Piper PA-34-200T Seneca II Service Manual Download

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PIPER SENECA II SERVICE MANUAL

2-58. OIL SCREEN (SUCTION).

The oil suction screen is located on the bottom aft end of the engine sump, installed horizontally. To
remove, cut the safety wire and remove the hex head plug. The screen should be cleaned at each oil
change to remove any accumulation of sludge and to examine for metal filings or chips. If metal
particles are found in the screen, the engine should be examined for internal damage. After cleaning and
inspection, place the screen inside the recess in the hex head plug to eliminate possible damage to the
screen. Insert the screen into the housing and when certain that the screen is properly seated, tighten and
safety the plug with MS-20995-C41 safety wire.

2-59. OIL FILTER (FULL FLOW).

The oil filter should be replaced after each 50 hours of engine operation; this is accomplished by
removing the lockwire from the bolt head at the end of the filter, loosening and removing the filter
assembly from the adapter.

Before discarding the filter, remove the outer cover, and using a sharp knife, cut through the folds of
the element at both ends. Then carefully unfold the pleated element and 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 particle or 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.

NOTE

Ascertain that oil filter completes with specifications of Continental
Aircraft Engine Service Bulletin M75-7.

Before installing the new filter, lubricate the gasket on the filter with engine oil, then install. Tighten
slightly more than hand tight or 3/4 to 1 full turn after gasket makes contact. Do not over torque.

Run the engine and check for oil leaks; then install lockwire between nut on filter and oil filter
adapter assembly.

2-60. RECOMMENDATIONS FOR CHANGING OIL.

The engine manufacturer recommends that the oil supply be drained and the entire sump filled with fresh
oil after each 50 hours or four months of engine operation. Always start and warm the engine to
operating temperature before performing an oil change. While draining the oil, the screens should be
removed from the crankcase cover and cleaned thoroughly. If sludge deposits are heavy, subsequent oil
changes should be made at shorter intervals. Detergent oil that meets the latest revision of Continental
Motors Corporation Specification MHS-24, is the only recommended lubricating oil. Use SAE-30 15W-
50 or 20W-50 below 40°F and SAE-50 15W-50, 20W-50 or 25W-60 above 40°F. When the average
ambient air temperature is approximately at the dividing line, use the lighter oil.

Piper PA-34-200T Seneca II, Service Manual

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