Replacing check valve for fuel pumps - RA07041045820X (07.4-5820)
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Operation No. of operation texts and operation values or standard texts and flat rates
07-5820
- Replacing check valve at fuel pump 1 (M3m1)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Pay attention to safety instructions!Overpressure in fuel tank reduce by opening pressure cap, closing. Ground cable at battery disconnect, connect. Cover (69) take off, fit on. Fuel suction hose (53) and fuel pressure hose (52) pinch with clamp (51) 000 589 40 37 00, slacken clamp. Cap nut (54a) at fuel pump 1 (M3m1) unscrew, screw on.
Collect remaining fuel.
Tightening torque 26 Nm as reference value.Screws (arrows) at bracket (57) slacken, tighten. Detach fuel pressure hose (52) for this purpose, attach. Check valve (63) remove, install. Collect remaining fuel.
Tightening torque 26 Nm as reference value.
Examine plastic sheet (56); renew if necessary. Always install plastic sheet (56) between fuel pump (M3m1) and bracket (57). The plastic sheets of the fuel pumps (M3m1, M3m2) and of the fuel filter (55) must project on both sides of the bracket. Direct contact of a fuel pump with bracket results in contact corrosion.Copper seals (62, 62a) renew. Leaktightness of all connections examine with engine running. Special tool
The fuel pump pack is located on the right ahead of the rear axle on the frame floor looking in direction of travel.
- Replacing check valve at fuel pump 2 (M3m2)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Pay attention to safety instructions!Overpressure in fuel tank reduce by opening pressure cap, closing. Ground cable at battery disconnect, connect. Cover (69) take off, fit on. Fuel suction hose (53) and fuel delivery hose (52) pinch with clamp (51) 000 589 40 37 00, slacken clamp. Fuel line (60) remove and install. Collect remaining fuel.
Tightening torque 26 Nm as reference value.Copper seals (62) renew. Check valve (63) remove and install. Collect remaining fuel.
Tightening torque 26 Nm as reference value.Copper seal (62a) renew. Leaktightness of all connections examine with engine running. Special tool
The fuel pump pack is located on the right ahead of the rear axle on the frame floor looking in direction of travel.