Note. The fuel distribution pump is very sensitive to contaminated fuel. The hole in the centrifugal regulator clutch becomes contaminated, wears out, and as a result, engine malfunctions occur. The pump cannot be repaired without a test bench, and this is expensive. Therefore, it is best to regularly change the fuel filter and remove water from it.
The illustration shows a cross-section of the high-pressure fuel pump: 1 - drive shaft; 2 - fuel supply from the filter; 3 - fuel pump safety valve; 4 - manual feed control drive; 5 - centrifugal regulator; 6 - drain hole; 7 - switch; 8 - fuel line to injectors; 9 - distribution piston; 10 - pushing washer; 11 - injection advance regulator (here for better clarity it is rotated by 90 degrees); 12 - roller ring; 13 - fuel vane pump (also rotated 90 degrees)
The illustration shows the fuel lines located around the high pressure fuel pump: 1 - drain pipe leading from the injectors to the pump; 2 - drain line from the fuel pump to the fuel tank; 3 fuel lines to injectors; 4 - drain pipe between two nozzles; 5 - fuel supply line from the filter. Arrows show the direction of fuel flow. |
The hollow bolt of the drain pipe (3) is shown slightly baited into the upper part of the fuel pump. You need to look very carefully to see the thin hole on the side of the bolt. On its upper part is engraved "ONT" so that this bolt is not confused with another Because the hollow bolt of the supply pipeline looks similar, but it has a significantly larger hole diameter. Further, the numbers indicate: 1 - minimum speed adjustment screw; 2 - maximum speed adjustment screw; 4 - electromagnetic feed switch |
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