Adjustment of the injection nozzles (after testing) - ra07016026750x(6750)

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

Engines 602.96, 603.96/97 TURBO in Models 124, 126, 140, 201

Preceding work:

Removing and installing injection nozzles (07.1-6810).

Testing injection nozzles (07.1-6712).

Operation no. of operation texts and work units or standard texts and flat rates: 07-6750 or 07-6752

Fig 1: Identifying Injection Nozzles Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Injection nozzles	strip down (1).
Nozzle needle (31)	remove, install, visual and sliding inspection; clean center and longitudinal bore of hole pintle nozzles; install in the same nozzle body.
Nozzle body (32)	remove combustion residues.
Intermediate disc (33)	dress on surface plate.
Pressure pin (34)	remove, install, point must be facing toward top section.
Nozzle tensioning nut (35)	unscrew, screw on, tightening torque 70-80 Nm.
Compression spring (36)	remove, insert.
Holder (37)	to strip down and assemble the injection nozzles, clamp in protective jaws of vice.
Steel washer (40)	set for ejection pressure. Specification: 135-145 bar for new or newly set nozzle, at least 130 bar for used nozzle. Ejection pressure higher or lower depending on thickness of washer. 0.05 mm results in approx. 3 bar pressure difference.

Special tools

Fig 2: Identifying Special Tools 00 (001 589 66 21 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 3: Identifying Special Tools 07 (000 589 00 68 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 4: Identifying Special Tools 03 07 32 (001 589 65 09 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Reconditioning

Disassemble injection nozzle by clamping body in vice with protective jaws so that the leak oil line connections are not damaged.

Fig 5: Clamping Injection Nozzle Body In Vice
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Clean nozzle needle and nozzle body with a brass wire brush.

Fig 6: Cleaning Nozzle Needle And Nozzle Body
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Remove combustion residues on seat of nozzle needle with the scraper.

Fig 7: Removing Combustion Residues On Seat Of Nozzle Needle
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Visual and sliding inspection.
Dip nozzle in filtered diesel fuel. With the nozzle body held upright, the nozzle pintle must lie toward the nozzle seat as a result of its own deadweight.
Dress intermediate disc (33) on the surface plate.
Assemble nozzle holder with injection nozzle. Ejection pressure is set with the steel washer (40). Ejection pressure is higher or lower depending on thickness of the washer; 0.05 mm results in approx. 3 bar pressure difference.
Test injection nozzles (07.1-231). Set if necessary.

Fig 8: Identifying Injection Nozzles Components
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.