Pressure Line
Oil Delivery Line Power Steering, Replacing (LHD)
Special tools:
115 8957
116 1075
Removal
Hint: Turbocharged engines: Note that if the connection nut for the pipe coupling cannot be installed as described, the turbocharger control must be removed.
Preparations
Open the hood.
If necessary, remove the cover over the headlamps.
Remove the engine cover.
Does not apply to B41 84SM/SJ: Remove the mounting nuts for the heat deflector plate.
Remove the plate from the cowl panel.
Remove the heat deflector plate from the steering gear housing by removing the mounting screw (A) and then pulling the plate away from the steering gear housing (clamps). Move the heat deflector plate as far as possible to the side.
Removing the delivery line from the power steering pump (does not apply to B41 84SM/SJ)
Remove the pipe clamp (A).
Remove the pipe clamp (B) from the pump support.
Install 115 8957 on the inlet hose. Clamp the hose.
Collect the oil in a container and wipe up any spilled oil using a rag.
Disconnect and release the pipe connection nut (C). Pull out the pipe.
Remove the O-ring and plug the pipe to prevent oil running out.
Move the pipe to one side and allow as much oil as possible to drain out.
Removing the delivery line from the power steering pump (B4184SM/SJ)
Remove the pipe clamp (A).
Remove the pipe clamp (B) on the distributor side.
Remove the pipe clamp (C) at the generator bracket.
Install 115 8957 on the inlet hose. Clamp the hose.
Collect the oil in a container.
Remove the banjo screw (D) and remove the pipe.
Plug the holes to prevent oil running out.
Move the pipe to one side and allow as much oil as possible to drain out.
Removing the delivery line from the pipe clamps on the power steering side
Position a container under the steering gear to collect the oil.
Use a rag to catch spilled oil.
Remove the pipe clamp (A) from the mounting, right-hand side.
Remove the heated oxygen sensor (H02S) cable harness from the clamp (A), if applicable.
Disconnect the pipe clamp (B), slide the clamp off the rubber and remove the clamp.
Release the rubber from the delivery line by moving the return line back a little.
Disconnect and release the pipe connection and pull out the pipe.
Immediately plug the opening in the steering gear housing and the pipe.
Remove the pipe and O-rings.
Empty the oil out of the pipe.
Installation
Installing and aligning the delivery line on the steering gear side
Clean the connections thoroughly.
Install new O-rings on the pipe.
Position the pipe. Remove the plug from the steering gear housing. Finger-tighten the pipe connection.
Secure the rubber (B), positioned on the return line, over the delivery line.
Securing the delivery line on the steering gear side
Install the pipe clamp using the screw (A).
Slide the pipe clamp (B) over the rubber and align the clamp for securing. Place the pipe clamp directly opposite the threaded hole. B4184SM/SJ:
Insert and finger tighten the screws.
Does not apply to B4184SM/SJ: Press the heat deflector plate with the clamps into place over the steering gear housing. Position the pipe clamp (B) directly opposite the hole and finger-tighten the screw.
Tighten the nut for the pipe connection on the steering gear housing. Tighten to 15 Nm.
Tighten the pipe clamps: M6 10 Nm, M8 15 Nm. Does not apply to B4184SM/SJ: Secure the cable for the heated oxygen sensor (HO2S) to the pipe clamp (A) before tightening.
Reinstalling components (Does not apply to B41 84SM/SJ)
Reinstall the heat deflector plate on the cowl panel. Tighten the screws. Tighten to 10 Nm.
Installing the delivery line on the power steering pump (does not apply to B41 84SM/SJ)
Position the pipe (pipe coupling) directly opposite the pipe connection using a new O-ring.
Apply thread sealant 161 075 on the threads for the pipe connection nut.
Finger tighten the pipe connection nut.
Finger tighten both pipe clamps.
Now tighten the pipe connection nut: -1999 to 19 Nm and 2000- to max. 25 Nm.
Remove the lock grip pliers.
Tighten the pipe clamps: M6 10 Nm, M8 20 Nm.
Installing the delivery line on the power steering pump (B4184SM/SJ)
Install a new O-ring. Align the pipe.
Finger tighten the banjo screw.
Finger tighten both pipe clamps.
Now tighten the banjo screw. Tighten to 18 Nm.
Remove the lock grip pliers.
Tighten the pipe clamps. Tighten to 25 Nm.
Filling/bleeding the power steering system,
Fill the power steering reservoir with oil. Bleed the system. See specifications for oil grade, refer to Specifications.
Apply the parking brake. Start the engine.
Turn the steering wheel from lock to lock several times.
Check the function. Check that there is no leakage.
Check the oil level. Top up if required.
Use Pentosen CHF11S. Install the engine cover.
Reinstall the cover over the headlamps if it was removed.