Cessna 150 Series Service Manual page 104

SECTION 8
ELEVATOR CONTROL SYSTEM
TABLE OF CONTENTS
Page
ELEVATOR CONTROL SYSTEM ...... 8-1 Forward ..............
8-2
Description ..............
8-1 Removal and Installation ...... 8-2
Trouble Shooting ............
8-1 Rear .............. . 8-2
Elevators
.............. 8-2 Removal and Installation ...... 8-2
Removal and Installation ....... 8-2 Cables and Pulleys ........... 8-2
Repair ............... 8-2 Removal and Installation ....... 8-2
Bellcranks ............... 8-2 Rigging ................
8-6
8-1. ELEVATOR CONTROL SYSTEM. The rear bellcrank serves as an interconnect between
the elevators and a bearing point for the travel stop
8-2. DESCRIPTION. The elevators are operated bolts. An elevator trim tab is installed on the right
by power transmitted from the control wheels through elevator and is described in Section 9.
a series of cables, bellcranks and a push-pull tube.
8-3. TROUBLE SHOOTING.
NOTE
Due to remedy procedures in the following trouble shooting
chart it may be necessary to re-rig system, refer to para-
graph 8-14.
TROUBLE PROBABLE CAUSE
REMEDY
NO RESPONSE TO CONTROL Forward or aft end of push-pull
Attach push-pull tube correctly.
WHEEL FORE-AND-AFT tube disconnected.
MOVEMENT.
Cables disconnected.
Attach cables and rig system in
accordance with paragraph 8-14.
BINDING OR JUMPY MOTION Defective forward or rear
Replace bellcrank.
FELT IN MOVEMENT OF ELE- bellcrank pivot bearing.
VATOR SYSTEM.
Cables slack.
Adjust to tension specified in
figure 8-1.
Cables not riding correctly on
Route cables correctly over
pulleys. pulleys.
Nylon grommet on instrument Replace grommet.
panel binding.
Defective control "y" pivot
Replace bearing.
bearing.
Defective elevator hinges Replace defective hinges.
or lubrication needed. Lubricate per Section 2.
Clevis bolts too tight. Readjust to eliminate
bolt binding.
Lubrication needed.
Lubricate piano hinges.
Defective pulleys or cable Replace defective parts and
guards. install guards properly.
8-1