[ARC5] DM-34 Data

[Richard Knoppow]

----- Original Message ----- 
From: "Robert Eleazer" <releazer at earthlink.net>
To: <arc5 at mailman.qth.net>
Sent: Saturday, December 08, 2012 5:23 AM
Subject: [ARC5] DM-34 Data


> Ken:
>
> Go over to BAMA and download the manual for the 
> SCR-608/628.  That will give you the schematic, although I 
> am disappointed with the data on the filters that is 
> provided in that document.
>
> When I cleaned and repacked the bearings in a DM-20, I 
> used Bendix Magneto Bearing Grease, because it seemed like 
> a logical choice, but mainly because I had it available.
>
> Wayne

     This brings up a  problem I've encountered in working 
on cameras and other equipment:  the manufacturer specifies 
some oil or grease by  maker and that lubricant is no longer 
available plus no specifications can be found.  Bendix 
probably did not make their own grease but repackaged 
something suitable.  Collins specifies a grease somewhere in 
a service note for the R-390. The grease is long 
discontinued but I was able to trace the original military 
spec to a new spec number and then to several currently made 
greases.  There are many kinds of greases available. I find 
information on them to be somewhat confusing.  A grease 
consists of oil in a binder of some sort intended to keep 
the oil on the surfaces where its needed. The binder has a 
large effect on the ability of the oil to lubricate so its 
very important to choose the right one.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com