The Stovebolt Site Forums The Shop Area Engine Shop 52 3100 not getting fuel

One of your own pics may provide some answers (attached below).

The in cab tank has a fitting and shut off valve threaded into the bottom of the tank upwards through the cab floor on passenger side.

The rubber hose attached to that brass shutoff valve should lead forward towards the engine and fuel pump. One of your other pictures showed that rubber line disconnected from the in line fuel filter before it gets to the fuel pump.

The fuel sending unit as others have noted is a later than '52 unit which changed where the fuel was drawn from the tank. Apparently a PO (Previous Owner) used what they had or what was available as a sending unit and just capped of the unused fuel line coming out the unit top. As long as it's sealed up and leak free, nothing wrong with leaving it alone for the time being.

The upper fuel inlet and vent set up connected to the top of your in-cab tank is correct for the '52. Best to check the condition of the rubber and make sure clamps are tight as problems here lead to gas fumes and vapors in the cab - a bad situation all around.

At this point, the behind the cab tank and what looks like an adaption of an electric fuel transfer pump doesn't play well with the in-cab tank and unless you wish to relocate the tank to outside of the cab, could/should be removed. More info on what to do with that equipment can be discussed later. Suggest you hang onto everything for now until you figure out what your plan is.

Last comment before I let others chime in here. The inside of your tank doesn't look that bad, but doesn't look great either. New reproduction tanks that are rust free are considered the best starting point to bring your fuel system up to par and keep your engine from suffering problems from old fuel residue and rust.