Cessna T188C - Page 181

MODEL 188
& T188 SERIES
SERVICE
MANUAL
11-74. STARTER
MOTOR.
pit. The tailpipe
is welded to
the muffler. A
shroud
Is attached to
the left exhaust
stack to provide
heated
11-75. REMOVAL
AND INSTALLATION.
air for the
alternate induction air source.
a. Remove
engine cowling
in accordance
with para-
graph 11-3.
11-79. REMOVAL AND
INSTALLATION.
a. Remove engine cowling in accordance with para-
CAUTION
graph 11-3.
b. Disconnect
ducts from
heater shroud
on muffler
When disconnecting
starter electrical
cable,
assembly.
do not
permit terminal
bolt to rotate.
Ro-
c. Disconnect
duct from
carburetor heat
shroud on
tation of the bolt could break the conductor left exhaust stack assembly.
between bolt
and field
coils causing
the
starter
to be
inoperative.
NOTE
b.
Disconnect battery
cables and
insulate as a
On serials 188-0001
and ON,
if equipped with
safety
precaution.
SK182-78
kit,
the carburetor
heat shroud
is
c. Disconnect
electrical
cable at starter
motor.
attached
to the engine
mounts and
must be
d. Remove
nuts and
washers
securing
motor to
removed
before
removing
the exhaust
system.
starter adapter
and remove
motor. Refer
to engine
manufacturer's
overhaul
manual
for
adapter
removal.
d.
Remove
nuts, bolts
and
clamps
attaching
stack
e.
Reverse
the preceding
steps
for reinstallation.
assemblies
to
the muffler.
Install
a
new O-ring
seal on
motor,
then
install
motor.
e.
Loosen
nuts
attaching
exhaust
stacks
to
the
Be sure
motor
drive
engages
with
the
adapter
drive
cylinders
and
remove
muffler
assembly.
when
installing.
f.
Remove
nuts
attaching
exhaust
stack
assemblies
to the cylinders and remove exhaust stacks and gas-
11-76. PRIMARY
MAINTENANCE.
The starting
kets.
circuit
should
be inspected
at
regular
intervals,
the
g. Reverse
the
preceding
steps
for reinstallation.
frequency
of which
should
be determined
by the
Install
a
new copper-asbestos
gasket
between
each
amount
of
service
and
conditions
under
which
the
riser
and
its
mounting
pad on
each
cylinder,
regard-
equipment
is operated.
Inspect
the
battery
and
wir-
less
of
apparent
condition
of those
removed.
Torque
ing.
Check
battery
for
fully
charged
condition,
proper
exhaust
stack
nuts
at cylinders
to
100-110
pound-
electrolyte
level
with approved
water
and terminals
inches
for cleanliness.
Inspect
wiring to be sure
that all
connections
are clean
and tight and
that the
wiring
11-80.
INSPECTION.
Since
exhaust
systems
of this
insulation
is sound.
Check
that the
brushes
slide
type
are subject
to
burning,
cracking
and
general
freely
in their
holders
and
make
full
contact
on the
deterioration
from
alternate
thermal
stresses
and
commutator.
When
brushes
are
worn
to one-half
of
vibrations,
inspection
is
important
and
should
be
their
original
length,
install
new
brushes
(compare
accomplished
every
100 hours
of operation.
Also,
a
brushes
with
new
brushes).
Check
the commutator
thorough
inspection
of the
engine
exhaust
system
for
uneven
wear,
excessive
glazing
or evidence
of
should
be made
to detect
cracks
causing
leaks
which
excessive
arcing.
If the
commutator
is
only slightly
could
result
in loss
of engine
power.
To
inspect
the
dirty,
glazed
or
discolored,
it may
be
cleaned
with
a
engine
exhaust
system,
proceed
as follows:
strip
of
No. 00
or
No. 000
sandpaper.
If the
commu-
a. Remove
engine
cowling
as
required
so
that
ALL
tator
is rough
or
worn,
it should
be turned
in a
lathe
surfaces
of
the exhaust
assemblies
can be
visually
and the
mica
undercut.
Inspect
the
armature
shaft
inspected.
for rough
bearing surfaces.
New brushes
should be
properly seated when
installing by wrapping
a strip
NOTE
of No.
00 sandpaper
around
the commutator
(with
Especially
check
the areas
adjacent
to welds
sanding side
out) 1-1/4 to 1-1/2 times
maximum.
Drop
brushes on sandpaper covered
commutator and and
slip joints. Look for gas
deposits in sur-
turn armature slowly in the direction of normal rounding areas, indicating that exhaust gases
tation. Clean sanding dust from motor after sanding are escaping through a crack or hole or
operations.
around the
slip joints.
b. After
visual inspection,
an air leak
check should.
11-77. EXHAUST SYSTEM. be made on the exhaust system as follows:
1.
Attach the
pressure side
of an industrial
11-78. DESCRIPTION.
The exhaust system
consists vacuum cleaner
to the tailpipe opening, using
a rub-
of two exhaust
stack assemblies, for the
left and right ber plug
to effect a seal as required.
bank
of cylinders.
Each
cylinder
has
a riser
pipe
attached
to the exhaust port.
The three risers at each
NOTE
bank
of cylinders
are joined
together
into
a collector
pipe forming an
exhaust stack
assembly. The
center
The inside
of the vacuum cleaner
hose should
riser on each bank is detachable,
but the front and aft
be free of any contamination
that might be
risers are welded
to the collector
pipe.
Each exhaust
blown
into the engine
exhaust system.
stack assembly
connects to
the muffler beneath
the
engine. The
muffler is
enclosed in a shroud
which
captures
exhaust heat
which is used to
heat the cock-
Revision
1
11-25