Checking and adjusting friction torque of steering gear - RA46097650120X(46-0120)

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 work:

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

Removing and installing steering gear (46-3400)

46-3230

Fig 1: Checking And Adjusting Friction Torque Of Steering Gear

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Steering gear	mount on assembly support 140 589 00 59 00 with two screws and clamp in the vise.
Total friction torque	measure at steering shaft with friction torque meter 123 589 02 21 00 and wrench socket insert 123 589 00 08 00 by slowly turning the steering shaft from stop to stop several times.
Lock nut (50)	slacken. Turn adjusting screw (45) 1/4 turn in stages direction "a" = increases friction torque direction "b" = reduces friction torque Tighten collar nut to 60-65 Nm, holding adjusting screw (45) tight.
Total friction torque	re-check after tightening collar nut. Observe notes

The friction torque in the center area should be 30-60 Ncm above the previously measured basic friction torque.

Example :

Friction torque of steering gear after setting

Basic friction torque 60 Ncm

Increase in center area 30-60 Ncm

Total friction torque 90-120 Ncm

Fig 2: Friction Torque Adjustment Graph

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

SET VALUE

When the steering shaft is over the center position, the total friction torque should be	New steering	110-150 Ncm
	Used steering	100-120 Ncm

Special tools

Fig 3: Identifying Special Tools (123 589 00 08 00 46)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 4: Identifying Special Tools (123 589 02 21 00 46)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 5: Identifying Special Tools (140 589 00 59 00 46)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

NOTE: The steering gears are equipped with play compensation. However, this only acts in the center range of the steering gear.

An adjustment can therefore only be carried out noting the following points:

Do not adjust friction moment above the specified value.
When turning the steering gear no high spots should be detected after adjustment.
The steering must self-center correctly when driving straight ahead on a test drive.

On steering gears 765.900 (model 201 up to vehicle chassis end no. A 084024) the clamping bush (83) must be detached to adjust the friction moment. After adjusting the friction moment, push the clamping bush (83) onto the steering shaft so that both surfaces are parallel to the mounting points of the steering gear and the milled section points towards the pitman arm (arrow).

Push on support ring (84) and tighten the nut (85) to 50 Nm.

Fig 6: Identifying Clamping Bush (83), Support Ring (84) And Nut (85)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

On steering gears 765.922 and 765.950 (model 202), the sleeve (23j) with two surfaces be detached from the steering shaft.

After adjusting the friction moment first

align the clamping slot of the sleeve (23j) of the marking notch of the steering shaft, then
push on sleeve (23j) up to the stop on the steering shaft and secure with new locking ring (23i).

Fig 7: Identifying Sleeve (23j) And Locking Ring (23i)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.