Removal and Installation of Control Unit

R AND R LEVEL CONTROLLER

Tightening Torque

Hex. head and hex. socket screws on level controller: 45 Nm
Connection to level controller:
M 14 x 1.5, 25 Nm
M 1O x 1, 15 Nm
Cap screws of pressure oil lines:
M 1O x 1, 15 Nm
M 12 x 1, 20 Nm

Note





The level controller is provided with a bleed screw as standard equipment since March 1977. Simultaneously, the distributor with bleed screw installed up to now on model 116 and 123 in oil line from level controller to lefthand pressure reservoir is no longer installed.





Upon removal of bleed screw, the required checkup can be performed. Testing and Inspection

Removal

1 Drain pressure oil system. Procedures





2 Loosen line connections (B1, B2 and C), using open box wrenches.

Attention!
On level controller, never loosen clamping screw for fastening lever on control shaft

A subsequent location of lever in relation to control shaft is not possible.

3 Unscrew connecting rod (7) on lever (3a) of level controller.

Attention! To loosen connecting rod, unscrew hex. nut on lever (3a) of level controller. If required, hold ball pin of plastics-mounted ball joints with open-end wrench 10 mm or hold ball pin of steel-supported ball joints with an angular screwdriver.

On plastics-mounted ball joints never pull ball pin out of ball socket


4 Loosen both hex. screws for attaching level controller to bracket (8) and remove controller.

Note: In the event of leaks, mount new 0-ring, part No.006 997 69 45 on parting surfaces of both housings.

Installation

Version Up To 8/85:

Version Starting 9/85:

Attention! When exchanging a level controller on model 123 (version with pressure line connection M 12 x 1) transfer connection (31), part No. 123327 0365, of pressure line (B 1), and on model 126 additionally connection (3m), part No.123 327 04 65, of return flow line (C). Also replace copper sealing ring (3n).

The four bolts for housing halves of level controller should be tightened when level controller is energized with oil pressure.





5 Attach level controller to bracket, connect oil lines.

6 Check ball joints of connecting rod for easy operation and wear.

On version with steel joints, remove safety clip (7b) and pull off ball pin. Provide ball sockets with grease. Renew damaged sealing washers (7c) or worn ball joints.

Plastics-mounted joints require no service.

7 Attach connecting rod to lever of level controller. If required, hold ball pin with angular screwdriver or 10 mm fork wrench.

8 Check vehicle level.

9 Check adjustment of headlights, if vehicle level has been changed.