Fuel System: 1950 2R16A fuel pump identification

[Milaca]

I have the fuel pump apart on my fire truck and I find that the diaphragm is crumbling apart.
I look in the Stude-Intl catalog and it mentions both single and dual action fuel pumps for 1950 2R-series trucks.
They mention a four digit "flange" number but I am unable to find any number.
I either want to buy a new pump or a rebuild kit for the one that I have but I don't know what I need. Help me please!

[Dwain G.]

The four digit 'flange' numbers are stamped on the edge of the pump mounting flange. They are usually the last four numbers of the maker's (not Studebaker) part number.

[StudeRich]

The First thing to determine is if your Truck has a Vacuum Windshield Wiper assist setup to a Dual Action Pump for boosting the Wipers. So if it has only ONE Diaphragm, you need not worry about what Number it is.

Also remembering that a 2R16A has a 245 C.I.D. Big Six not a 169 Champion Engine.

[TWChamp]

Just to add some basic help to identify the pumps, the dual diaphram pumps on my cars all have a glass sediment bowl filter next to the top diaphram for the fuel pump. This diaphram is also a bit smaller and held in place by 6 screws. The bottom larger diaphram is the vacuum pump and is held in place by 8 screws. Commanders came standard with the dual diaphram pumps in 1950, but it was an option on my Champions. I don't know what came standard on the trucks with the larger Commander engine.

[TWChamp]

Here's an example of the common dual diaphram fuel pump, although this one is for the Champion, and as Rich said, you need one for the larger Commander engine.

http://www.ebay.com/itm/400485687783?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT#ht_390wt_867

[Milaca]

I looked again and there isn't a number stamped on the mount flange, but it is apparently a single-action pump.
Thank you all for your help.