Piper Comanche PA-24 Service Manual page 258

G. Pulleys
Inspect pulleys for roughness, sharp edges, and presence of foreign material embedded in the
grooves. Examine pulley bearings to assure proper lubrication, smooth rotation, freedom from flat
spots, dirt, and paint spray. Periodically rotate pulleys, which turn through a small arc, to provide a
new bearing surface for the cable. Maintain pulley alignment to prevent the cable from riding on
flanges and chafing against guards, covers, or adjacent structure. Check all pulley brackets and
guards for damage, alignment, and security.
5-5. Control Column Assembly.
5-6. Removal Of Control Column Assembly. (Refer to Figure 5-5.)
A. To remove either of the control wheels (1 and 10) with tube (2), proceed as follows:
1. Measure the roller assembly (B) cable attachment fitting (20) and collars fore (21) and aft (22)
in reference to their positions around the control wheel tube.
2. Cut the wire (16) that safeties the cap bolts (17) that secure the roller assembly and collars to
the control tube. Remove the cap bolts.
3. Slide the control tube from the roller assembly, cable attachment fitting and collars and draw
the tube from the instrument panel. Note the number of seal washers (18) between the cable
fitting and collars.
B. The square tube (3) assembly may be removed by the following procedure:
1. Disconnect one turnbuckle (6) of the horizontal control chains (5 and 7) and unwrap chain.
2. Separate the vertical control chain (13) from the aileron control cables by disconnecting one of
the connecting turnbuckle sand unwrap chain from sprocket.
3. From the horizontal brace between the left and right sprocket brackets (4 and 8), remove three
cap bolts and loosen the fourth lowering the brace slightly to allow withdrawal of the sprocket
bracket.
4. Remove bolts and screw holding the sprocket bracket to the bulkhead.
5. Withdraw the square tube assembly.
NOTE: If an Autopilot roll servo is installed in the forward end of the square tube shaft
forward of the bulkhead, it must be removed from the shaft prior to withdrawing the
square tube.
C. The square tube assembly may be removed from the sprocket assembly by the following procedure:
1. Remove the bulkhead seal, nut and washer (31) from the shaft at the sprocket bracket.
2. Remove hex nut, washer and bolt (12) from the shaft and sprocket axle (36). Use a Kaynar
wrench (P/N W10-3) to remove the nut.
3. Remove the square tube with shaft from the sprocket assembly, taking care that the sprocket
and washers do not fall.
D. If the sprocket assembly housing is not to be removed, the roller assembly may be removed from
the square tube at the guide or aft end by the following procedure:
1. Cut the safety wire (16) holding the nylon rub blocks (23) used as guides and remove the
blocks. Nylon blocks are secured by attaching screws.
2. Slide the roller assembly from the square tube.
V - SURFACE CONTROLS
PIPER COMANCHE SERVICE MANUAL
1F22
04/01/09