Piper Navajo PA-31 Service Manual page 199

PIPER NAVAJO SERVICE MANUAL
b. The aileron chain sprocket assembly may be assembled and installed by the following procedure:
1. Press the sprocket shaft bushings (57) in the sprocket housing (37 or 61).
2.
Position the sprocket (46 or 50) in the housing, spacer bushing (66) (right only) and slide
the stud (64) in place. Insert bolt (63) through the sprocket and stud; install nut (65) and tighten to a
standard torque. Use Kaynar wrench, P/N W10-3.
Kaynar Mfg. Co. Inc.
800 S. State College Blvd.
Fullerton, California
3. Install the stud washers (59) and nut (58) and tighten enough to allow the sprocket to
rotate free with no end play.
NOTE
The left sprocket must be placed in its housing to allow the
sprocket to rotate 1800 from stop to stop.
4. Attach the sprocket assembly to the bulkhead and torque.
5. Position the horizontal roller chain (40 and 42) around the right and left sprocket and
temporarily connect turnbuckles. Check chain tension and correct position after both control wheels are
installed.
6.
If the left sprocket assembly was removed, wrap the vertical chain around the sprocket and
connect the chain to the control cable end. Ascertain that when the sprocket is centered between stops. the
roller chain is centered. Set elevator cable tension and safety turnbuckle.
c. The square tube (31) assembly may be assembled and installed by the following procedure:
1. Slide the square tube (31) in the roller housing (23).
2. Install the rollers (69) and washer (68) on the roller housing and adjust with the use of the
eccentric bushings in each roller to allow .002 of an inch clearance between the square tube on one roller and
.000 clearance on the opposite roller. Finish by installing angles (71) shimmed with spacer washers (70) as
required and tighten bolt assemblies to a standard torque. Recheck clearance between rollers and square tube
and lubricate the rollers.
3. Install the bearing housing (22) with bearings (74) on the roller housing. Install collar (21)
and cap bolts (67). Rotate the collar tight against the bearing housing; tighten cap bolts and safety.
4. Ascertain that the four nylon guides (75) are installed and safetied.
5. Slide the collar (34) on the forward end of the square tube.
6. Place the square tube assembly in position and connect it to the flexible joint (36) of the
sprocket assembly. Install bolt assembly and secure.
d. Attach the control tube guide block (47) to the front side of the instrument panel. Tighten the
two top attachment screws and leave the two bottom screws (48) loose until the final adjustment is made.
e. To install the control wheel, the following procedure may be used:
1. Slide the tube guide cover (49) on the control tube and insert the tube through the
instrument panel.
2. Place the ring (26) over the end of the control tube and slide the end of the tube over the
end of the roller fitting. Install cap bolt (25); torque and safety.
3.
Check that when the left sprocket (50) is centered between its stops, the control wheel will
also be centered If the control wheel does not center, it may be necessary to remove the cap bolts (25) and
rotate the control tube (44) on the roller housing (23) or remove the bolt (35) that joins the square tube
(31) and flexible joint (36), and rotate the tube 180° . Reinstall bolts; torque and safety.
Reissued: 10/12/79
SURFACE CONTROLS
117