- The fuel tank is empty or the tank has been partially drained.
- The low pressure fuel lines are disconnected.
- A leak exists in the low pressure fuel system.
- The fuel filter is replaced.
- The fuel injection pump is replaced.
Use the following procedure in order to remove air from the fuel system:
- Loosen the banjo bolt (1) on the secondary fuel filter base (2) .
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| Illustration 1 | g01241414 |
Typical example | |
- Operate the priming lever on the priming pump until fuel flows out of the banjo bolt (1) .
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| Illustration 2 | g00898194 |
Hand priming lever for the priming pump | |
Note: If the drive cam of the fuel priming pump is in the position of maximum cam lift, the priming lever will not operate. Rotate the crankshaft by hand one revolution.
- Tighten the banjo bolt (1) to a torque of 23 N·m (17 lb ft).
- If the fuel line for the air inlet heater has been drained, loosen nut (3) . Operate the priming lever on the fuel priming pump until fuel is free of air from the fuel line.
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| Illustration 3 | g00905440 |
Air inlet heater on the air inlet manifold (3) Flare nut | |
- Tighten nut (3) to a torque of 22 N·m (16 lb ft).
- Loosen flare nuts (4) for the high pressure fuel lines on two fuel injection nozzles.
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| Illustration 4 | g00898197 |
Fuel injection nozzles in the cylinder head (4) Flare nut | |
Note: Damage to the fuel injection pump, to the battery, and to the starting motor can occur if the starting motor is used excessively to purge the air from the fuel system.
- Operate the starting motor until fuel is flowing from the fuel lines.
- Tighten flare nuts (4) to a torque of 22 N·m (16 lb ft).
- The engine is now ready to start. Operate the engine at low idle for a minimum of five minutes immediately after air has been removed from the fuel system.
Note: Running the engine for this period of time will help ensure that the pump is completely free of air. Damage to the internal parts of the pump, which is caused by metal to metal contact, will be prevented. If the engine stops or if the engine runs roughly, check for air in the fuel system. If air is in the fuel system, leakage in the low pressure fuel system probably exists.
| 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. |