Check Fuel Flow and Fuel Shut-off Valve

What happens here

The creator starts by checking the tractor's fuel system components. He inspects the fuel injection pump, fuel filter, fuel water separator, and air filter. He suspects that the fuel cap was left off at some point, leading to water entering the fuel tank and causing rust and contamination. To check for fuel flow, he disconnects a plastic fuel line from the fuel shut-off valve. When no fuel flows out, he decides to remove the fuel shut-off valve, which he refers to as a 'bung,' from the bottom of the fuel tank to address the blockage.

Goal: Verify fuel supply to the injection pump and identify blockages.