Induction Air Filter - Cessna 177 SERIES Service Manual

c. (Without Quick-Drain Valve.) Remove oil drain 2-22. INDUCTION AIR FILTER. The filter keeps dust
plug from engine sump and allow oil to drain into a
and dirt from entering the induction system. The value
container.
of maintaining the air filter in good clean condition can
d. After engine oil has drained, close quick-drain
never be over stressed. More engine wear is caused
valve and remove hose. Install and safety drain plug.
through the use of dirty air filters than is generally
e. Remove and clean oil screen, or change external believed. The frequency with which the filter should be
oil filter element.
removed and cleaned will be determined primarily by
f. Service engine with correct quantity and grade aircraft operating conditions. A good general rule however,
of engine oil. is to remove and clean the filter at least every 50 hours
of engine operating time, and more frequently if war-
NOTE
rented by operating conditions. Some operators prefer
to hold spare induction air filters at their home base of
Refer to figure 2-3 for intervals for changing operation so that a clean filter is always readily avail-
oil and filter elements. able for use. Under extremely dusty conditions, daily
servicing of the filter is recommended.
NOTE
NOTE
To minimize loss of oil through the breather,
fill to specified oil level (7 quarts) on dipstick Bonding of the paper pleats to the face screen
for normal operation (flight of less than three
are to be checked during the 50 hour inspection.
hours duration). For extended flight, fill to The bonding holds the paper pleats in place, and
FULL mark (8 quarts) on dipstick. Do not if broken, the pleats are free to shift which can
operate with less than MINIMUM-FOR-
impair filtration. A face screen that is loose or
FLIGHT quantity (6 quarts). If an external gapping away from the paper pleats is indicative
oil filter is installed, one additional quart is of broken bonding and is cause to replace the
required when filter element is changed. filter element.
SHOP NOTES:
Change 8 2-7