Cessna T188C - Page 145

MODEL 188 & T188 SERIES SERVICE MANUAL
9-3. TROUBLE SHOOTING (Cont).
TROUBLE
PROBABLE
CAUSE
REMEDY
TRIM INDICATOR FAILS Pointer incorrectly positioned Re-rig system in accordance
TO INDICATE CORRECT during rigging. with paragraph 9-12.
TRIM POSITION.
INCORRECT TAB
TRAVEL. Stop-blocks
loose or incorrectly
Rig system in accordance
adjusted on control cables, with paragraph 9- 12.
9-4. TRIM
TAB.
b. Disassemble
actuator assembly (1) as illustrated
in Detail A as follows:
9-5. REMOVAL
AND INSTALLATION. (See
1. Remove chain
guard (3) if not previously
re-
figure 9-1.) moved in step "d" of paragraph 9-7.
a. Disconnect push-pull tube (22) at horn assem- 2. Using suitable punch and hammer, remove
bly (21). groove pins (8)securing sprocket (5) to screw (9) and
remove sprocket from screw.
NOTE
3. Unscrew threaded
rod end (15) and remove
rod end from actuator.
If trim system is not moved and actuator 4. Remove groove pins(10)securing bearings
screw is not turned,
rigging of system
(6 and 14)
at the housing ends.
should not be necessary after installation 5. Lightly tap screw (9) in the opposite direc-
of tab. tion from sprocket end, remove bearing (14), O-ring
(13) and collar (7).
b. Drill out rivets
securing trim tab hinge to
ele- 6. Lightly tap
screw (9) toward the sprocket
vator and remove trim tab.
end of housing, remove bearing
(6) and collar (7).
7. It is not necessary to remove retaining rings
NOTE (11).
After tab has been removed and if hinge 9-9. CLEANING, INSPECTION AND REPAIR.
pin is to be removed,
it is necessary
to (See
figure 9-4.)
spread the crimped ends of the hinge a. DO NOT remove bearing (16) from threaded
before driving out pin. When a pin has rod end (15) unless replacement of bearing is neces-
been installed, crimp ends of hinge to sary.
prevent pin from working out.
b.
Clean all component parts,
except bearing (16),
by washing in Stoddard solvent or equivalent. Do not
c. Reverse
preceding steps for reinstallation.
Rig clean
sealed bearing (16).
system, if
necessary, in accordance with
paragraph c. Inspect
all component parts for obvious
indica-
9-16. tions of damage such as stripped threads, cracks,
deep
nicks
and
dents.
9-6. TRIM TAB
ACTUATOR.
d. Check bearings
(6 and 14), screw (9) and thread-
ed rod end (15) for excessive wear and scoring.
9-7. REMOVAL
AND INSTALLATION.
(See Dimensions
of the parts are as
follows:
figure 9-1.) BEARING (6)
a. Remove access plate from left side of tailcone INSIDE DIAMETER 0. 373" MIN.
and from lower side of right stabilizer. INSIDE DIAMETER 0. 374" MAX.
b. Remove safety
wire and
relieve cable
tension at
turnbuckle (17),
BEARING (14)
c. Disconnect push-pull tube (22) at actuator rod INSIDE DIAMETER
end (23). SMALL HOLE 0.248" MIN.
d.
Remove chain guard (25) and
disengage chain
SMALL HOLE
0. 249" MAX.
(27) from sprocket (26). LARGE HOLE 0.373" MIN.
e. Remove screws securing
clamps (28) and care-
LARGE HOLE
0. 374" MAX.
fully remove actuator (24) through access opening.
f. Reverse the preceding steps for reinstallation. THREADED ROD END (15)
Rig system in
accordance with paragraph
9-12,
OUTSIDE DIAMETER
safety turnbuckle and reinstall all items removed (SHANK) 0. 245" MIN.
for access. 0. 246" MAX.
SCREW
(9)
9-8. DISASSEMBLY.
(See figure 9-4.)
OUTSIDE
DIAMETER 0. 369"
MIN.
a. Remove actuator in accordance with paragraph 0.370" MAX.
9-7.
9-2