Cessna 1969-1976 172 Series Service Manual page 144

10-3. TROUBLE SHOOTING (Cont).
PROBABLE CAUSE
Cables too tight.
Cables not riding properly
on pulleys.
Binding, broken o r defective
pulleys
or cable guards.
Pedal b a r s need lubrication.
Defective rudder bar bearings.
Defective rudder hinge bushings.
Clevis bolts too tight.
Steering rods improperly
adjusted.
TROUBLE
BINDING OR JUMPY MOVE-
MENT OF RUDDER PEDALS.
REMEDY
Refer to figure 10-2 for distance
between firewall and pedals. Rig
system in accordance with para-
graph 10- 11.
Open a c c e s s plates and check
visually. Route cables cor-
rectly over pulleys.
Open a c c e s s plates and check
visually. Replace defective
pulleys and install guards
properly.
Refer t o Section 2.
If lubrication fails to eliminate
binding. Replace bearing blocks.
Check visually. Replace defective
bushings.
Check and readjust bolts to
eliminate binding.
Rig system in accordance with
paragraph 10-
11.
LOST MOTION BETWEEN
RUDDER PEDALS AND
RUDDER.
INCORRECT RUDDER TRAVEL
x
Insufficient cable tension.
Refer to figure 10-2 for distance
between firewall and pedals. Rig
system i n accordance with para-
graph 10- 11.
Incorrect rigging.
Rig in accordance with paragraph
I
10-11.
10-4. RUDDER PEDAL ASSEMBLY. (Refer to fig-
u r e 10-2.)
10-5. REMOVAL AND INSTALLATION.
a.
Remove carpeting, shields and soundproofing
b. Disconnect master cylinders (12) a t pilot
c. Disconnect parking brake cables a t master cy-
d. Remove rudder pedals (2) and brake links (5).
e. Thru Aircraft Serial 17263809 and F17201324,
relieve cable tension
at turnbuckles (index 6, figure
10-1); beginning with Aircraft Serial 17263810 and
F17201325, relieve cable tension at clevises (index
11, figure 10-1).
f.
Disconnect cables, return springs and steering
tubes from rudder bars.
from pedal and tunnel a r e a s
as
necessary.
rudder pedals.
linders.
I
g. Remove bolts securing bearing blocks (8) and
work rudder b a r s out of tunnel a r e a .
NOTE
Rudder bar assemblies should be checked
for excessive wear before installation.
bearing blocks a r e nylon and require no
lubrication unless binding occurs. A few
drops of general purpose oil should eliminate
such binding.
The
h. Reverse preceding steps for installation. Rig
system in accordance with applicable paragraph in
this section.
applicable, and reinstall all items removed in step
Safety turnbuckles o r clevises, as
1 1 1 1 a .
10-2 Change 2