Fuel tank and fuel pump. Gas engine
1 - Coal adsorber; 2 - Fuel line (disable column on overflow); 3 - Filler neck; 4 - Ventilation tube of the fuel tank; 5 - Fuel delivery module; 6 - Right chamber of the fuel tank; 7 - Submersible fuel pump with a fuel reserve sensor; 8 - Fuel supply line to the engine; 9 - Purge line to the adsorber; 10 - Pressure sensor in the fuel tank; 11 - Fuel tank cap; 12 - Ventilation pipe
Please read the precautions in the previous section before you begin.
Attention! After performing the procedure described below, you will only remove excess pressure from the fuel system. Gasoline will remain in the pipelines. Take all necessary precautions before disconnecting any fuel hose.
1. The fuel system considered in this Chapter consists of a fuel tank, a fuel pump with a fuel reserve sensor located inside it, a fuel filter, injectors, a pressure regulator and various hoses and tubes. Inside all these nodes during engine operation (as well as with the ignition on) fuel is under pressure.
2. After turning off the ignition, the pressure in the system remains for quite a long time. Before disconnecting any of the components mentioned above, the pressure must be reduced.
3. Remove the fuel tank cap and screw it back on.
4. The simplest way to relieve pressure is as follows. Remove the fuel pump fuse and start the engine. If the engine does not start, crank it with the starter for a few seconds, and if it starts, let the engine idle until it stalls on its own. In order to completely relieve pressure, turn the crankshaft of the engine with a starter for a couple of turns. Turn off the ignition and replace the pump fuse.
5. At the service station, the fuel pressure is removed on the fuel distribution line, while acting as follows:
6. Engine 271: Remove the engine top cover.
7. Unscrew the cover (1).
8. Screw an auxiliary hose with valve, e.g. KLANN-KL-0120-54 onto the distributor connection (2).
9. Open the valve and allow some fuel to drain into a container underneath. This will relieve the fuel pressure.
10. Close the valve and screw on the cap.
11. Engine 271: Attach the engine top cover.
12. Be aware that if pressure is released (or fuel has been removed from the system), the engine will take longer than usual to start. You will have to crank the engine with the starter for at least a few seconds, during which time the pressure in the system will be restored and the fuel will fill all the pipelines.