I cleaned the contacts without loosening the adjustment setting.
I did not sand the contacts, but cleaned these with a whetstone.
Works fine now. Contacts were havily pitted, the stroke is a bit longer than
original.
I checked the gap according the Haynes manual ones and it still was perectly
within limits.
So i have drawn the conclusion the adjustment is not very critical, once the
basic settings are not touched.
One easily can replace the contacts if needed in the same way and I expect
no problem as well.
New contacts need to be soldered in though...
Cheers,
Hans
'71 BGT - New Racing Green BLVC25 now picture available....
> -----Original Message-----
> From: Fred Pixley [SMTP:fpixley@kingston.net]
> Sent: Friday, October 22, 1999 1:35 PM
> To: mgs-digest list
> Subject: Fuel Pump Stroke
>
> Thank you to Hans, Bob and Paul.
>
> I readjusted exactly as Paul recommended, according to the Hayne's manual
> and I would suggests that others follow that advice although it should
> probably work just fine with any close setting. A longer stroke might
> stretch the diaphragm or put out excessive pressure and cause flooding.
>
> >It *is* important to get reliable contact operation. The workshop manual
> >describes it thus: "With the pump held horizontally, slowly unscrew the
> >diaphragm while at the same time actuating it, until the rocker just
> throws
> >over.Unscrew the diaphragm until the hoes are aligned, then unscrew it a
> >further quarter of a turn (four holes)."
>
> <PaulH.
>
> >-----Original Message-----
> >From: Fred Pixley <fpixley@kingston.net>
> >To: mgs-digest list <mgs@autox.team.net>
> >Date: 20 October 1999 14:14
> >Subject: Fuel Pump Stroke
>
>
> >>I recently cleaned up a non-working SU electric fuel pump I bought at an
> >>autojumble, actually the Bronte Creek show. It will be chucked in the
> boot
> >>of the BGT for use as a spare. I sanded the points and freed up the
> plunger
> >>and diaphragm. It looks nice with the body sandblasted and clearcoated.
> >>This was from an older Healy from the 50's and has no diodes and works
> fine
> >>in pos or neg ground configuration.
> >>When I took it apart I didn't count the number of turns the plunger was
> >>screwed in and I just guessed at it upon reassembly. I allowed for a
> >>fairly
> >>short stroke and it pumps air OK. How important is it to adjust the
> stroke
> >>on this thing?
> Fred Pixley
> Napanee, Ontario, Canada
> fpixley@kingston.net
>
>
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