throw the old copper washer on a cookie sheet and bake it at 400 plus
degrees in the oven for a while it will aneal it and you can use it over.
let it air cool . do not rush it with water or oil!
chuck.
----- Original Message -----
From "ET Piano" <etpiano at excite.com>
To: <spridgets-digest@autox.team.net>
Sent: Wednesday, August 22, 2001 4:28 PM
Subject: Somebody's wrong, but it ain't me
> Well, between the Haynes manual and the Moss catalog, somebody's wrong,
but
> not me.
>
> My 1979 Midget has a brass housing for the brake failure warning switch.
> The Moss catalog thinks that brass was for 1975 and earlier Midgets.
Since
> the Moss catalog lists replacement switches by housing material, but lists
> housing material by year, I was misled into buying the wrong part. That
> wouldn't be so bad, but at $8 shipping to me and another $4 back to them,
> that's practically half the cost of the buggered switch.
>
> In case anyone else needs to know, the part you need is Moss number
> 181-955. The OEM part number is AAU2454. This switch is the same one used
in
> dual-line servo assist 1994.5 MGBs from 386601 forward. (Not, as I'd
> guessed, TR6s).
>
> The Haynes manual illustration of the piston in the PWDA (Pressure
Warning
> Differential Actuator) just ain't what I got, although it *does* resemble
> what is used in Moss' TR6 illustration. Moreover, the instructions for
> resetting the TR6 switch are exactly those needed to reset the Midget
> switch, and not the Haynes instructions. I reckon somebody at Leyland
> changed the spec between the time Haynes gathered information and went to
> press.
>
> Which raises the point of which housing the Moss repair kit (181-995)
> fits. The Little British Car Co. (which I recommend over other outfits
> mentioned earlier in another thread) shows this as a chrome-bumper MGB
part.
> Has any lister bought one of these? What's in it?
>
> The repair kit Moss lists as NA for the 181-955 switch is 180-795, and is
> illustrated with two O-rings and a spring, which is what the Midget piston
> looks like it needs.
>
> For the Midget piston, you need at least a couple of O-rings 5/16 x 3/16
x
> 1/6. The original O-rings from the piston seem flattish on the outside
> circumference, but I don't know if that's not the result of being pressed
in
> the bore for 20-odd years. You also need a new copper washer of the right
> thickness. That's kind of difficult, because stock copper washers for oil
> drain plugs at the auto supply are the right bore, but twice as thick as
you
> need. It's a bugger to shave one down. I finally abandoned that and just
> resurfaced the 20-year-old copper washer. But I'm not happy about it.
> Cheers,
> Rick in MD
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