The fuel tanks on the 74 series tractors have problems with debris collecting in the bottom of the fuel tank. A quick check is to remove the input fuel line from the tank to the first fuel filter at the front right of the engine and let it flow into a clean bucket. If the fuel does not flow the full of the fuel line then the outlet in the bottom of the tank is clogged. Quick fix is to take an air gun and blow that fuel line back into tank. Permanent fix is to drain the fuel tank and take both outlets out of the bottom of the fuel tank and clean the debris out. To bleed the system: 1) Each fuel filter(s) has a bleed screw on top of it. Loosen the screw on the top of the closest fuel filter to the fuel tank and let fuel flow until there are no more air bubbles, close this screw and repeat for next fuel filter. 2) There are no bleed screws on injection pump but loosen one of the injector lines at rear of injector pump, put STOP/START/RUN lever in Start position, pull throttle 3/4 open and then attempt to start the engine. Do Not run starter for more than 60 seconds at a time and let starter cool and try again. If engine fails to start, try pressurizing the fuel tank with air gun while cranking starter.
PS my brother's 684 had the remains of a lady bug in the fuel tank that caused similar problems.
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Today's Featured Article - Fabrication (Who Me? Make it myself?) - by Chris Pratt. First of all, what are the reasons for not fabricatin your own parts? Most judgements on what should be purchased rather than fabricated stem from: Originality - If the tractor restoration is to be 100% original, it is likely that you should spend the time and money to locate the component in the used or New-old-stock market. Since this can be extremely difficult, you may want to fabricate the item or purchase a modern replacement temporarily, but eventually, you s
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