Raytheon Beech Baron E55 - Page 539

CJ3eechcraft
BARON 55
AND
58
SHOP
MANUAL
b. Remove
the six
slip ring
attach bolts and
washers.
WARNING
c.
Removethe
stip ring.
PROPELLER
SLIP
RING
INSTALLATION
I
Before
moving
the
propeller,
make
certain that
the
magneto/start
switch
(GOODRICH)
is off
and that the
engine
has
cooled
a.
Place
the
slip
ring
in
place
with
AN93SB416
star
completely.
There
is
always
some
danger
of
a
cylinder
firing
when the
washers
between
the
slip ring
and the
spinner
bulk-
head.
propeller
is moved.
b.
Torque
the
six
slip
ring
attach
bolts to
approxi-
CONTINUITY TEST
(GOODRICH)
(TE-
1182
mately
25
inch-pounds being
careful
not to
compress
AND
AFTER,
TH-1231
THRU
TH-1396
the
star
washers
too
much,
which
provides slip
ring
EXCEPT
TH-1389,
TC-2419,
TC-2450
AND
alignment
adjustment.
AFTER)
c.
Install the
propeller
as
described
in
Section
7,
After
removing
the
plug
from the
timer,
use an
ohm-
INSTALLING
THE PROPELLER.
meter to
check
continuity
from:
d.
The
slip
rings
may
be
properly aligned
as
a.
Pin
D
of the
plug
to
the terminal
of
the
propeller
desc’ibed
in
SLIP
RING ALIGNMENT
in
this
section.
deice boot
on
the
right engine.
BRUSH
BLOCK/MODULE
RES/STANCE
I
b.
Pin
F
of
the
plug
to
the terminal
of the
propeller
CHECK
(GOODRICH)
deice boot
on
the
left
engine.
c.
Pin
G
of the
plug
to
ground
a.
To
check
for
an
open
circuit,
a
short,
or
high
resis-
tance
in the
brush block
or
brush
module,
measure
d. Ground terminal
of the
propeller
boot
on
the
right
the resistance
from the face of the brush
to
its termi-
engine
to
ground.
nal
stud
with
a
low
range
ohmmeter.
The
probe
con-
e.
Ground
terminal of
the
propeller
boot
on
the
left
tacting
the
brush should
have
a
minimum
contact
sur-
engine
to
ground,
face of
1/16
square
inch.
BRUSH-TO-SLIP
RING RESISTANCE
b. If this resistance
measures
over
0.013
ohms,
TEST
(GOODRICH)
locate
and
repair
the
cause
of
excessive resistance.
c.
If
the
resistance
is
infinite,
locate
and
correct
the
a.
To check for incorrect resistance
or
the
presence
open
circuit
or
ground,
or
else
replace
the
brush.
of
a
short
or
open
circuit
at
the
brush-to-slip ring
con-
tact,
disconnect
the
harness
at
the timer and
check
d. Check
the resistance
between the terminal studs
the resistance from each
deicer circuit
lead
(pins
C, D,
and/or
connector
pins.
This
resistance
should
not
be
E,
and
F
of
the
harness
plug)
to
ground
with
a
low
less
than
.5
megohms
after
one
minute.
Use
a
tester
I
range
ohmmeter.
having
a
500-VDC,
1000-megohm capacity.
b. If
the
resultant
readings
are
not
1.55
to
1.78
NOTE
ohms,
disconnect
the deicer
lead
straps
to
measure
The
preceding
adjustments
may
affect
heater
resistance
individually.
Individual boot resis-
the
clearance
between the brush
block/
tance
should
measure
between
4.58
and
5.26
ohms.
module
and
slip
rings. Consequently,
c.
If the
readings
in
the first check
are
not
within the
after
slip
ring alignment,
a
check should
accepted
limits but those
in
the
second
check
are,
the
be
made
to
ascertain
that
a
distance
trouble
is
probably
in the
brush-to-slip
ring
area.
If the
from
1/32
to
3/32
inch
is maintained
readings
in
the
second check
are
also
off,
the deicer
between
the
brush
block/module
and
concerned is
damaged
and
must
be
replaced.
slip
ring
surface.
Refer
to
Figure
11-30.
I
I
PROPELLER
SLIP RING
REMOVAL
SLIP
RING ALIGNMENT
(GOODRICH)
(GOODRICH)
The
slip
rings
are
properly
aligned
when
they
run
in
a
a.
Remove
the
propeller
as
described
in
Section
7,
true
plane
relative
to
the brush
block/module.
This
REMOVING THE PROPELLER.
condition
may
be
checked
by
attaching
a
dial indicator
815
11-59