Control Column Assembly - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
5-5. CONTROL COLUMN ASSEMBLY.
5-6. REMOVAL OF CONTROL COLUMN ASSEMBLY. (Refer to Figure 5-1.)
a. To remove either control wheel (43) with tube (27 or 44), proceed as follows:
1. Mark the control tube (27 or 44), ring (26) and collar (21) in relation to location around the
roller fitting (23). Note the installed position of link assemblies (30) for reinstallation. If link assemblies are
not installed in the same position control friction may increase.
2. Cut safety wire (24) from the cap bolts (25) which secure the control tube (27 or 44) and
ring (26) to the roller fitting (23). Remove bolts from the fitting.
3. Slide the control tube from the roller fitting and ring, and draw the tube from the
instrument panel. Do not allow the square tube (31) assembly to fall.
b. The square tube (31) assembly may be removed and disassembled by the following procedure:
1. Remove the cotter pins (33) and bolt assemblies (32) that join the links (30) with the
control arm (11 and 13 or 16 and 18).
2. Remove the bolt assembly (35) that joins the forward end of the square tube (31) with the
flexible joint (36) of the sprocket assembly. Remove the square tube assembly from behind the instrument
panel.
3.
The square tube assembly may be disassembled by first removing the collar (34) from the
tube (31). Draw the tube from the roller fitting (23).
4.
Cut the wire (24) that safeties the cap bolts (67) that secure the collar (21) to the roller
fitting (23). Remove the bearing housing (22) from the fitting.
5. Disassemble the rollers (69) from the fitting. Note the number and location of the spacer
washers (70).
c. The sprocket assembly may be removed from the bulkhead and disassembled by the following
procedure:
1. Disconnect one of the two turnbuckles (41) that connect the horizontal roller chains (40
and 42). Remove the outboard chain guard (56) from the inside of the sprocket housing (37 or 61) that is
to be removed. Unwrap the chain from the sprocket that is to be removed.
2. If the left sprocket assembly (61) is to be removed, first remove the floor panel located
between the control pedestal and left side of the fuselage. Loosen one of the aileron cable turnbuckles at
fuselage station 76.00 to relieve tension from the vertical roller chain (52). Disconnect one end of the chain
where it attaches to the control cable and unwrap the chain from the sprocket.
3. Remove the cap bolts (39) that attach the sprocket housing to the bulkhead and remove the
housing.
4. To disassemble the sprocket assembly, remove the bolt that secures the sprocket to the
sprocket stud (64). Use a Kaynar wrench (P/N W10-3) to remove the hex nut.
Kaynar Mfg. Co. Inc.,
800 S. State College Blvd.
Fullerton, California
5. Remove nut (58) and slide stud (64) from sprocket housing.
d. To remove the torque tube (14) assembly, use the following procedure:
1.
With the floor panel removed from between the control pedestal and the left fuselage side
panel and the links (30) disconnected from between the control tube housing (22) and the torque tube
arms (11,13,16 and 18), loosen one of the elevator control cable turnbuckles at fuselage station 86.50
enough to relieve cable tension.
2. Remove the bolt and roll pins (12,17 and 82).
3. Disconnect bolt and roll pins (10) and remove elevator control sector (8) by pushing
extensions assembly in torque tube (14).
4. Push the right extension tube inside torque tube (14) and remove the torque tube.
5. The bearings may be removed if desired.
e. The control tube guide located on the instrument panel may be removed by removing the
assembly cover (49) and the screws that secure the housing (47).
Reissued: 9/23/80
1H21
SURFACE CONTROLS