Piper SEMINOLE PA-44-180, Maintenance Manual

Page: 765 / 881

3. Position the turbocharger on the engine mounting flange, secure with three bolts and torque to 360 in. lbs.
Safety with .032 safety wire.
4. Mate the turbine housing inlet to the exhaust system mounting flange. Coat the threads of the mounting
bolts with Fel-Pro high temperature compound (or equivalent). Install and tighten the hardware to 360 in.
lbs.
5. After installing new gaskets, connect the engine oil supply line to the turbocharger oil inlet port and connect
the engine oil return line to the oil drain port.
6. Align the exhaust system mounting flange to the turbine housing outlet and secure.
7. Perform the prelubrication procedure as described in “Prelubrication of Turbocharger”.
8. Align the carburetor inlet duct with the compressor housing outlet and secure.
9. Align the duct from the engine air cleaner to the turbocharger compressor inlet. Before tightening the duct
connection, check whether bending loads are imposed upon the turbocharger by the ducting or other engine
components.
— Note —
Bending loads imposed upon the turbocharger can add stress and reduce service life.
Should bending loads be present, perform the necessary repairs to alleviate the loads and then tighten the duct
connection.
PRELUBRICATION OF TURBOCHARGER.
Upon completion of engine oil and filter change and following any prolonged period of non-operation,
prelubrication of the turbocharger should be completed as follows:
1. Temporarily disconnect the engine oil supply line from the turbocharger oil inlet port and the engine air duct
from the compressor housing inlet.
2. Fill the turbocharger oil inlet port with clean engine oil and manually turn the compressor wheel several
revolutions to coat all journal and bearing surfaces with oil. Reconnect the air duct.
3. Place a suitable container under the disconnected engine oil supply line to avoid spilling oil on the engine.
4. Check that engine oil is at the 6 quart level. Remove the lower spark plugs, place the magneto switches
“OFF”, mixture control in “IDLE CUT-OFF” and the fuel selector in “OFF”.
5. Using a 12 to 15 volt external power source, crank the engine until a steady flow of oil is obtained from the
supply line indicating that air has been purged from the system. Reconnect the oil supply line.
6. If the turbocharger is being installed on a new or newly overhauled engine which has not completed its
initial run-in period, refer to “Initial Run-in Procedure Precautions.”
— CAUTION —
O P E R ATION OF THE ENGINE AT A SPEED GREATER THAN IDLE
IMMEDIATELY AFTER START CAN RESULT IN “OIL LAG” FAILURE OF
THE TURBOCHARGER BEARINGS. THIS IS ESPECIALLY TRUE DURING
COLD WEATHER OR AFTER A PROLONGED NON-OPERAT I O N A L
PERIOD
7. Ensure that all air and exhaust inlet ducts and filters are properly installed. Start the engine and idle for
three or four minutes allowing engine oil pressure and flow to stabilize. Shut-down the engine and check
for for oil leaks. Tighten or repair as needed.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
8 1 - 2 3 - 0 0
Page 81-09
Revised: May 15, 1989
3J11
PIPER AIRCRAFT