Cessna 150 Series Service Manual page 123

(2 x 4)
VERTICAL FIN
RUDDER
BLOCK
BLOCK RUDDER
HALF THE WIRE POINTER
-
DISTANCE BETWEEN
STRAIGHTEDGES
ESTABLISHING NEUTRAL MEASURING
POSITION OF RUDDER RUDDER
TRAVEL
1. Establish neutral position of rudder by clamping straightedge (such as wooden 2 X 4) on each side of
fin and rudder and blocking trailing edge of rudder half the distance between straightedges as shown.
2. Tape a length of soft wire to one elevator in such a manner that it can be bent to index with a point on
rudder trailing edge just above the lower rudder tip (rudder butt).
3. Using soft lead pencil, mark rudder at point corresponding to soft wire indexing point (neutral).
4. Remove straightedges.
5. Hold rudder against right, then left, rudder stop. Measure distance from pointer to pencil mark on
rudder in each direction of travel. Distance should be between 6.04" and 6.60".
Figure 10-4. Checking Rudder Travel
10-9. CABLES AND PULLEYS. (Refer to figure graph in this section, safety devises and reinstall
10-1.) all items removed in step "a".
10-10. REMOVAL AND INSTALLATION.
10-11. RIGGING. (Refer to figure 10-1.)
a. Remove seats, upholstery and access plates
a. Adjust travel stops (8) to attain travel specified
as necessary.
in Section 1. Figure 10-4 illustrates correct travel
b. Disconnect cable at rudder bar (10) and bellcrank and one method of checking.
(7). b. Disconnect nose wheel steering tubes (index 6,
c. Remove cable guards, pulleys and fairleads as figure 5-6) from nose strut.
necessary to work cables free of aircraft. c. Adjust cables at devises (5) to align rudder and
pedals in neutral position, 6.00 inches from firewall
NOTE
and pedal pivot shafts (index 4, figure 10-2). This
step automatically determines cable tension through
To ease routing of cables, a length of wire use of return springs (14).
may be attached to end of cable before being
withdrawn from aircraft. Leave wire in NOTE
place, routed through structure, attach cable
being installed and pull cable into position. Due to thickness of insulation on firewall, it
is recommended that a piece of 1/16 inch
d. After cable is routed in position, install pulleys welding rod be ground to a sharp point and
fairleads and cable guards. Ensure cable is posi- notched at the 6.00 inch dimension. Pierce
tioned in pulley groove before installing guard.
insulation on firewall and use notch to mea-
e. Rig system in accordance with applicable para- sure proper dimension.
10-6