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Old 05-09-2011, 03:27 PM
Stretch's Avatar
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Join Date: Sep 2009
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W123 (300D) steering box - question about steering nut and working piston

G'day All,

I'm busy playing with my steering box at the moment and I've reached a bit of a problem.

The steering box is in bits and I'm looking through the FSM (chapter 46-220) particularly the bit about the working piston and the steering nut.

The steering nut is the bit that sticks out the side of this tubular bit (the working piston) that houses the 24 (count 'em!) recirculating balls.



Now - here's the problem - the FSM (page 29) states that the steering nut should move with a friction torque of 6 to 10 Ncm (that's Newton CENTIMETERS not meters)...

...mine just flops about flaccidly...


Has anyone ever taken a box to bits this far before and found a stiff one?

Oh yeah - to adjust it you need to tighten the lock nut and cover to 200 to 240Nm - eeek - that could make your eyes water!
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Last edited by Stretch; 05-09-2011 at 03:29 PM. Reason: Added in the FSM page number
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