OMN300069: 9970 Cotton PickerP.I.N. N09970X012001—, Block File: AG_OUO1011_1198_19

Bleeding Fuel System

causym CAUTION: Escaping fluid under pressure can penetrate the skin causing serious injury. Avoid the hazard by relieving pressure before disconnecting hydraulic or other lines. Tighten all connections before applying pressure. Search for leaks with a piece of cardboard. Protect hands and body from high pressure fluids.

If an accident occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed within a few hours or gangrene may result. Doctors unfamiliar with this type of injury should reference a knowledgeable medical source. Such information is available from Deere & Company Medical Department in Moline, Illinois, U.S.A.

Whenever the fuel system has been opened up for service (lines disconnected or filters removed), bleed air from the system.

AG,OUO1011,1198 -19-09SEP99-1/4

1. Remove cover (A).

2. Pour fuel into primary fuel element (B) until fuel is level with top.

3. Replace cover on fuel filter element and tighten, making sure that cover and element seal properly. Failure of a proper seal can result in fuel leakage from element.

A-Cover
B-Primary Fuel Element

AG,OUO1011,1198 -19-09SEP99-2/4

IMPORTANT: Key switch must be in ON position before bleeding fuel system or proper bleeding of the fuel system will not occur.

4. Turn key switch to ON position.

5. Loosen filter bleed plug (A) on fuel filter base.

A-Filter Bleed Plug

AG,OUO1011,1198 -19-09SEP99-3/4

6. Pull out hand primer (A) on fuel supply pump.

7. Operate the hand primer until slight back-pressure is felt and a smooth flow of fuel, free of bubbles, comes out of the filter plug hole.

8. Simultaneously stroke the hand primer down and close the port plug. This prevents air from entering the system. Tighten plug securely. DO NOT overtighten.

9. Start engine.

IMPORTANT: To prevent damage to injector or engine, DO NOT attempt to remove and disassemble injectors yourself. Special training and tools are required. See your John Deere dealer.

10. If engine will not start or misses after bleeding filters, loosen high pressure fuel pipe on three or more injectors.

11. Remove 3-amp fuse from fuel shut-off position in cab mounted fuse block. Turn engine with starter until fuel flows without foam from loose connections.

12. Tighten connections using two wrenches.

13. Bleed remaining injectors similarly.

14. Return fuel shutoff fuse to original position.

A-Hand Primer

AG,OUO1011,1198 -19-09SEP99-4/4