PIPER
COMANCHE
SERVICE
MANUAL
....
ClA'
I~
TO
...
All
.."
FIGURE 9·9. CUTOUT
REU.Y
AIR
GAP CHECK
AMD
ADJUSTMENT
current
now
to
the
required
1IID0UDt.
•
STOll
FIGURE 9·10. CUTOUT
RE
I..AY
POINT OPENING CHECK
AHD
ADJUSTMENT
Allow
lenerator
to
operate
at
this
speed
aDd
current flow for
15
minu.tes with
relulator
cover
in place
in
orcI.er
to
bring
the
voltage
reculator
to operatinC temperature.
e.
Cycle
the
&enerator
by
either
method
listed
in Step
(el
of
"Fixed
Resistance
~ethod"
of
"Volta.
Setting"
~oced\Ue.
f.
"ote
the thermometer re.:!ing and
select
the
uNormal
Range"
of
voltage
for
this
tempera-
ture
as
listed
ttl
specificatia1s
paragraph 9-41.
g.
Note
the
voltmeter
reacUnl with relu.lator
cover
in place.
h. Adjust
volt
..
e resWator
..
required
..
described
in Step
(h)
of
"Fixed
Resistance
Method"
of
"Voltag.
Setting
Procedure."
In
usiag
the
v.iable
resistance
method.
it
is
necessary
to re-
adjust
the
vuiab1e
resistance
after
each
yoltate
adjustment to
assure
that
8-l0
amperes are
flowing. Cycle &eneratar after
eacb
adjustment
before readine
voltage
regulator
setting
with
cover
in place.
9-34.
C
..
tout
Relay.
The cutout
relay
requires three
checks
and adjustments:
air
gap. point
Openinl,
and.
closing
voltage.
The
air
gap
and
point open1tl& ildjustments must be made with the
battery disconnected.
8.
Air
Gap -
Place
fingers
CIl
armature d.irectly above
core
and move armature down until
points
just
close
and tben measure
air
cap between. armature and
center
ot
core
(Figure
9-9). On
multiple ccmtact point
relays.
make
sure
tbat
all
points
close
simultaneously.
If
they do
i10[,
bend
sprinl
finler
so
they
do.
To
adjust
air
IIIP, loosen
t"Wo
screws
at
the
back
of relay and :-aise
or
lower
the
arm8Uue
as
required.
Tichten
screws
after adjustment.
b.
Point Opening - Check
POUlt
openmg
and
adjust
by
bending the upper armature
stop
(Figure
9-10).
c.
Closing
Vo1tale
- Connect reaulator to proper generator and
battery.
Connect
voltmeter
between the regulator
"GEN"
terminal and ground (Figure 9-11).
~Iethod
1 - Slowly
increase
generator
speed
and note relay
clos1D.1
voltage.
Oec:ease
3
83
EI..ECTRICAI.
SYSTEM
ISSUED:
8/18172
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