CESSNA
MODEL 172N
SECTIONS
HANDLING, SERVICE
& MAINTENANCE
SAE 40 between 30
°
F (-1
°
C) and 90
°
F (32
°
C).
I
SAE 30 between 0
°
F (-18
°
C) a.nd 70
°
F (21
°
C).
SAE 20W-30 below 0
°
F (-18
°
C) to 70
°
F (21
°
C).
CAPACITY OF ENGINE SUMP -- 6 Quarts.
Do not operate on less than 4 quarts. For extended flight, fill to 6 quarts.
These quantities refer to oil dipstick level readings. During oil and oil
filter changes, one additional quart is required when the filter is
changed.
OIL AND OIL FILTER CHANGE --
After the first 25 hours of operation, drain the engine oil sump and
clean the oil pressure screen (if an oil filter is not installed). If an oil
filter is installed, change the filter at this time. Refill sump with
ashless dispersant oil.
On airplanes not equipped with a.n oil filter, drain the engine oil sump
and clean the oil pressure screen each 50 hours thereafter.
On airplanes which have an oil filter, drain the engine oil sump and
change the oil filter again at the first 50 hours: thereafter, the oil and
filter change interval may be extended to 100-hour intervals.
Change engine oil at least every 6 months even though less than the
recommended hours have accumulated. Reduce intervals for pro
longed operation in dusty areas, cold climates, or when short flights
and long idle periods result in sludging conditions.
NOTE
During the first 25-hour oil and filter change, a general
inspection of the overall engine compartment is required.
Items which are not normally checked during a preflight
inspection should be given special attention. Hoses, metal
lines and fittings should be inspected for signs of oil and
fuel leaks, and checked for abrasions, chafing, security,
proper routing and support, and evidence of deterioration.
Inspect the intake and exhaust systems for cracks, evi
dence of leakage, and security of attachment. Engine
controls and linkages should be checked for freedom of
movement through their full range, security of attachment
and evidence of wear. Inspect wiring for security, chafing,
burning, defective insulation, loose or broken terminals,
heat deterioration, and corroded terminals. Check the
alternator belt in accordance with Service Manual instruc
tions, and retighten if necessary. A periodic check of these
items during subsequent servicing operations is recom
mended
1 July 1979
Revision 1 - 15 November 1979
8-11
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