- Engine:
- 3412 (S/N: 60M1-UP)
- Industrial Engine:
- 3412D (S/N: REA1-UP)
- 3412C (S/N: 60M1-UP; RLR1-UP; 9BR1-UP)
The new procedure is used for the 7W-0128 Fuel Injection Lines Gp on the serial numbers listed above. Refer to Table 1 for a list of the fuel injection line part numbers that utilize this procedure.
Refer to the procedure below for securing the fuel injection lines within the 7W-0128 Fuel Injection Lines Gp.
| Fuel lines in 7W-0128 Fuel Injection Lines Gp |
| 1W-6451 |
| 1W-6453 |
| 1W-6455 |
| 1W-6457 |
| 1W-6459 |
| 1W-6461 |
| 1W-6452 |
| 1W-6454 |
| 1W-6456 |
| 1W-6458 |
| 1W-6460 |
| 1W-6462 |
Procedure
Safety Section
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Fuel leaked or spilled onto hot surfaces or electrical components can cause a fire. To help prevent possible injury, turn the start switch off when changing fuel filters or water separator elements. Clean up fuel spills immediately. |
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| NOTICE |
|---|
Use a suitable container to catch any fuel that might spill. Clean up any spilled fuel immediately. |
| NOTICE |
|---|
Do not allow dirt to enter the fuel system. Thoroughly clean the area around a fuel system component that will be disconnected. Fit a suitable cover over disconnected fuel system component. |
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| Illustration 1 | g03020696 |
(1) Apply Loctite to treads | |
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| Illustration 2 | g03020716 |
(2 ) Witness mark | |
- If a fuel leak is indicated due to loose fuel line nuts, loosen the large and small nut on the affected fuel line.
- Clean the threads
- Apply Loctite® 242® Threadlocker #24221 to the threads (1) on the 1W-6777 Injection Line Adapter and on the small nut threads.
- Torque the nuts to 40 ± 7 N·m (30 ± 5 lb ft) starting with the large nut first then tightening the small nut.
- Perform an operational and leak check of the fuel lines.
- If no leak is present, apply witness marks (2) across the entire joint from the 1W-6777 Injection Line Adapter, including both fuel line nuts, and the fuel line. The witness mark will help to identify a future potential leak from the nuts loosening. Refer to Illustrations 1 and 2.