Raytheon Beech Baron E55 - Page 548

BARON
55
AND
58
SHOP
MANUAL
b. Remove
the
two
screws
in the
back
of
the
brush
N~OTE
block.
Friction from
the brushes
will
cause a
c.
Pull
the brush
holder
and
brushes
from
the
brush
concave
wear
pattern
on
the
slip rings.
block. Discard
the brush
holder and
brushes.
This
does
not
necessitate
replacement
or
machining
unless
rapid
brush
wear
is
d.
Replace
the
brushes
and
brush
holder
by
first slid-
encountered.
When
a new
brush
assem-
ing
the
brushes
into the
slots of
the
brush
block,
then
bly
is
installed
on
the
slip
rings
with
nor-
sliding
the
brush holder
into
place.
mat
wear,
the brushes
will
rapidly
seat
without
degradation
of
operation
or
ser-
e.
Install
the
two
screws
which
hold the
brushes
in
vice life.
place.
Torque
the
screws
to
20 to
24
inch-pounds.
SLIP RING ALIGNMENT
(MCCAULEV)
f.
Push
the
brushes
back
into
the brush
block
to
ensure
that
they
spring
back
freely.
If
a
chattering
or
screeching
noise is
heard
coming
from
the
brush/slip ring
area,
the
probable
cause
is
g.
If
the
brushes
bind,
loosen
the
screws
and
reposi-
improper
brush
block-to-slip
ring alignment.
A
tion the
brush
holder
so
that the
brushes ride
freely
in
screeching
or
chattering
detected while
turning
the
the slots.
Torque
the
screws
to
20
to
24
inch-pounds.
propeller
by
hand
tin
the
normal
direction
of
rotation)
h.
Install
the
brush
block
as
indicated
in
BRUSH
ShOUld be corrected
immediately.
If
the
chattering
or
BLOCK
INSTALLATION.
screeching
is heard above the
idling
engine
noise,
the
problem
is
severe.
Repositioning
the
brush block
as
indicated should
correct
the
problem.
Refer
to
Figure
I
BRUSH
BLOCK
REMOVAL
(MCCAULE~/3
11-se.
if
slip ring
wobble
is
the
problem,
attach
a
dial
indicator
to
the front of the
engine
and check
the
slip
a.
Disconnect the
lead wires
from the
terminal
strip.
b. Disconnect
the brush
block
mounting
screws
and
remove
the
brush
block
from
the
engine.
BRUSH
BLOCK
INSTALLATION
I
(MCCAULE’f3
(Figure
1
1-36)
a.
Install
the
brush block
on
the
engine
with the
two
screws
but do
not
tighten
the
screws.
MACHINE
EWXY AND SLIP
RING
b. Add
or remove
shims
to
the
mounting
washers
of
HOLDER
IN
AREAS SHOWN TO
OBTAIN
A
TOTAL UNDERCUT OF
.05(Y
TO
.Ob(T
the brush
block until
each
entire
brush
is in
contact
I
with its
slip ring
throughout
360"
of
rotation.
Refer
to
i
AFTER
MACHINING OF
SLIP RING
FACES
T
*35
.oso
c.
Position
the brush
block
on
the
mounting
bracket
´•oso
so
that
the
distance
between
the
brush
block
and
the
face of the
slip
ring
is
.064
.015
inch.
CAUTION
WHEN
UNDERCUTTING
INSULATION
BETWEEN
RINGS.
DO NOT
CUT
INSIDE
AND
OUTSIDE DVAMETERS OF
d.
Tighten
the
screws.
´•003~
PAST
THE
ORIGINAL
SLIP
RING
(MCCAULE’/3
The
mounting
bolts
cannot
be
retorqued
nor
can
shims be
added
to correct
wobble
or
nonconcentric
rotation
on
these
slip rings.
Wear
or
slight
wobble
may
I
be
removed
by
machining.
Figure
11-38.
Slip Ring Machining
(McCauley)
11-68
815