Cessna T188C - Page 112

MODEL
188 &
T188 SERIES
SERVICE MANUAL
5-24.
DISASSEMBLY
AND REASSEMBLY
OF
TAIL
force. A minimum
of four springs
are used.
WHEEL ASSEMBLY. (See figure 5-7.) o. On the 10-inch tailwheel assemblies from serial
Figure 5-7 may be used as a guide during disassembly 18800573 thru 18800618, torque nut to 7 lb. ±1 lb.
replacement
of parts and
reassembly
of the
tail wheel,
break-away
force.
p. On
the 10-inch tailwheel
assemblies,
from serial
NOTE
18800619 thru
18802745, locate springs
left and right,
opposite
each other
and torque
nut to 8 lb. ±2
lb.
The
bearing cups are
a press fit in the wheel
break-away
force.
halves
and should not be removed
unless re- q. On the
10-lnch tailwheel assemblies,
beginning
placement
is necessary.
To
remove
bearing
with
serial 18802746,
when
assembly
operations
on
cups, heat wheel
halves in
boiling water for
15 tailwheel
assembly
is completed,
torque nut before
minutes.
Using
an arbor
press,
if available,
lubrication
to
attain
approximately
12 to 15
lb. pull
press out
bearing cup and
press in new
one at
tailwheel steering
cable attach
point on steering
while wheel
is still
hot.
arm
assembly.
It may be
necessary
to use
washers
(P/N S1450-9S14-012), available from the Cessna
a. After removal,
deflate tire
by removing
valve Supply
Division,
as required, to
attain 12 to 15
lb.
core.
pull.
Refer to paragraph 5-26 for adjustment
of the
b. Grease
seals, retainers,
and
bearing cones
need
anti-shimmy
mechanism.
not be removed
to replace
a tire, although
their re-
moval for cleaning, inspection,
and lubrication
is
NOTE
recommended.
c. Remove bolts fastening
wheel halves together,
The six friction adjustment
springs must not
then separate wheel
halves, removing tire, tube,
and engage the
friction plate assembly.
gasket
between
wheel
halves.
a. Clean all metal
parts and
grease seal felts
in r.
Inflate tire to
seat beads, then
adjust to correct
solvent and
dry thoroughly.
pressure,
specified in figure
1-1 of this
manual.
e. Inspect
wheel halves
for cracks. Cracked
wheel
halves
must be replaced.
Sand out
nicks, gouges,
5-25.
INSTALLATION
OF TAIL
WHEEL.
and corroded areas. Where protective coating has a. Make sure spacers, washers, and lockwashers
been removed, area should
be cleaned, primed, and
are in place as tailwheel is positioned
in fork, then
painted. install axle bolt.
f. Replace
felt seals if
after normal
cleaning
b. Tighten
axle nut until
a slight bearing
drag is
they are embedded with foreign matter, the felt is obvious as wheel is turned. Back off nut to the near-
not pliable, or the material is broken or does not re- est castellatlon and install cotter pin.
tain shape necessary for proper sealing. Oil felts c. Lubricate tailwheel at grease fitting.
lightly at installation.
d. Remove padded stand placed
under tailcone.
g. Bearing cups and cones should be repacked if
damaged
or discolored. After cleaning,
repack 5-26. ADJUSTMENT
OF ANTI-SHIMMY
MECHANISM.
bearing cones before installation. (See figure 5-7.)
h. Place
tube in tire.
Position wheel
halves in
tire,
with gasket in place,
so that valve stem and
NOTE
bolt holes are properly aligned.
i.
Hold wheel halves together,
making sure that
Prior to adjusting anti-shimmy
mechanism,
tube is not
pinched, and install and tighten
the bolts check
torque on spindle nut for a reading
of
evenly.
12 to 15 lbs.
when measured at the tailwheel
NOTE
steering cable
attach point. Failure to
do so
could
result in bearing
failures
and improper
During
reassembly,
torque bolt on
tailwheel
friction
setting of
anti-shimmy
mechanism.
assembly until
gear has
the following
break-
away
force, and measured
at the cable
attach
Adjustment
of the anti-shimmy
mechanism
on the 10"
hole.
tailwheel assembly
is to be
accomplished
by turning
the six setscrews clockwise, maintaining approxi-
j.
On the 8-inch
tailwheel
assemblies
thru
serial
mately
equal
number of
turns for
each screw
until
18800572,
torque bolt
to 10 lb. ±1 lb.
breakaway force.
a friction
level of 16
lb. ±1 lb. is
reached when
k. On
the 8-inch
tailwheel
assemblies
from
serial
measured
by the
use of
a stick-force
gauge or
fish
18800573 thru 18800618, torque
bolt to 7 lb. ±1 lb.
scale at the tallwheel steering
cable attach point on
1.
On
the 8-inch
tailwheel
assemblies
from
serial
the
tailwheel
steering
arm.
18800619 thru 18802745, torque bolt to 8 lb. ±2 lb.
m. On the
8-inch tailwheel
assemblies from
serial
5-27. TAIL WHEEL
BALANCING.
Refer to
para-
18800670 thru
18801034,
install (2)
#3233 Scott
springs
graph 5-17
of this manual.
diametrically
opposed to each
other to obtain
8 lb ±2
lb break-away force.
5-28. TAIL WHEEL LOCK
SYSTEM. (See figure
n.
On the 10-inch
tailwheel
assemblies
thru serials
5-7, sheet
3 of 3 and
figure 5-8.)
18800572,
torque
bolt
to 15
lb. ±1
lb. break-away
force.
Beginning
with serial 18800517,
friction
5-29.
DESCRIPTION.
The steerable
tail wheel in-
springs are installed
to obtain
desired break-away
corporates
a manual
anti-swivel locking
system which
5-30 Revision 1