Singer 251-2 - Page 27

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
27
INSTRUCTIONS
FOR
REMOVAL AND
REPLACEMENT
OF
PRINCIPAL
ASSEMBLIES
CAUTION
TO
MECHANICS
Machines
of
Class
251-
are
made
with
extreme
precision
in
machining
and
assembly,
and
the
"Superfinish"
process
provides
microscopically
smooth
bearing
surfaces.
Therefore,
special
care
should
be
taken
not
to
permit
any
misalignment
of
parts
or
to
cause
any
scratches
or
nicks
on
the
bearing
surfaces
by
careless
assembly
or
handling
of
ports.
Any
such
damage
might
render
the
machine
incapable
of
the
long,
trouble-free
service
for
which
it
is
designed.