Cessna 150K - Page 76

LANDING GEAR WHEEL THRU -BOLT NUT AND CAPSCREW TORQUE VALUES
MAIN
NOSE
WHEEL NUMBER
SIZE
MANUFACTURER
NUT /CAPSCREW
WHEEL HALF/
GEAR GEAR
TORQUE
FLANGE
X C
163001-0103
6.00 X 6
CLEVELAND
1501b-in
MAGNESIUM
X
C163001-0104
6.00 X 6 CLEVELAND
90 lb-in
ALUMINUM
X
C
163002 -0101
6.00 X 6 MC CAULEY
90-100Ib-in
ALUMINUM
X
C
163003 -0101 6.00 X 6 MC CAULEY *190-200 lb-in
STEEL
I
X C 163002 -0201
5.00 X 5 MC CAULEY
90-100 lb-in
ALUMINUM
X
1241156-12
5.00 X 5 CLEVELAND
90 lb-in
MAGNESIUM
X
C
163003 -0201
5.00 X 5
MC CAULEY
90-100 lb-in
STEEL
X
Cl63003 -0401
5.00 X 5
MC CAULEY *190-200 lb-in
STEEL
I·capscrew
Figure 5-2A. Main and Nose Wheel Thru-Bolt Nut and Capscrew Torque Values
5-16. MAIN WHEEL INSPECTION AND REPAIR
(McCauley Wheel).
ao Clean all metal parts, grease seal felts, and
mylar spacers in cleaning solvent and dry thoroughly.
b. Inspect wheel flanges, and wheel hub for cracks.
Cracked wheel flanges or hub shall be discarded and
new parts installed. Sand out smooth nicks, gouges,
and corroded areas. When the protective coating has
been removed, the area should he cleaned thoroughly,
primed with zinc chromate and painted with aluminum
lacquer.
c. If exceSSively warped or scored, or worn to a
thickness of 0.190-inch, brake disc should be re-
placed with a new part. Sand smooth small nicks
and scratches.
d. Carefully inspect bearing cones and cups for
damage and discoloration. After cleaning, pack
bearing cones with clean aircraft wheel bearing
grease (Section 2) before installing in wheel hUb.
1
5-17. MAIN WHEEL REASSEMBLY (McCauley
Wheel - Aluminum Flange).
a. Place wheel hub in tire and tube with tube in-
flation stem in cutout of wheel hub.
b. Place spacer and wheel flange on inboard side
of wheel hub (opposite of tube inflation stem), then
with washer under head of thru-bolt, insert bolt
thru brake disc, wheel flange, and wheel hub.
c. Place spacer and wheel flange on outboard side
of wheel hub with valve inflation stem through cutout
in wheel flange.
d. Install washers and nuts on thru-bolts.
5 -8B Change 3
ICAUTION\ I
Be sure that spacers and wheel flanges
are seated on flange of wheel hub. Un-
even or improper torque of thru-bolt
nuts can cause failure of bolts, with re-
sultant wheel failure.
e. Tighten thru-bolt nuts evenly and torque to the
value stipulated in figure 5-2A.
f. Clean and pack bearing cones with clean aircraft
wheel bearing grease. (Refer to Section 2. )
g. Assemble bearing cones, grease seal felts, and
retainers into wheel hub.
h. Inflate tire to seat tire beads, then adjust to
correct tire pressure. See figure 1-1 for correct
tire pressure.
5-l7A. MAIN WHEEL REASSEMBLY (McCauley
Wheel - Steel Flange).
a. Place wheel hub in tire and tube with tube infla-
tion stem in cutout of wheel hub.
b. Place spacer and wheel flange on inboard side
of wheel hub (opposite of tube inflation stem).
c. Place washer under head of each capscrew, in-
sert capscrew thru brake disc, wheel flange, and
spacer and start capscrews into wheel hub threads.
ICAUTION\
Be sure that spacers, wheel flanges and
brake disc are seated on flange of wheel
hub. Uneven or improper torque of cap-
screws can cause failure of capscrews or
hub threads with resultant wheel failure.