Cessna T188C - Propeller Control; Starting System

MODEL 188
& T188 SERIES
SERVICE
MANUAL
1. Disconnect mixture control (22) rod end from i. Loosen clamp-bolt at bellcrank (36), straighten
arm
(16).
control
wire and slide wire from
clamp-bolt.
2. In the cockpit, push mixture control IN, un- j. In the cockpit, using care not to lose ball bear-
lock and pull control OUT approximately 1/8-inch ing from the control at instrument panel, unlock and
for cushion. pull control OUT until wire is out-of-sight inside
3. Be
sure control
(21) is attached
to the bracket
housing at
the engine end
of control. Cut
the housing
(26) properly
and safety
wire/retainer
is installed.
off as required
to allow bellcrank
to attain
full travel
4. Place control arm (16) against the FULL RICH and reinstall wire in clamp-bolt. Bend wire to a 90
°
stop, adjust mixture
control (22) rod end
to align with angle as
a safety precaution.
arm
and install attaching bolt and
washers. k.
Check operation of air door in
both directions
5. Unlock and pull mixture control OUT and making sure the control in the cockpit does not pull
check that control
arm (16) is against IDLE
CUT-OFF out more
than 3 inches maximum.
stop.
6. Check that sufficient threads are engaged in NOTE
mixture
control (22)
rod end and tighten
jam nut.
The
result of rigging,
in all
cases, is
the
NOTE
alternate
air door (45)
must be fully
OPEN when
the control
in the
cockpit
Refer to the inspection chart in Section 2 is pulled out a maximum of 3 inches, that
for inspection,
lubrication and/or replace-
the door
is fully CLOSED when the control
is
ment interval for the mixture control. pushed in and that no binding of the system
is experienced,
11A-66. PROPELLER
CONTROL.
Refer
to Section
13.
* Refer
to the inspection chart in Section
2
for
inspection,
lubrication and/or
replace-
11A-67.
ALTERNATE AIR CONTROL.
(BEGINNING
ment interval for the alternate
air control.
WITH
AIRCRAFT
SERIAL 18800833
) (See
figure 11A-6.
sheet 5 )
11A-68.
STARTING
SYSTEM.
Refer to Section
11.
NOTE
11A-69.
EXHAUST
SYSTEM.
Cowling
must
be properly
installed
prior
11A-70.
DESCRIPTION.
The exhaust
system
con-
to rigging
of alternate
air
control.
sists of
two exhaust
stack assemblies,
for the left
and
right bank of cylinders.
Each
cylinder has
a
a.
Loosen
jam nuts
at both
ends of
rod assembly
riser
pipe attached
to
the exhaust
port.
The
three
(42).
risers at
each bank
of cylinders
are joined
together
b. Disconnect ball
joint (43) from ball on arm
into a collector pipe
forming an exhaust stack assem-
assembly
(44).
bly. The
center riser
on each
bank is
detachable,
c. Adjust
ball joint
(43) on
rod assembly
(42) until
but the front
and aft
risers are
welded to
the collector
sufficient
threads
are engaged.
pipe.
Each exhaust
stack
assembly
connects to
the
d.
Screw
rod (42)
into rod
end
(38) to obtain
approxi-
muffler
beneath
the
engine.
The muffler
is
enclosed
mately
8.65 inches
between
center
of ball socket
and
in a shroud
which
captures exhaust
heat
which is
used
center of
rod end.
to heat the
cockpit. The
tailpipe is welded
to the
e. Connect
ball
joint (43)
to ball on
arm assembly
muffler.
(44) and tighten jam nuts.
f.
In the cockpit. push alternate
air control full 11A-71.
REMOVAL AND INSTALLATION.
IN and check that alternate air
door (45) is fully
a. Remove engine cowling in accordance
with para-
closed.
graph
11A-3.
g. If door (45) is NOT fully closed, loosen clamps b. Disconnect ducts from heater shroud on muffler
securing
control
(37)
to engine
mount
(39) and
support
assembly.
assembly
(41) and slide control through
clamps until c. Remove
nuts, bolts and clamps
attaching stack
door is fully closed.
Tighten clamps,
assemblies
to the muffler.
h. In the cockpit,
unlock alternate air control,
pull d. Loosen nuts
attaching exhaust stacks to
the
control full OUT (approximately
3 inches) and check
cylinders and remove
muffler assembly.
that alternate air
door (45) is fully open.
e. Remove nuts attaching
exhaust stack assemblies
to the cylinders
and remove
exhaust stacks
and gas-
NOTE
kets.
f.
Reverse
the
preceding
steps
for reinstallation.
After completion of step "h"
the alternate Install
a new copper-asbestos
gasket between each
air control
should be properly
rigged,
riser
and its mounting
pad on each
cylinder,
regard-
however, in come cases, it
may become less
of apparent condition of those
removed. Torque
necessary
to shorten the
control housing
exhaust stack
nuts at cylinders
to 100-110
pound-
in
order
for
the
bellcrank
(36)
to
reach
inches.
full travel. If so, proceed to step "i".
11A-29