THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 1
Jun 1/03
5G1
81-20-00
TURBO - SUPERCHARGER
WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING
OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY
RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY
PUBLICATIONS.)
1. Description
A turbocharger on the engine is operated by the engine exhaust gases. The exhaust gases drive a
turbine wheel which is coaxial with a compressor impeller. Induction air entering the compressor impeller
is compressed and flows to the engine induction distribution system and subsequently to each cylinder.
The amount of induction air compression is a function of engine power - low power = low compression;
high power = high compression. Excessive pressure and flow above the established limit is expelled by
the overboost valve.
The turbocharger control system consists of a hydraulically activated wastegate bypass valve, a sloped
controller and turbocharger. Automatic wastegate control of the turbocharger provides a constant
manifold pressure from sea level to critical altitude.
The turbocharger system requires little attention between turbo overhauls, with the exception of routine
inspections as specified in 5-20-00. Should trouble occur, refer to the Troubleshooting, below, and seek
out the possible cause. Do not break the clamp seal joining the turbine and compressor units.
2. Troubleshooting
Troubles peculiar to the turbocharger are listed in Chart 1 along with their probable causes and
suggested remedies.
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