Engine Systems DETROIT DIESEL moving parts of the injector to bind. Tighten the rocker shaft bolts to 90-100 lb-ft (122-136 Nm) torque. Align the fuel pipes and connect them to the injector and the fuel connectors. Use socket J 8932-01 and a torque wrench to tighten the fuel pipe nuts to 12-15 lb- ft (16-20 Nm) torque. NOTE: Do not bend the fuel pipes and do not exceed the specified torque. Excessive tightening will twist or fracture the flared ends of the fuel pipes and result in leaks. Lubricating oil diluted by fuel oil can cause serious damage to the engine bearings.
Time the injector, position the injector rack control lever and adjust the exhaust valve clearance (cold setting) as outlined in the engine tune-up procedure. If all of the injectors have been replaced, perform a complete tune-up on the engine. Fig. 2 - Removing Injector from Cylinder Head remove the starting motor or the pipe plug in the flywheel housing and use a pry bar against the teeth of the flywheel ring gear to turn the crankshaft. Fuel Bump A positive displacement gear type fuel pump is attached to the blower and driven off the front end of the blower. 5. Remove the two rocker shaft bracket bolts and swing the rocker arm assembly away from the injector and valves.
A spring-loaded relief valve, incorporated in the pump body, normally remains in the closed position, operating only when the pressure on the outlet side (to the fuel filter) becomes excessive due to a plugged filter or fuel line. 6. Remove the injector clamp bolt, washer and clamp. 7. Loosen the inner and outer adjusting screws on the injector rack control lever and slide the lever away from the injector. 8. Free the injector from its seat as shown in Fig. 2 and lift it from the cylinder head. 9. Cover rhe injector hole in the cylinder head to keep foreign particles out of the cylinder.
install Injector Before installing an injector, be sure the beveled seat of the injector tube is free from dirt particles and carbon deposits. A new or reconditioned injector may be installed by reversing the sequence of operations given for removal. Be sure the fuel injector is filled with fuel oil. If necessary, add clean fuel oil at the inlet filter until it runs out the outlet filter. Do not tighten the injector clamp bolt to more than 20-25 lb-ft (27-34 Nm) torque, as this may cause the Fig. 3 - Typical Fuel Filter Mounting Page 14