I have been asked to reseal a leaking W126 steering box for a customer .Stripping it down it ,I could easily spot the hardened and leaking seals everywhere but the thick mud inside the gear case was something new.
This caused the case to really badly worn and scored .
What I need to know,and it isn't in the WSM etc is ,how far can the gear case be worn before it's scrap , and has anyone tried running a hone through one to clean up the piston bore ? i haven't miked the bore yet but a rough look says it has to .50 mm worn at the end of the stroke.
The pic of the piston assembly shows some of the mud and the other shows the mud in the gear case.