Cessna 150M - Nose Wheel Removal and Installation; Nose Wheel Disassembly; Nose Wheel Inspection and Repair; Nose Wheel Reassembly

g. If shock strut was deflated, service after in-
stallation has been completed (see Section 2).
ICAUTION\
Always check scraper clearance after installing
speed fairing, whenever a tire has been chang-
ed, and whenever scraper adjustment has
been disturbed. Set clearance between tire
and scraper for a minimum of 0.25 inch to
a
maximum of 0.38 inch. Elongated holes in
the scraper are provided for adjustment. If
the aircraft is flown from surfaces with mud,
snow,
or ice, the speed fairings should be
checked to make sure there is no accumu-
lation which could prevent normal wheel ro-
tation. Wipe fuel and oil from speed fairing
to prevent stains and deterioration of the
fairingo
5-29. NOSE WHEEL REMOVAL AND INSTALLATION.
a. Weight or tie-down tail of aircraft to raise the
nose wheel off the floor.
b. Remove nose wheel axle bolt.
c. Pull nose wheel assembly from fork and remove
axle tube from nose wheel. Loosen scraper if nec-
essary.
d. Reverse the preceding steps to install nose wheel.
Tighten axle bolt until a slight bearing drag is obvious
when wheel is rotated. Back the nut off to the nearest
castellation and install cotter pin.
On aircraft equipped with speed fairings, al-
ways check scraper-to-tire clearance after
installing speed fairing, whenever a tire has
been changed, or whenever scraper adjust-
ment has been disturbed. Set scraper clear-
ance in accordance with paragraph 5-28.
5-30.
NOSE WHEEL DISASSEMBLY (Cleveland
Wheel).
a. Remove hub caps, completely deflate tire and
break tire beads loose at wheel rim.
IWARNING'
Injury can result from attempting to separate
wheel halves with the tire inflated. Avoid
damaging wheel flanges when breaking tire
beads loose.
b. Remove thru-bolts and separate wheel halves.
c, Remove tire and tube from wheel halves.
d. Remove bearing retaining rings, grease felt
seals and bearing cones.
NOTE
The bearing cups (races) are a press fit
in the wheel halves and should not be re-
moved unless a new part is to be installed.
To remove bearing cups, heat wheel halves
in boiling water for 30 minutes, or in an
oven not to exceed 149°C (300°F). Using
an arbor press, if available, press out the
bearing cup and press in the new bearing
cup while the wheel half is still hot.
5-31. NOSE WHEEL INSPECTION AND REPAIR
(Cleveland Wheel).
a. Clean all metal parts and grease seal felts in
solvent and dry thoroughly.
b. Inspect wheel halves for cracks. Cracked wheel
halves shall be discarded and new parts used. Sand
out nicks, gouges, and corroded areaso When pro-
tective coating has been removed, the area should be
cleaned thoroughly, primed with zinc chromate and
painted with aluminum lacquer.
c. 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 half.
5-32. NOSE WHEEL REASSEMBLY (Cleveland
Wheel).
a. Insert tube in tire, aligning index marks on
tire and tube.
b. Place tire and tube on wheel half and position
valve stem through hole in wheel half.
c. Insert thru-bolts, position other wheel half, and
secure with nuts and washers. Take care to avoid
pinching tube between wheel halves. Tighten thru-
bolt nuts to the torque values stipulated in figure 5-2A.
ICAUTION\
Uneven or improper torque on the thru-
bolt nuts may cause bolt failure with re-
sultant wheel failure.
d. Clean and pack bearing cones with clean aircraft
wheel bearing grease (Section 2).
e. Assemble bearing cones, seals, and retainers
into the wheel halves.
f. Inflate tire to seat tire beads, then adjust to
correct pressure (figure 1-1).
5-33. NOSE WHEEL DISASSEMBLY (McCauley Wheell
with Thru-bolts).
a. Remove hub caps, completely deflate tire, and
break tire beads loose at wheel flanges.
IWARNING'
Injury can result from attempting to remove
wheel flanges with tire and tube inflated.
Avoid damaging wheel flanges when breaking
tire beads loose. A scratch, gouge or nick
in wheel flange may cause wheel failure.
b. Remove thru-bolt nuts and washers.
c. Remove thru-bolts and separate wheel flanges
from wheel hub.. Retain spacers between wheel
flanges and wheel hub.
d. Remove wheel hub from tire and tube.
e. Remove retainer rings and remove grease seal
retainers, grease seal felts, and bearing cones from
wheel hub.
Change 3 5-17
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