TM 9-2320-209-20-3-1 (b) Pipe plug CAUTION Fittings are made of soft brass. They can be stripped very easily if overtightened. Tighten fittings only enough to stop fuel leaking. NOTE Pipe plug in fuel return elbow of fuel tank on trucks with LD-465 engine is used for this typical procedure, 1. Using 3/16-inch allen wrench, screw in and tighten plug (l). NOTE Follow -on Maintenance Action Required: 1. Start engine. Refer to TM 9-2320-209-10. 2. Check that fuel lines and fittings have no leaks. 3. Stop engine. Refer to TM 9-2320-209-10. END OF TASK 4-24