SME 30/2 Controller

The second-hand SME 30/12 ibought recently also has the phenomenon fo oil leakage in the column. How to deal with？Thanks

The only way to deal with it is to order Topping Oil for the dash pots from SME. 
You will need to fill the pots to the required height (SME can provide drawing showing fill level). The upper section will need to be lifted off. This requires o-rings, platter, underside rubber counter pull belt and tower supports removed. 
 SME had procedure for all of this. They will email you pdf.  It’s actually very easy but requires 3 people or setting up a support to rest plinth on. 
 If it’s only a slight amount that leaked out don’t bother. 
 I had a lot that came out of 1 pot only. Don’t freak out if it’s just a small amount around the base of the pillar. 

Thanks hifipf very much 

Also unscrew the grounding wire from the post!

Thanks very much. And I get new problem. When I adjust the column gap to meet the gauge A terminal, press the 33 button, the speed is accurate and stable, but the light continues to flash and cannot be locked, and the upper board has obvious swing. But when I lowered about 1mm, this phenomenon disappeared and everything was normal . This phenomenon has not appeared in two states in 45 and 78, they can be locked quickly.

What could be the reason for this? Thanks