you mind providing further details on the new diaphragm please?

Hi Tony,
Not sure if you are aware but British AC pumps have different diaphragms, the spindle on British ones has two notches on the spindle and you twist them to lock in to the arm, the American ones have a slot in the end and you hook them into the arm. If you have one with a slot in, I recommend those made by MV Spares (Darcy Miller) in Sydney. Very good quality, they are for jeeps but fit other vehicles.

regards, Richard

[Ron Pier]

Yes mine is the British version. Bought from Belcher Engineering. Ron

[Ganmain Tony]

Much appreciated Richard very helpful.

Thank you also Ron. Hope that sorts out the carrier.

[Lynn Eades]

I didn't know they were British verses American, but there are also different lengths to the rods/shafts of the diaphragms.

[gjamo]

On old Holden fuel pumps you had to push the arm up all the way to compress the spring before finally tightening th body screws. This makes sure the diaphram is fully stretched,

[Lynn Eades]

Graeme, this applies to all the A.C. mechanical pumps. It leaves enough material inside the housing to be able to work up and down. If the screws are tightened with the diaphragm in the neutral position the diaphragm will be tight like a drum skin and not able to deliver a required volume of fuel.