Piper Arrow IV Turbo Maintenance Manual page 690

GENERAL.
DESCRIPTION AND OPERATION.
The turbocharger system consists of a turbine and compressor assembly, ground adjustable exhaust bypass
screw and the necessary hose and engine air intake ducts. The ground adjustable exhaust bypass screw allows
exhaust gas to bypass the turbine and flow directly overboard. In the closed position, the bypass screw diverts
the exhaust gases into the turbine. The turbocharger requires little attention between overhauls. However, it is
recommended that the items outlined in the Inspection Report, Chapter 5 be checked periodically.
TURBOCHARGER.
REMOVAL OF TURBOCHARGER.
1. Remove the upper cowling.
2. Remove the turbocharger compressor and turbine assembly by the following procedure:
A. Disconnect the oil supply and return lines from the center section of the turbo.
B. Disconnect the air ducts from the compressor inlet and outlet, and the exhaust system from the
turbine inlet and outlet.
C. Remove safety wire securing the turbine insulation blanket and remove blanket.
D. Remove the bolts that attach the turbocharger to the mounting bracket and remove the
turbocharger assembly.
INSTALLATION OF TURBOCHARGER.
1. Position turbocharger assembly on the mounting bracket and secure with attaching hardware.
2. Align exhaust system manifold turbo inlet and the turbine inlet and secure with clamp temporarily.
3. Tighten the large diameter center clamp securing the turbine housing to the turbocharger.
The turbocharger is properly installed with the large diameter
center clamp loose to allow rotation of the turbine housing
during installation for proper alignment with the exhaust system
inlet connection. Tighten clamp after alignment.
When tightening any of the three V-band clamps, it is necessary
to tap the clamp an around its circumference to insure proper
seating. Do not rely on tightening alone for proper clamp seating.
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
—NOTE—
3H3
81-20-02
Page 81-01
Revised: December 21, 1981