Description
When your injectors start weeping diesel or you notice the smell of fuel around the engine, there’s a good chance one of these small banjo bolts has loosened up or the seal has given out. This 5/16″ UNF banjo bolt is the threaded fitting that connects your leak-off line to each fuel injector, returning unused diesel back to the tank where it belongs instead of dripping onto hot engine components.
What You’re Getting
- Precision-threaded 5/16″ UNF x 9/16″ banjo bolt for secure injector connections
- Designed specifically for leak-off fuel systems in Perkins diesel engines
- Direct replacement that stops fuel leaks and maintains proper system pressure
- Quality construction that handles the constant fuel flow and engine vibration
Built for Diesel Workhorses
This banjo bolt fits a wide range of Massey Ferguson tractors powered by the reliable Perkins diesel engines – from the smaller 135 and 148 models up through the 550 series. These are the tractors you’ll find doing everything from hay work and cultivation to loader duties around the farm. The leak-off system is critical for keeping these engines running smoothly by returning excess fuel from each injector back to the tank.
Made to Last
Fuel system components need to handle constant diesel exposure and the vibration that comes with hard-working tractors. This bolt is engineered to maintain a tight seal while allowing proper fuel flow through the leak-off circuit. The 5/16″ UNF threading ensures a secure connection that won’t back out from engine vibration.
Installation Notes
Always work on a cold engine when replacing fuel system parts, and have a fire extinguisher handy. Clean the connection thoroughly before installing the new bolt – any debris can prevent proper sealing. Don’t over-tighten these fittings; snug is sufficient for the low-pressure leak-off circuit.
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