Cessna 150M - Nose Gear Shock Strut Disassembly; Nose Gear Shock Strut Reassembly; Wheel Balancing

h. Tighten capscrews evenly and torque to the value
specified in figure 5 -2A.
i. Clean and pack bearing cones with clean aircraft
wheel bearing grease. (Refer to Section 2 for grease
type. )
j. Assemble bearing cones, grease seal felts and
retainer into wheel hub.
k.
Inflate tire to seat tire beads, then adjust to
correct tire pressure (refer to Section 1).
5-36. WHEEL BALANCING. Refer to paragraph
5-24 for wheel balancing information.
5-37. NOSE GEAR SHOCK STRUT DISASSEMBLY.
(See
figure 5-9.) The following procedures apply to
the nose gear shock strut after it has been removed
from the aircraft, and the speed fairing and nose
wheel have been removed. In many cases, separa-
tion of the upper and lower strut will permit inspec-
tion and parts installation without removal or com-
plete disassembly of the strut.
IWARNING'
Be sure strut is completely deflated before
removing lock ring in lower end of upper
strut, or disconnecting torque links.
a. Remove shimmy dampener.
b. Remove torque links. Note position of waShers,
shims, and spacers.
c. Remove lock ring from groove inside lower end
of upper strut. A small hole is provided at the lock
ring groove to facilitate removal of the lock ring.
NOTE
Hydraulic fluid will drain from strut as
lower strut is pulled from upper strut.
d. USing a straight sharp pull, separate upper and
lower struts. Invert lower strut and drain hydraulic
fluid.
e. Remove lock ring and bearing at upper end of
lower strut assembly. Note top side of bearing.
f. Slide packing support ring, scraper ring, retain-
ing ring, and lock ring from lower strut, noting re-
1ative position and top side of each ring; wire together
if desired.
g. Remove a-rings and back-up rings from packing
support ring.
h. Remove bolt securing tow bar spacers and slide
torque link fitting from lower strut.
NOTE
Bolt attaching tow bar spacers also holds
base plug in place.
i. Remove bolt attaching fork to strut barrel, and
remove base plug and metering pin from lower strut.
Remove a-rings and metering pin from base plug.
NOTE
Lower strut barrel and fork are a press fit,
drilled on assembly. Separation of these
5-22 Change 3
parts is not recommended, except for in-
stallation of a new part.
j. Pull orifice piston support from upper strut.
Remove a-ring and filler valve.
k. Remove retaining ring securing steering collar
to upper strut. Slide steering collar, shims, and
washer from upper strut. Note number of shims
between washer and steering collar.
5-38. NOSE GEAR SHOCK STRUT REASSEMBLY.
(See
figure 5 -9. )
a. Thoroughly clean all parts in cleaning solvent
and inspect them carefully. All worn or defective
parts and all a-rings and back-up rings must be
replaced with new parts.
b. Assemble the shock strut by reversing the order
of the procedure outlined in paragraph 5 -37 with the
exception that special attention must be paid to the
following procedures.
c. Sharp metal edges should be smoothed with No.
400 emery paper, then thoroughly cleaned with solvent.
d. Used sparingly, Dow Corning Compound DC4 is
recommended for a-ring lubrication. All other in-
ternal parts should be liberally coated with hydraulic
fluid during reassembly
NOTE
Cleanliness and proper lubrication, along with
careful workmanship are important during
assembly of the nose gear shock strut.
e. When installing steering collar, lubricate needle
bearings in collar in accordance with instructions
outlined in Section 2. If needle bearing is defective,
install new steering collar assembly. Use shims as
required between steering collar assembly and
washer to provide a snug fit with steering collar re-
taining ring installed. Shims of variable thickness
are available from the Cessna Service Parts Center
as follows:
1243030-5
1243030-6 .
1243030-7 .
0.006 inch
0.012 inch
0.020 inch
f. When installing the rod ends in the steering
collar, adjust to the dimensions shown in figure 5 -9.
g. When installing the lock ring in lower end of
upper strut, position lock ring so that one of its ends
covers the small access hole in the lock ring groove
at the bottom of the upper strut.
h. Temporary bolts or pins of correct diameter and
length are useful tools for holding parts in correct
relation to each other during assembly and installa-
tion.
i. After assembly of shock strut, install strut in
aircraft in accordance with paragraph 5 -27.
j. After installation of shock strut, fill and inflate
shock strut as outlined in Section 2.
5-39. TORQUE LINKS. The torque links are illus-
trated in figure 5-10, which may be used as a guide
for disassembly and reassembly. Torque links keep
the lower strut aligned with the nose gear steering
system, but permit shock strut action. Torque link