DRAINING OIL SUMP
—NOTE—
Engine should be warm to ensure proper oil draining.
Drain oil as follows:
l. Remove engine cowl.
2. Open oil drain valve located on underside of engine by pushing arms of drain up and turning
counterclockwise. This will hold drain in open position.
3. Drain oil into suitable container and dispose.
FILLING OIL SUMP
Fill oil sump with oil to mark on engine dipstick. The quantity of oil required for the engine is found in
chapter 6. The specified grade of oil is found in chart 1202, Type of Lubricants, or on the engine oil filler
access door. To service engine with oil, open quick release access door on top of cowl and remove oil filler cap
with dipstick.
OIL SCREEN (Suction)
The oil suction screen, located on bottom aft end of engine sump is installed horizontally. To remove,
proceed as follows:
1. Cut safety wire and remove hex head plug.
2. Clean screen at each oil change to remove any accumulation of sludge and check for metal filings or
chips. If metal particles are found in screen, the engine must be examined for internal damage.
3. After cleaning and inspection, to eliminate possible damage, place screen inside recess in hex head
plug.
4. Insert the screen into housing.
5. When certain that screen is properly seated, tighten and safety plug with MS-20995-C4l safety wire.
RECOMMENDATIONS FOR CHANGING OIL (Refer to latest revision of Lycoming Service Instruction
No. l0l4 and Lycoming Service Letter No. Ll85.)
—CAUTION—
Do not add ashless dispersant oil to mineral oil or switch to
dispersant oil Dispersant oil will loosen sludge deposits and can
plug screens and lubrication parts in the engine and cause
failure or serious damage.
In engines that have been operating on straight mineral oil for several hundred hours, a change to ashless
dispersant oil must be made with caution. The cleaning action of some ashless dispersant oils will tend to
loosen sludge deposits and cause plugged oil passages. When an engine has been operating on straight mineral
oil and is known to be in excessively dirty condition, switch to ashless dispersant oil should be deferred until
after engine is overhauled..
12 - 12 - 00
Page - 12 - 03
Reissued: August 1, 1986
1C23
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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