SEBU7899-05 87 Maintenance Section Fuel System - Prime The Engine Has Been Run Out of Fuel NOTICE Use a suitable container to catch any fuel that might spill. Clean up any spilled fuel immediately. NOTICE Do not allow dirt to enter the fuel system. Thoroughly clean the area around a fuel system component that will be disconnected. Fit a suitable cover over discon- nected fuel system component. g00975199 Illustration 50 (1) Fuel priming pump (2) Air purge screw (3) Priming valve (If Equipped) 1. Turn the ignition switch to the “OFF” position. 2. Fill the fuel tank(s) with clean diesel fuel. 2.
Turn the priming valve (3) (If Equipped) to the “Closed (Prime)” position in order to prime the fuel system. 3. Open air purge screw (2) for the fuel filter by three full turns. Do not remove the air purge screw. NOTICE Do not crank the engine continuously for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking the engine again. 4. Start the engine. The engine should start and the engine should run smoothly. g00975199 Illustration 51 (1) Fuel priming pump (2) Air purge screw (3) Priming valve (If Equipped) Note: You may use the fuel priming pump for the fuel filter (IF EQUIPPED) instead of starting the engine and running the engine. 3.
Turn the priming valve (3) (If Equipped) to the “Closed (Prime)” position in order to prime the fuel system. 5. While the engine is running, observe air purge screw (2). When a small drop of fuel appears at the threads of the air purge screw, close and tighten air purge screw (2). 4. Open air purge screw (2) for the fuel filter by three full turns. Do not remove the air purge screw. Note: There may be a noticeable change in the sound of the running engine when the air purge screw is tightened. The change in the sound of the engine is normal. NOTICE Do not crank the engine continuously for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking the engine again.
Note: Failure to tighten all fittings could result in serious fuel leaks. 6. Clean any residual fuel from the engine components. 5. Crank the engine for 30 seconds. Use a suitable container to catch the fuel while you crank the engine. Allow the starter motor to cool for 2 minutes. 7. After the engine has operated smoothly for 30 seconds, turn the priming valve (3) to the “Open (Run)” position. Note: You may use the fuel priming pump (1) (IF EQUIPPED) for the fuel filter instead of cranking the engine. Note: Shortened injector life may occur if the priming valve (3) is left in the “Closed (Prime)” position. 6. Crank the engine for 30 seconds. Allow the starter motor to cool for 2 minutes.