i need some more education please

just took delivery of a new fuel pump. could not resist and stripped it out,took 2 days to find where one of the screws went!! question.... what is the function of the pulsator?? the pictures i have seen show a can and a disc with a series of holes. this one has a small cube of rubber, i nearly threw it away.

thanks in advance

stuey

UK  

it was brand new but i needed to "clock" the IL/OL ports and it was only 2 more screws to remove the lower bowl that contained the valves. thats where i found this rubber cube. i initially thought someone had left a piece of packing in there. but i suspect it is a cheaper way of providing a "pulsator"

what is the pulsator in the pump for and how does it work?

i was also surprised how much effort it took to operate the pump

stuey  

seems its to smooth out the pumps pulses.  most info came from forums discussing EFI in tank pumps.these setups use a piece of flexiblehose on the out put of the pump which also isolates pump noise.

Summit has a repair kit for a similar Holley pump and,  lo and behold, there is that little rubber cube.

one piece of info that came to light that may be of use to those who like to do your own rebuilds (diaphragm replacement)is that when replacing the bowl with the 6  10-32 screws the operating arm of the pump must be in the fully operated position, which is a bit of a struggle. by the way the pump is a FE Carter .     hope this may help someone

stuey