Main Wheel Alignment; Wheel Balancing; Trouble Shooting; Nose Gear - Cessna 150 STANDARD Service Manual

numbers and the correction imposed on the wheel by
the various shims are listed in sheet 2 of figure 5-5.
NOTE
Failure to obtain acceptable wheel alignment
through the use of the shims indicate a de-
formed main gear spring-strut or spring-strut
attaching bulkhead out of alignment.
1
5-23A. MAIN WHEEL ALIGNMENT (TUBULAR).
(Refer to figure 1-1. )
5-24. WHEEL BALANCING, Since uneven tire wear
is usually the cause of wheel unbalance, replacing the
tire probably will correct this condition, Tire and
tube manufacturing tolerances permit a specified
amount of static unbalance. The light-weight point of
the tire is marked with a red dot on the tire sidewall
and the heavy-weight point of the tube is marked with
a contrasting color line (usually near the inflation
valve stem). When installing a new tire, place these
marks adjacent to each other. If a wheel shows evi-
dence of unbalance during service, it may be stati-
cally balanced. Wheel balancing equipment is avail-
able from the Cessna Service Parts Center.
5-26. TROUBLE SHOOTING.
5-25. NOSE GEAR. The steerable nose wheel mount-
ed on an air-oil shock strut comprises the nose gear,
The shock strut is secured to the tubular engine mount.
Nose wheel steering is accomplished by two spring-
loaded push-pull tubes linking the nose gear steering
collar to the rudder pedal bars. A hydraulic fluid-
filled shimmy dampener is provided to minimize nose
wheel shimmy. A nose wheel speed fairing may be
installed as optional equipment. The various configu-
rations of these optional nose wheel speed fairings are
illustrated in figure 5-7. Disassembly, inspection and
repair, and reassembly of the various nose wheel con-
figurations are described in separate paragraphs for
each configuration. The solid wheels having two wheel
halves are manufactured by Cleveland Aircraft Pro-
ducts Co. and webbed wheels having two flanges and
a hub are manufactured by McCauley Industrial Corpo-
ration. The Cleveland wheels are shown in figure 5-S.
The McCauley wheels have either aluminum flanges
or steel flanges as shown in figure 5-SA. The alumi-
num flanges are attached to the wheel hub by thru-
bolts and nuts as shown in figure 5 -SA. The steel
flanges are attached to the wheel hub by either thru-
bolts or capscrews as shown in figure 5 -SA. During
assembly of the nose wheel, the thru-bolt nuts or cap-
screws, as applicable, shall be tightened evenly and
torqued to the value specified in figure 5-2A.
TROUBLE
PROBABLE CAUSE
REMEDY
NOSE WHEE L SHIMMY. Nose strut attaching bolts loose.
Tighten nose strut attaching bolts.
Loose or worn nose wheel
Tighten. Replace defective
steering linkage. parts with new parts.
Nose wheel out of balance.
Refer to paragraph 5-36.
Wheel bearings too loose.
Adjust properly.
Defective shimmy dampener.
Repair, or install new
shimmy dampener.
Shimmy dampener fluid low.
Refer to Section 2.
Loose torque links.
Add shims, or install new
parts as required.
NOSE STRUT DOES NOT HOLD
Defective or loose air filler
va~ve.
Check gasket and tighten loose valve.
AIR PRESSURE. Install new valve
if
defective.
Defective strut seals Install new seals.
HYDRAULIC FLUID LEAKAGE
Defective strut seals.
Install new seals,
FROM NOSE STRUT.
Change 3 5-13