[Healeys] Followup--- Girling Brake Servo Rebuild
bspidell at comcast.net
Sat Apr 18 17:06:58 MDT 2015
Been a long time, and probably with the earlier product, but IIRC I just
sprayed it over whatever was left of the original dry lube. I probably
scuffed the inside of the canister with Scotchbrite or emery cloth and
cleaned it with brake cleaner. Probably did a couple coats, just like
any other paint. I remember I had to buy 2 cans of it--and used about a
tenth of a can--and had to pay a bunch for hazmat shipping. The
remainder was unusable after a couple years.
In hindsight I think I probably didn't need to do it, as the original
coating appeared to be intact and the piston wasn't sticking.
On 4/17/2015 6:16 PM, R. Cobb wrote:
> Michael Salter was kind enough to inform me that the vacuum chest of
> the servo is steel rather than aluminum, as I had stated.
> So, what follows is Sandstrom's application protocol for steel:
> "Application on steel. Pre-clean the steel surface with aliphatic
> naphtha or any other EPA compliant cleaner that sufficiently
> cleans surfaces to pass ASTM F22. Sandblast the surfaces with 180-220
> grit aluminum oxide (25-50 RMS optimum). Phosphate
> IAW MIL-DTL-16232 (weight should be 11-22 g/m2), type M, class 3 or
> type Z, class 3."
> Any comments from those who may have used the Sandstrom dry lube
> products in the past?
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