Piper COMANCHE PA-24-180 Service Manual page 138

PIPER COMANCHE SERVICE MANUAL
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 Kayna
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.
5-7. Intallation Of Control Column Assembly. (Refer to Figure 5-1.)
a. When installing the control column assembly, first install the components of the square tube
assembly. If the nylon rub blocks (23) have been removed, install and tighten them on their attaching
screws and secure in place with safety wire. Washes (25), Part 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 square tube.
b.
If both the sprocket assembly and roller assembly have been removed, the roller assembly may be
replaced over the forward end of the square tube shaft. Adjust with spacer wsher 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 clearance of the other set of rollers.
c.
To avoid unnecesary disassembly of control tube when checking end play of the collars (21 and
22) and cable attachment fitting (20), pre-assemble to obtain clearances required between the cable
attachment fitting and the fore and aft collars. Pre-ssemble as follows:
1. Slide the aft collar (22), cable attachment fitting (20), forward collar (21), and roller assembly
onto the control tube (2).
2. Temporarily insert forwrd collar and roller assembly attaching bolts (17).
3.
Move the aft collar until the collars and fitting contact, then withdraw the aft collar until the
first of its staggered holes align with the holes in the control tube.
4.
Install bolts (17) in aft collar.
5.
Check clearances between either collar and cable attachment fiting. Note the required seal
washers (18) that will be equal on each side of the cable attachment fitting to maintain a clearance of 0.003
to 0.013 of an inch.
6.
Draw line from roller bearing housing across collars and cable attachment fitting to control
tube to mark their relative positions.
7.
Remove the bolts, roller assembly, collars and cable fitting from the control tube and
continue with step d.
d. To install the square tube with sprocket assembly, proceed as follows:
1.
Position sprocket (26 or 27) in sprocket brackets (4 or 8) and place washer (38) on square
tube shaft (3).
2.
Slide square tube shaft into sprocket bracket and sprocket. Attach sprocket with bolt, washer
and hex nut (12) using Kaynar wrench (P/N W10-3).
SURFACE CONTROLS
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