Power Steering Line/Hose: Service and Repair

Important notes

The principle of the plug and couplings for the pressure and return lines is the same. It is the diameters of the plug and coupling and of the pipelines that differ (return line = large diameter / pressure line = small diameter).

Plug-in couplings are components that permit simple, fast and precise connection of pipelines. These precision components must be handled carefully during repairs. Excess force during assembly work, damage to the sealing surface and soiling can cause leakage.

Perform preparations carefully when handling plug and couplings - e.g. cleaning and fitting the plugs - as repairs are possible only by replacing the affected line in most cases. Only the threaded part A (with fitted O-rings) and the holder C are available as individual parts for the plug-in coupling.




Tools

Plug-in couplings for steering hydraulic system




Component view

Note:
- Pressure and return lines have different dimensions.
Pressure line = nominal diameter 6, return line = nominal diameter 10.
- The plug-in coupling is opened by unscrewing.
It is joined by plugging together.
- Joint the plug-in connection only in a straight line. Never use excess force.
- After separating the plug and socket piece, carefully protect them against dirt and scratches with caps.
- Correct engagement must be checked with a gentle pull. Use special tool 9623 for this purpose.







Numbered procedures and instructions

Spare parts set plug-in couplings

Note: An assembly, consisting of a threaded part (complete with O-rings), holder and a mounting plug, is available as a spare part for the plug-in coupling.

This spare part is available for the pressure line (small pipe outer diameter) under the No. 999.230.539.10. This spare part is available for the return line (large pipe outer diameter) under the No. 999.230.540.10. These spare parts are listed under 4 03 01 in the Parts Catalogue.