Electronic Fuel System Repair and Adjustments

Fuel System—General Information

Stanadyne DE10 pumps are static lock-pin timed during installation of the injection pump.

The fuel supply pump is a separate component mounted on upper right-hand side of engine block and is actuated by a pin in block that rides on engine camshaft lobe.

Engines may be equipped with an optional fuel pre-filter/water bowl.

All engines are equipped with a round final fuel filter with water bowl. Hand primer on top of filter element is optional.

All engines use Stanadyne Rate Shaping Nozzles (RSN).

Field-installed options include fuel heater, water bowl and hand fuel primer.

Relieve Fuel System Pressure

CAUTION: Escaping diesel fuel under pressure can have sufficient force to penetrate the skin, causing serious injury. Before disconnecting lines, be sure to relieve pressure. Before applying pressure to the system, be sure ALL connections are tight and lines, pipes and hoses are not damaged. Keep hands and body away from pinholes and nozzles which eject fluid under pressure. Use a piece of cardboard or wood, rather than hands, to search for suspected leaks.

If ANY fluid is injected into the skin, it must be surgically removed within a few hours by a doctor familiar with this type injury or gangrene may result. Doctors unfamiliar with this type of injury may call the Deere & Company Medical Department in Moline, Illinois, or other knowledgeable medical source.

Any time the fuel system has been opened up for service (lines disconnected or filters removed), it will be necessary to bleed air from the system. See BLEED THE FUEL SYSTEM in this group.

Remove and Install Final Fuel Filter/Water Bowl and/or Pre-Filter/Water Bowl Base

Refer to operator’s manual for proper servicing and (hourly) replacement intervals.

Engines are equipped with a final fuel filter/water bowl (A) and may have an optional pre-filter/water bowl.

Final fuel filters/water bowls can be equipped with a transparent (see-through) water collection bowl and/or hand primer on machines equipped with only one filter.