Cessna 150 Series Service Manual page 111

8-3. TROUBLE SHOOTING (Cont).
TROUBLE PROBABLE CAUSE
REMEDY
LOST MOTION BETWEEN Cable tension too low.
Adjust tension.
CONTROL WHEEL AND
TRIM TAB. Broken pulley. Replace defective pulley.
Cables not in place on pulleys.
Install cables correctly.
Worn trim tab actuator. Remove and replace worn actuator.
Actuator attachment loose. Tighten.
TRIM INDICATOR FAILS TO
Indicator incorrectly engaged Reset indicator.
INDICATE CORRECT TRIM on wheel track.
POSITION.
INCORRECT TRIM TAB TRAVEL Stop blocks loose or Adjust stop blocks on cables.
incorrectly adjusted.
9-4.
TRIM TAB. (Refer to figure 8-2.) c. Disconnect push-pull tube (12) from actuator
(9).
9-5. REMOVAL AND INSTALLATION. d.
Remove access plate from underside of right
a. Disconnect push-pull tube (2) from horn assem- hand stabilizer beneath actuator.
bly (3). e. Remove chain guard (8) and disengage chain
b. Drill out rivets attaching hinge to elevator. (8A) from actuator sprocket.
f. Remove screws (8B) and spacers (10) attaching
NOTE
actuator clamps to stabilizer structure (11) and care-
fully work actuator out through access opening.
After tab has been removed and if hinge pin g. Reverse the preceding steps for reinstallation.
is to be removed, it is necessary to spread Rig trim system in accordance with paragraph 9-12,
the crimped ends of the hinge before driving
safety turnbuckle (15) and reinstall all items removed
out pin. When a pin has been installed,
for access.
crimp ends of hinge to prevent pin from work-
ing out.
9-8. DISASSEMBLY. (Refer to figure 9-2.)
a. Remove actuator in accordance with paragraph
c.
Reverse preceding steps for installation. 9-7.
b.
Disassemble actuator assembly (1) as illustrated
9-6. TRIM TAB ACTUATOR. in Detail A as follows:
1. Remove chain guard (3) if not previously re-
9-7. REMOVAL AND INSTALLATION.
(Refer to moved in step "e" of paragraph 9-7.
figure 9-1.)
2.
Using suitable punch and hammer, remove
groov-pins (8) securing sprocket (5) to screw (9) and
CAUTION remove sprocket from screw.
3.
Unscrew threaded rod end (15) and remove
Position a support stand under tail tie-down rod end from actuator.
ring to prevent tailcone from dropping while 4. Remove groov-pins (10) securing bearings (6
working inside. and 14) at the housing ends.
5. Lightly tap screw (9) toward the sprocket
a. Remove baggage compartment aft wall for ac-
end of housing, remove bearing (6) and collar (7).
cess. 6.
Lightly tap screw (9) in the opposite direc-
b. Remove safety wire and relieve cable tension
tion from sprocket end, remove bearing (14), O-ring
at turnbuckle (15). (13) and collar (7).
9-2