Service as Required Bleed Using Electronic Transfer Pump The bleed is automatically performed by a small orifice (A) inside the final fuel filter base connected to the overflow valve on injection pump. The system allows air to escape continually through the fuel return line (B) when ignition is ON. RG11719A –UN–20JUN01 1. Ignition ON. 2. Allow 40 seconds for electronic transfer pump to complete priming. Bleed Fuel System 3. If additional system bleeding is required, bleed the circuit by loosening fuel line connections at injection nozzles. See the next procedure, BLEED FUEL SYSTEM AT FUEL INJECTION NOZZLES.
A—Bleed Orifice in Final Fuel Filter Base B—Fuel Return Line OUOD002,000016A –19–25FEB03–2/3 Bleed Fuel System at Fuel Injection Nozzles IMPORTANT: Always use a backup wrench when loosening or tightening fuel lines at nozzles and/or injection pump to avoid damage. RG7725 –UN–08JAN97 1. Using two open-end wrenches, loosen two fuel line connections at injection nozzles. 2. Crank engine over with starter motor for 15 seconds (but do not start engine) until fuel free from bubbles flows out of loosened connection. Retighten connection to specifications.
Bleed At Fuel Injection Nozzles Specification Fuel Injection Nozzle Delivery Line—Torque 27 (20 lb-ft) ................................................................... 3. Repeat procedure for remaining injection nozzles (if necessary) until all air has been removed from fuel system. OUOD002,000016A –19–25FEB03–3/3 40-13 021604 PN=186