Removing and installing centrifugal governor - RA27037220520X(27-520)

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.

Operation number of the operation texts and work units or standard texts and flat rates:

Fig 1: Identifying Centrifugal Governor Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Transmission (1)	Lower a little at the rear by removing/installing rear engine mount. Disconnect plug for starter lockout switch (items 1-3)
Cover (46)	Press in and remove with snap ring (47). Check O-ring (48) and replace if necessary (item 4).
Axial retainer nut (44)	Unscrew, screw in, 8 Nm (item 5).
Axial retainer (43, illustration item 6)	Turn to correct position with a screwdriver.
Centrifugal governor (50)	Remove, install. Check regulator valve (items 8 and 9).
Helical gear (41)	Detach by removing circlip (40). When installing, the driver pin must engage in the bore in the helical gear (item 8).

Removing and installing

Remove rear engine mount.

Fig 2: Locating Engine Mount
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Remove rear engine mount.
Unlock plug (8) by turning white plastic ring upwards in direction of arrow.
Disconnect plug (8).
Press cover (46) and take out snap ring (47) with cover.
Installation note

Push cover (46) outwards again until it rests against the snap ring (47).

Fig 3: Identifying Press Cover And Take Out Snap Ring With Cover
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Slacken nut for axial retainer (44).
Installation note

Tightening torque 8 Nm.

The axial retainer is correctly fitted when the slot (arrow) is horizontal.

Fig 4: Identifying Slacken Nut For Axial Retainer
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Swivel axial retainer (43) away in a counterclockwise direction using a screwdriver in the slot (arrow) (corresponds to position "B" in the cross section).
Installation note

Rock centrifugal governor gently back and forth in an axial direction turning axial retainer (43) clockwise

until it engages correctly (position "A" in cross section).

Fig 5: Identifying Secondary Pump, Axial Retainer And Cover
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Pull out centrifugal governor (50).

Fig 6: Identifying Centrifugal Governor
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Remove circlip (40) and pull off helical gear (41).

Fig 7: Identifying Circlip And Helical Gear
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Installation note

Mount helical gear (41) in such a way that the driver pin (arrow) engages in the bore in the helical gear.

Fig 8: Identifying Helical Gear
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Move flyweights and check smoothness of control valve in the openings (arrows).
The regulator valve must move easily. If necessary, wash out the centrifugal governor and blow-dry with compressed air. If the regulator valve cannot be made to run smoothly, replace the centrifugal governor.

In this case, use the helical gear (41) from the old centrifugal governor.

Fig 9: Locating Control Valve Opening
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.