Piper SARATOGA PA-32-301 Maintenance Manual page 68

PIPER AIRCRAFT
PA-32-301/301T
*MAINTENANCE MANUAL
RECOMMENDATIONS FOR CHANGING OIL. (Refer to the latest revision of Lycoming Ser ice
Instruction No. 1014 and Lycoming Service Letter No. L185.)
I.
In engines that have been operating on straight mineral oil for several hundred hours. a change to
additive oil should be made with a degree of caution. since the cleaning action of some additive 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. the switch to additive or compounded oil should be
deferred until after the engine is overhauled.
2.
When changing from straight mineral oil to compounded oil. the following precautionary steps
should be taken:
A. Do not add additive oil to straight mineral oil. Drain the straight mineral oil from the engine and
fill with additive oil.
B. Do not operate the engine longer than five hours before the first oil change.
C. Check all oil screens for evidence of sludge or plugging and change oil every ten hours if sludge
conditions are evident. Resume normal oil drain periods after sludge conditions improve.
OIL FILTER (FULL FLOW).
I. The oil filter should be replaced after each 50 hours of engine operation: this is accomplished by
removing the lockwire from the bolthead at the end of the filter housing, loosening the bolt. and removing the
filter assembly from the adapter.
2.
Before discarding the throwaway filter. remove the element for inspection by using a Champion
cutter tool. CT-470. available from Champion Spark Plug Co.. Toledo. Ohio 43601. It will cut open any spin
on type oil filter for inspection. Examine the material trapped in the filter for evidence of internal engine
damage. such as chips or particles from bearings. In new or newly overhauled engines. some small particles of
metallic shavings might be found: these are generally of no consequence and should not be confused with
particles produced by impacting. abrasion or pressure. Evidence of internal engine damage found in the oil
filter justifies further examination to determine the cause.
3. After the filter has been replaced. tighten the cartridge within 18 to 20 foot-pounds of torque.
Lockwire the bolt through the loops on the side of the housing to the drilled head of the thermostatic valve. Be
sure the lockwire is replaced at both the attaching bolthead and the thermostatic oil cooler bypass valve. Use
MS-20995-C41 safety wire.
12-12-06
Page 12-04
Revised: August 11, 1983
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