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Michael Salter was kind enough to inform me that the vacuum chest of
the servo is steel rather than aluminum, as I had stated. <br>
<br>
So, what follows is Sandstrom's application protocol for steel:<br>
<br>
"Application on steel. Pre-clean the steel surface with aliphatic
naphtha or any other EPA compliant cleaner that sufficiently<br>
cleans surfaces to pass ASTM F22. Sandblast the surfaces with
180-220 grit aluminum oxide (25-50 RMS optimum). Phosphate<br>
IAW MIL-DTL-16232 (weight should be 11-22 g/m2), type M, class 3 or
type Z, class 3."<br>
<br>
Any comments from those who may have used the Sandstrom dry lube
products in the past?<br>
<br>
Thanks.<br>
<br>
Bob<br>
<br>
<div class="moz-cite-prefix">On 4/17/2015 2:04 PM, Michael Salter
wrote:<br>
</div>
<blockquote
cite="mid:CAB3i7L+nRy+_0dGQ5nHXiTX8w6NuBZOYL7vmRK3fwJC-NLJSNQ@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_default" style="font-family:comic sans
ms,sans-serif;font-size:small">Hi Bob,<br>
</div>
<div class="gmail_default" style="font-family:comic sans
ms,sans-serif;font-size:small">I'm not sure from your message
if you are under the impression that the vacuum chest of the
Girling servo is made of aluminium. It is actually steel if
that makes any difference to the application protocol.<br>
<br>
</div>
<div class="gmail_default" style="font-family:comic sans
ms,sans-serif;font-size:small">Michael S<br>
</div>
<div class="gmail_default" style="font-family:comic sans
ms,sans-serif;font-size:small">BN1 #174<br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Fri, Apr 17, 2015 at 2:50 PM, R.
Cobb <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:rcobb@earthlink.net" target="_blank">rcobb@earthlink.net</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">In
anticipation of rebuilding my Girling Servo (I did it
successfully 30+ years ago), and after reading some archival
tips (going as far back as the early 1990's), I have ordered
the dry film lube from Sandstrom.<br>
<br>
Their #26A product has evolved to the current #28A
formulation. The data sheet for the dry film lube indicates
the following directives:<br>
<br>
"Application on aluminum and aluminum alloys. Pre-clean the
aluminum surface with aliphatic naphtha or any other EPA
compliant cleaner that sufficiently cleans surfaces to pass
ASTM F22. Sulfuric acid anodize IAW MIL-A-8625 and seal the
surface."<br>
<br>
Sandstrom's tech support director has been out all week at
an industry conference, so I've not been able to determine
if, given the application in question, the involved protocol
is essential.<br>
<br>
Any input from others who have successfully used this, or
its predecessor, product, regarding surface preparation?<br>
<br>
By the way, when I spoke with sales and indicated I was
interested in using their product in relation to the
restoration of a vintage British auto, the salesperson said,
"Oh, an Austin-Healey?"<br>
<br>
Thanks in advance.<br>
<br>
Bob<br>
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<br>
<br clear="all">
<br>
-- <br>
<div class="gmail_signature">
<div dir="ltr">
<div>
<div dir="ltr"><i><font size="2"><span style="color:black">If
you can't fix it with a hammer, you've got an
electrical problem.</span></font></i><br>
<br>
</div>
</div>
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<p class="" avgcert""="" color="#000000" align="left">No virus
found in this message.<br>
Checked by AVG - <a moz-do-not-send="true"
href="http://www.avg.com">www.avg.com</a><br>
Version: 2014.0.4800 / Virus Database: 4311/9562 - Release Date:
04/17/15</p>
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