Hitchcocks Forum

Hi all! What about grease when doing maintenance on the disk brake caliper? I am specifically thinking of the two pins and where there is any rubber part involved. It´s amazing how much you can read about such a small (and trivial?) little detail!

Anyway, some people say "copper grease" and they seem to put that on just about everything that needs to be greased. Others however point out that since there is copper involved, there could be galvanic corrosion if there is any aluminium nearby. Whilst having no experience of my own about this, I tend to believe them. It is also stated that there should be no mineral based grease at all close to any rubber parts. So, what´s left? There is silicon grease available that is claimed to be
"mineral free". What about old fashioned vaseline? In theory not good for rubber either, but...?

What would you suggest?

Best regards,
Gunnar

Red rubber grease is the normally recommended stuff for car brakes.

There's an aluminum version of copper grease that we were using in the RAF a quarter of a century ago.

As long as there are no petroleum based ingredients you will be fine.
Proslip is a good brand, https://proslip.com/ ,of calliper pin lube as is this one I used to use.
I now use,
100ml Silicone PTFE Grease Lubricant For Assembly Brake Discs.
https://www.ebay.co.uk/itm/100ml-Silico ... 2749.l2649

I use red rubber grease on any non-sealing parts which involve friction between metal and rubber (eg the sliding pins). I use very sparingly applied moly grease on metal to metal parts (the pad pins). I use copper grease on threads I do not want to sieze (those little nippy slot-head caps that go over the top of the pad pins).

I use brake fluid to lubricate the pistons and seals themselves.

Thanks guys, I appreciate your comments.
/Gunnar