Front pressure accumulator - Removal and installation - RA32001290615X(32-0615)

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.

Preceding operations:

Drain hydraulic system (32-0630) .

Operation no. of operation texts and work units or standard texts and flat rates

32-0830

Fig 1: Identifying Front Pressure Accumulator Remove/Install Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Front wheel	remove, install lug bolts, 110 Nm.
Wheel-housing guard	remove, install (Position 2).
Pressure lines (S1 and P4) at accumulator (14)	disconnect, connect, using line wrench 116 589 00 17 00. Tightening torques: S1 = 14 Nm. P4 = 30 Nm.
Accumulator (14)	unbolt, bolt on at bracket (14e). Replace self-locking nuts, 20 Nm.

Special tool

Fig 2: Identifying Special Tools (116 589 00 17 00 32)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

NOTE: If either of the pressure accumulators is defective, replace both units on the axle.

Removal and installation

Remove front wheel.
Installation note

Tighten lug bolts, 110 Nm.
Unscrew the four hexagon bolts (arrows) and remove the wheel-housing guard.

Fig 3: Locating Four Hexagon Bolts
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Use a box-end tube wrench to disconnect the high-pressure lines (S1 and P4) from the pressure accumulator (14).
Installation notes

Tightening torques:

S1 = 14 Nm.

P4 = 30 Nm.

Fig 4: Identifying High-Pressure Lines And Pressure Accumulator
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Unscrew the three self-locking hexagon nuts (14f) and remove the pressure accumulator (14).
Installation note

Replace self-locking nuts, 20 Nm.

Fig 5: Identifying Self-Locking Hexagon Nuts And Pressure Accumulator
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Notes on scrapping

The relevant safety provisions are to be observed when scrapping accumulators.

In order to eliminate the basic pressure in the accumulator, drill carefully on the convex side with a 3 mm drill until the gas flows out. To prevent accidents caused by the outliving gas and to protect against drilling chips, safety glasses and gloves must be worn. The hole is to be drilled with the minimum possible feed.

Apply as little pressure as possible when drilling the orifice (arrow).

Fig 6: Locating Drilling Orifice Area
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Installation is performed in reverse sequence.