John Deere 4045 and 6068 OEM Diesel Engines — Bleed the Fuel System (4045DF270, 4045TF270)

Service as Required At Fuel Injection Pump 1. Slightly loosen fuel return line connector (A) at fuel injection pump. 2. Operate fuel supply pump primer lever until fuel, without air bubbles, flows from fuel return line connection. RG6264 –UN–03NOV97 3. Tighten return line connector to 27 (20 lb-ft). 4. Primer lever is spring-loaded and will return to normal position. Stanadyne Rotary Fuel Injection Pump A—Fuel Return Line Connector OURGP12,00001E9 –19–05MAR03–4/5 At Fuel Injection Nozzles 1. Move the engine speed control lever to half throttle position. On engines equipped with electronic fuel shut-off solenoid, energize solenoid. 2.

Using two open-end wrenches, loosen fuel line connection at injection nozzle as shown. RG7725 –UN–08JAN97 3. Crank engine over with starter motor, (but do not start engine), until fuel free from bubbles flows out of loosened connection. Fuel Line Connection 4. Retighten connection to 27 (20 lb-ft). 5. Repeat procedure for remaining injection nozzles (if necessary) until all air has been removed from fuel system. If engine still will not start, see your authorized servicing dealer or engine distributor. OURGP12,00001E9 –19–05MAR03–5/5 40-21 021604 PN=194