Merc-O-Tronics 98 - MAINTENANCE PROCEDURES; Contact Point Cleaning and Air Gap Adjustment

2
3.
4.
RITTI.TR
FILE
Figure 40
TO
(TTAN
CONTACT
POINTS
(r00sril
UPPER
(0NTA$
suPPoRT
tl,louNTtNc
scREws)
CTEANING
CONTACTS
rf
an open transistor
was
foundintheprevious
check, the
large
voltage
regulator
contact
must
be
cleaned with
a
spoon
or riffler
file
as
illustrated
in Figure
40.
The
small
soft-alloy
contact
does not
oxidize
and must be cleaned
with
erocus
eloth or
other fine
abrasive material.
contacts
should
be washed
with
trichtorethylene
or some
other non-
toxic
cleaning
solution to
remove
any foreign
material.
After
cleaning
contacts
run
a
piece
of stiff
paper (such
as a
business
card)
between
contact
under tension,
thereby
removing
any
film
or
foreign
matter.
1.
Figure
4l
ADJUSTING
AIR
GAP
1.
After
cleaning
the
contacts,
set
Figure
41.
Push
the
armature
(not
the
flat
spring)
Oown
against
a
gauge.
Adjust the
upper
contact
support
so the
contacts
are
aligned
squarely
and
just
touch
when
the
support
screws
are tishtened.
AIR
6AP
{$rcK
wrTH
potilTs
JUST TOUCI{II,IG)
\l
\t.i
SUPPORT
MOUNTING
S(REWS
{r00s${
T0
sET Atn GAP)
the
air
gap
to
.070
inch
as shown
in
2
3.
{TURI,I
TO
ADJUST SITIING}
40