d. Install the axle and spacer into the wheel assembly and install the wheel into the fork of the strut assembly,
Secure in place with an axle plug on each end, axle rod, washers and self-locking nuts. Tighten the nuts until no
side play is felt, yet allowing the wheel to rotate freely.
e. Turn fairing so it will fall into place and install it with the four bolts and screws in the small plate.
7-25 REMOVAL AND DISASSEMBLY OF MAIN WHEEL. (Refer to Figure 7-8.)
a. Place the airplane on jacks. (Refer to Jacking, Section 11.)
b. If wheel fairing is installed, remove attaching screws, bolt and remove the fairing.
c. To remove the main wheel, remove the four cap bolts that join the brake cylinder housing and the lining
back plate assemblies. Remove the back plate from between brake disc and wheel.
d. Remove the dust cover and the cotter pin that safeties the wheel nut, remove the wheel nut and slide the
wheel from the axle.
remove the wheel through bolts (16). Pull the wheel halves from the tire by removing the inner half (8) from the
tire first,and then the other half.
f. The wheel bearing assemblies may be removed from each wheel half by first removing the snap rings
(1 or 14) that secure the grease seal retainers (2 or 13), and then the retainers, grease seals (4 or 11) and bearing
cones (6 or 10). The bearing cups (5 or 9) should not be removed (except for replacement). They may be
removed by tapping out evenly from the inside.
7-26. INSPECTION OF MAIN WHEEL ASSEMBLY. The inspection of the main wheel is the same as that
given for the nose wheel, paragraph 7-22.
7-27. ASSEMBLY AND INSTALLATION OF MAIN WHEEL. (Refer to Figure 7-8.)
outer wheel half (7) and then join the two wheel halves. Position the brake disc (15) in the inner wheel half and
install the through bolts with the nuts on the valve stem side. Torque wheel nuts to 150 inch-pounds.
b. Position the tire and tube so the index mark on the tire is aligned with the index mark on the tube. This
(2 or 13) and felt rings (3 or 12). Secure with snap rings (l or 14).
d. Slide the wheel on the axle and secure with retainer nut. Tighten the nut to allow no side play, yet allow
the wheel to rotate freely. Safety the nut with a cotter pin and install a dust cover.
e. Position the brake lining back plates between the wheel and brake disc and the brake cylinder on the torque
plate. Install the four bolts to secure the assembly. If the brake line was disconnected, reconnect the line and
bleed the brakes.
f. Position the wheel fairing and secure it with attaching screws, bolt and remove airplane from jacks.
7-28. BRAKE SYSTEM.
7-29. WHEEL BRAKE ASSEMBLY.
7-30. BRAKE ADJUSTMENT AND LINING TOLERANCE. No adjustment of the brake lining clearance is
necessary as they are self-adjusting. Inspection of the lining is necessary, and it may be inspected visually while
installed on the airplane. The linings are of the riveted type and should be replaced if the thickness of any one
segment becomes worn below 0.099 of an inch or unevenly worn.
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
LANDING GEAR AND BRAKE SYSTEM
1I11