PIPER COMANCHE SERVICE MANUAL c. The square Nbe 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. wwer and bolt (12) from the shaft and sprocket axle (36). Use a Kaynar wrtnch (PIN WIG-3)to remove the nut. 3. Remove the square tube with shaft from the sprocket uaembly takinc care that the sprocket and washers do not faU. d. If the sprocket assembly housinJ is not to be removed. the roller assembly may be removed from the square Nbe at the guide or aft end by the followin, procedure: 1. Cut the safety wire (16) holdi ..
the Dylon rub blocks (23) used u pides and remove the blocks. Nylon blocks art secured by anachinJ screws. 2. Slide the roller usanbly from the square tube. a. When installing the control column assembly. fint install the components of the square tube assembly. If the nylon rub blocks (23) have been removed. install and tiBhten than on their anaching screws and secure in place with safety wire. Washers (25), Pan No. 81342·78 may be installed as required under the nylon rub blocks (23) to remove play betWeen the square tube (3) and control tube (2) without restricting control tube movement over !quare tube. 5·7. Installation Of Conarol Column Allembly. (Refer to Figure 5-1.) b.
If both the sprocket assembly and roller URmbly have been removed. the roller assembly may be replaced over the forward end of the square tube shaft. Adjust with spacer washers and rotate the eccentric bushing (37) to maintain 0.003 of an inch clearance betWeen one roller (15) and the tube (3) with the opposite roller in contact with the tube. Adjust c:leannce of the other let of rollers. c. To avoid unnecessary disassembly of control tube when chcckm, end play of the collars (21 and 22) and cable attachment fittinc (20), pre-assemble to obtain clearances required between the cable attachment fitting and the fore and aft collus. Prc-asscmbleu folio .. : 1. Slide the aft collar (22).
cable attachment limn, (20). forward collar (21), and roller assembly onto the control tube (2). 2. Temporarily insert forward coUarand roller assembly anachinc bolts (17). 3. Move the aft collar until the collars and fittinJ contact. then withdraw the aft collar until the fust of iu staaered holes align with the holes in the control tube. 4. Instill bolts (17) in aft collar. S. Check clearances between either collar and cable at1aChment littinl. Note the required seal washers (18) that will be equal on each side of the cable attachment flai ... to maintain a clearance of 0.003 to 0.013 of an inch. 6. Draw line from roller bearing housinJ aero.
collan and cable attachment fittillJ to control tube to mark their relative positions. 7. Remove the bolts. roUer UlCmbly. callan and cable titti. from the control tube and continue with step d. d. To install the square tube with sprocket usembly. proceed as follows: 1. Position sprocket (26 or 27) in sprocket brackets (4 or 8) and place wuher (38) on square tube shaft (3). 2. Slide squarc tube shaft into sprocket bracket and sprocket. Attach sprocket with bolt. washer and hex. nut (12) usin, KayDar wrench (PIN Wl().3). SURFACE CONTROLS ISSUED: 1!1ln2 I FIB