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MMD > Archives > October 1997 > 1997.10.17 > 13Prev  Next


Ampico B Drawer - Correction
By Bob Taylor

I previously responded to Randy's inquiry:

> Randy,
>
>   The spring inside the spill box which sets the minimum pump pressure is
> starting to weaken.  There really is no good way to fix this except to get
> a stronger spring.  Page 16 shows this spring and tells how it operates.
> Until you get a new spring, you can induce a tiny leak in the line going
> to the sleeve pneumatic.  A #55 bleed should do.  The trouble with this is
> that it makes the pump vacuum too high during rewind.  It also makes the
> sleeve pneumatic a little sluggish.
>
> The pedal regulator sounds like it is set ok.  If the pump is set at 18
> inches, the rewind will work better.  I must caution you about strain to
> the pump at vacuum level over 75 inches.  It is very easy to snap a
> connecting rod at higher levels--even when turning the pump by hand.  The
> connecting rod are wood..

To Randy and MMD readers I need to make one small correction to my posting
in MMD on 971015.  The factory really did not necessarily glue the soft
pedal unit valve assembly to the pedal valve unit.   It is usually stuck
there due to the paint on the mating surface--thus giving the effect of
glue.

Bob


(Message sent Fri 17 Oct 1997, 16:08:21 GMT, from time zone GMT-0500.)

Key Words in Subject:  Ampico, B, Correction, Drawer

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