C4.4 Industrial Engine Air in Fuel

Air in Fuel - Test

C4.4 Industrial Engine [KENR9119]

C4.4 Industrial Engine Compression - Test

FUEL SYSTEM

C4.4 Industrial Engine Air in Fuel - Test

C4.4 Industrial Engine Cleanliness of Fuel System Components

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	301-1501	Sight gauge	1

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NOTICE

Ensure that all adjustments and repairs that are carried out to the fuel system are performed by authorized personnel that have the correct training. Before beginning ANY work on the fuel system, refer to Operation and Maintenance Manual, "General Hazard Information and High Pressure Fuel Lines" for safety information. Refer to Systems Operation, Testing and Adjusting, "Cleanliness of Fuel System Components" for detailed information on the standards of cleanliness that must be observed during ALL work on the fuel system.

Note: Ensure that the tools are stored with the caps in place. Store the tools in a clean plastic bag.

Ensure that the fuel level in the fuel tank is above the level of the suction pipe in the fuel tank.
Inspect the fuel system thoroughly for leaks. If necessary, repair the fuel system.
Check all low-pressure fuel lines from the fuel tank for restrictions. Replace any damaged components.
Prime the fuel system. Refer to Operation and Maintenance Manual, "Fuel System - Prime" for the correct procedure. If the electric fuel transfer pump is not operating, refer to Troubleshooting, "Fuel Pump Relay Circuit - Test".
Start the engine. Refer to Operation and Maintenance Manual, "Starting the Engine" for the correct procedure. Check if the problem has been resolved. Run the engine at low idle speed for 5 minutes.
Stop the engine. Refer to Operation and Maintenance Manual, "Stopping the Engine" for the correct procedure.
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Illustration 1 g02305093

Typical example
If necessary, remove the low-pressure fuel line from the retaining clips. Remove the low-pressure fuel line from the inlet connection (1) of the secondary fuel filter base.
Note: Ensure that the low-pressure fuel lines are not deformed.
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Illustration 2 g02352952
Connect Tooling (A) to the low-pressure fuel line and the secondary fuel filter base. Connect the open end of the tube to the inlet connection (1) of the secondary fuel filter base. Ensure that Tooling (A) is secured and clear of rotating parts.
Prime the fuel system. Refer to Operation and Maintenance Manual, "Fuel System - Prime" for the correct procedure.
Start the engine. Refer to Operation and Maintenance Manual, "Starting the Engine" for the correct procedure. Refer to steps 10.a to 10.d for the procedure for testing the air in fuel.
1. Run the engine a low idle speed.
2. Run the engine for 2 minutes. There should be no air in the fuel flow through the sight tube. Small bubbles that are spaced more than 2.5 cm (1.0 inch) are acceptable. Do not manipulate the connections during the test for the air in fuel.
3. The presence of large bubbles or a continuous stream of bubbles indicates a leak.
4. Investigate potential leaks and rectify any potential leaks in the low-pressure fuel system. Check for leaks in the connections of the inline fuel strainer. Check for leaks between the fuel tank and the inlet at the fuel transfer pump. If necessary, replace the low-pressure fuel lines.
Remove Tooling (A). Reconnect the low-pressure lines.
Prime the fuel system. Refer to Operation and Maintenance Manual, "Fuel System - Prime" for the correct procedure.