Usage:
3114 And 3116 Industrial, Marine, And Generator Set Engines
- SUPPLEMENT: March 1994
Engine News, December 1993, Page 2, "New Fuel Filter Helps Prevent Hard Starting Due To Injector Wear".
In the "Components Required To Update Earlier Engines" Chart, the third Part Number, "7E-9889", is NOT correct. The correct part is the 7E9898 Connector.
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Description of Change: A new 3-micron fuel filter is available and is currently used in some selected Industrial Engine applications. This new filter removes much smaller dirt particles than the former fuel filter. This helps reduce internal wear of the unit injectors. Worn unit injectors can result in hard starting of a hot engine. The new fuel filter has a different thread size and requires a new filter base. Also, a new fuel pressure relief (fuel bypass) valve is installed to limit fuel transfer pump pressure. The new relief valve directs excess fuel back to the tank.
Adaptable To: The new 3-micron fuel filter and fuel pressure relief valve are adaptable to most 3114 and 3116 Industrial, Marine, and Generator Set Engines, except those which have a remote mounted fuel filter. A remote mounted filter base with the correct thread size for the new filter is not available at this time. The components identified in the chart are required to update earlier engines.
Installation Procedure
1. Remove 7E-6288 or 7W-0032 Tube Assembly (1) from the fuel transfer pump to fuel filter base. Remove the 6V-8724 Elbow (2) in the fuel filter base. Remove the existing fuel filter base and fuel filter.
NOTE: For earlier engines which have 7W-0032 Tube Assembly (1) and 6V-8724 Elbow (2) as shown in Illustration 1, the 6V-8724 Elbow (3) and 7W-7381 Fitting (4) at the governor housing must also be removed, and replaced by a new 7E-9898 Connector (6). Take care not to disturb or damage the small check valve in the governor housing under the connector. Later engines with 7E-6288 Tube Assembly (1) and 7E-9898 Connector (6) as shown in Illustration 2 already have the correct connector in the governor housing.
2. Disconnect the fuel return hose and its elbow (5) temporarily.
3. Install the new 3E-7410 Tee (7) and 5P-1046 Connector (8) at the governor as shown in Illustration 3. Install the 5P-4924 Elbow (5) into the new tee and connect the fuel return hose back to the elbow.
4. Install the new 6I-4802 Filter Base, using the 7C-1159 Gasket. Install 8T-0788 Elbow (9) at the fuel filter. Install the new 6I-2421 Tube Assembly (10), 6V-8774 Tee (11), and 6I-2422 Relief Valve Assembly (12) to 8T-0788 Elbow (9) at the fuel filter. Refer to Illustration 3.
NOTE: The 6I-2422 Relief Valve Assembly must be installed exactly as shown in Illustration 3, with Plug (A) directly opposite Tee (11). It is possible to install the valve incorrectly, with Plug (A) up. In that position, the relief valve is backwards and will not function.
5. Install 5P-1046 connector (13) to relief valve assembly (12) and 5P-1442 Hose (14) to connectors (8) and (13) with 5P-4961 clamps (15) as shown in Illustration 3. Remove existing bolt and mount the bypass hose with 8L-5449 Spacer (16), 4K-8864 Clip (17), 9M-1974 Washer (18), and 6V-5219 Bolt (19) on the cylinder block cover as shown in View B-B. Check hose routing to make sure the new hose will not be rubbed or cut. Tighten bolt (19) to 25 ± 7 N·m (18 ± 5 lb ft).
6. Install new 6I-4783 Filter (20). Paint the new components to help prevent rust.
NOTE: The new filter will filter out much smaller particles than the former filter in order to protect the fuel injectors from possible wear. For that reason, customers should use only the new 6I-4783 Fuel Filter. The former fuel filter will not fit the new filter base.
NOTE: The new fuel filter should be installed DRY and then the fuel system should be primed with the hand priming pump. Do NOT fill the fuel filter with fuel before installing it. This fuel would not be filtered and could be contaminated. Contaminated fuel will cause accelerated wear to the fuel system parts.
NOTE: The recommended fuel filter change interval is 250 hours. More frequent filter changes may be required if the filter becomes plugged with dirt, rust, or other debris. Plugged fuel filters are indicated by low power, poor performance, and/or black exhaust smoke. Fuel filter life is dependent upon fuel quality.
7. Use the hand priming pump to fill the new fuel filter and the fuel lines. Start the engine and check for leaks.
Illustration 1. Location of components on earlier engines with 7W-0032 Tube Assembly.
Illustration 2. Location of components on later engines with 7E-6288 Tube Assembly.
Illustration 3. Location of new components.