Cessna 150M - Aluminum Surfaces; Engine and Engine Compartment; Upholstery and Interior; Propeller

period will have been completed prior to delivery of
the aircraft. In the event that polishing or buffing is
required within the curing period, it is recommended
that the work be done by an experienced painter.
Generally, the painted surfaces can be kept bright by
washing with water and mild soap, followed by a
rinse with water and drying with cloths or chamois.
Harsh or abraSive soaps or detergents which could
cause corrosion or make scratches should never be
used. Remove stubborn oil and grease with a cloth
moistened with Stoddard solvent. After the curing
period, the aircraft may be waxed with a good auto-
motive wax. A heavier coating of wax on the leading
edges of the wing and tail and on the engine nose cap
will help reduce the abrasion encountered in these
areas.
1
2-34. ALUMINUM SURFACES. The aluminum sur-
faces require a minimum of care, but should never
be neglected. The aircraft may be washed with clean
water to remove dirt and may be washed with non-
alkaline grease solvents to remove oil and/or grease.
Household type detergent soap powders are effective
cleaners, but should be used cautiously since some
of them are strongly alkaline. Many good aluminum
cleaners, polishes, and waxes are available from
commercial suppliers of aircraft products.
2-35. ENGINE AND ENGINE COMPARTMENT. The
engine should be kept clean since dirty cooling fins
and baffle plates can cause overheating of the engine.
Also, cleaning is essential to minimize any danger of
fire and provide for easier inspection of components.
The entire engine cowling may be removed to facili-
tate engine and interior cowl cleaning. Wash down
the engine and components with a suitable solvent,
such as Stoddard solvent or equivalent, then dry thor-
oughly with compressed air.
ICAUTION\
Particular care should be given to electrical
equipment before cleaning. Solvent should
not be
allowed to enter magnetos, starters,
alternators, voltage regulators, and the
like. Hence, these components should be
protected before saturating the engine with
solvent. Any fuel, oil, and air openings
should be covered before washing the engine
with
solvent. Caustic cleaning solutions
should not be used. After cleaning engine
re-lubricate all control arms and moving
parts.
2-36. UPHOLSTERY AND INTERIOR. Keeping the
upholstery and interior clean prolongs upholstery fab-
ric and interior trim life. To clean the interior, pro-
ceed as follows:
a. Empty all ash trays and refuse containers.
b. Brush or vacuum clean the upholstery and carpet
to remove dust and dirt.
c. Wipe leather and plastic trim with a damp cloth.
d. Soiled upholstery fabrics and carpet may be
cleaned with a foam-type detergent used according
to the manufacturer's instructions.
e. Oil spots and stains may be cleaned with house-
hold spot removers, used sparingly. Before using
any solvent, read the instructions on the container
and test it on an obscure place in the fabric to be
cleaned. Never saturate the fabric with volatile sol-
vent; it may damage the padding and backing material.
f. Scrape sticky material from fabric with a dull
knife,
then spot clean the area.
2-37. PROPELLER. Wash hub and blades with a
soft cloth and Stoddard cleaning solvent or equivalent,
then dry thoroughly with compressed air. The pro-
peller should be wiped occasionally with an oily cloth,
then wiped with a dry cloth. In salt water areas this
will aSSist in corrosion proofing the propeller.
2 -38. WHEELS. The wheels should be washed
periodically and examined for corrosion, chipped
paint, and cracks or dents in the wheel halves or in
the flanges or hubs. If defects are found remove and
repair in accordance with Section 5. Discard cracked
wheel halves, flanges or hubs and install new parts.
2-39. LUBRICATION.
2-40. Lubrication requirements are shown in figure
2-5. Before adding grease to grease fittings, wipe
dirt from fitting. Lubricate until grease appears
around parts being lubricated, and wipe excess
grease from parts. The following paragraphs sup-
plement figure 2-5 by adding details.
2-41. TACHOMETER DRIVE SHAFT. Refer to
Section 15 for details on lubrication of shaft.
2-42. WHEEL BEARINGS. Clean and repack the
wheel bearings at the first 100-hour inspection and
at each 500-hour inspection thereafter. If more
than the usual number of take-offs and landings are
made, extensive taxiing is required, or the aircraft
is operated in dusty areas or under seacoast condi-
tions, cleaning and lubrication of the wheel bearings
shall be accomplished at each 100-hour inspection.
2-43. NOSE GEAR TORQUE LINKS. Lubricate nose
gear torque links every 50 hours. When operating in
dusty conditions, more frequent lubrication is re-
quired.
2 -44. WING FLAP AC TUA TOR.
a. On aircraft prior to Serials 15072630, F15000739,
A15000278
and FA15000133 not modified by Service Kit
SK150-37B and SK150-41, proceed as follows:
1. At
each 100 hour inspection, inspect wing flap
actuator jack screw and ball retainer assembly for
lubrication, and lubricate if required. Also, remove,
clean and lubricate jack screw whenever actuator slip-
page is experienced. If lubrication is required, pro-
ceed as follows:
a. Gain access to actuator by removing appro-
priate inspection plates on lower surface of wing.
b. Expose jack screw by operating flaps to full-
down position. '
c. Wipe a small amount of lubricant from jack
screw with a rag and examine for condition. Lubri-
cant should not be dirty, sticky, gummy or frothy in
appearance.
d. Inspect wiped area on jack screw for presence
of hard scale deposit. Previous wiping action will have
exposed bare metal if no deposit is present.
Change 3 2 -13