Adjustment Of Turbocharger; Removal Of Density Controller; Installatoin Of Density Controller; Adjustment Of Density Controller - Piper Navajo Chieftain PA-31-350 Service Manual

2.
Install the left exhaust extension on the plenum and connect to the exhaust stack. A gasket
is installed between the exhaust stack and its extension.
3.
Secure the brackets that lead from the mounting bracket to the right and left exhaust
extensions.
NOTE
For all "V" band couplings on the exhaust system, be sure parts
are concentric before tightening coupling. Coupling will not center
parts automatically.
b.
The exhaust by-pass valve may be installed by the following procedure: (Refer to latest revision of
Lycoming Service Bulletin No. 450 or Airesearch Service Bulletin No. TP60-0119.)
1.
Attach and secure the by-pass valve to the exhaust plenum. A gasket is installed between the
by-pass valve and exhaust plenum.
2. Connect the lines to the by-pass actuator.
3. Connect the tailpipe assembly to the by-pass valve and the turbine discharge. A gasket is
installed between the by-pass valve and tailpipe assembly.
c.
The injector inlet plenum may be installed by the following procedure:
I. If the turbo is installed, connect the plenum to the compressor outlet with hose and clamps.
2.
Connect the lower portion of the plenum to the injector with hose and secure clamps.
3.
Connect the air duct to the compressor inlet and the exhaust to the turbine discharge.
4.
Connect the oil supply and return lines to the center section of the turbo.
d. Install the engine cowling. (Refer to Paragraph 8-8.)
8-38. ADJUSTMENT OF TURBOCHARGER. It is recommended that adjustments of the turbocharger be
conducted by an authorized overhaul facility, in accordance with the latest revision of Avco-Lycoming Service
Instruction No. 1187.
8-39. DENSITY CONTROLLER.
8-40. REMOVAL OF DENSITY CONTROLLER.
a. Remove engine cowling. (Refer to Paragraph 8-6.)
b. Disconnect oil lines at controller unit.
c. Remove the bolts securing the controller to the compressor discharge housing.
d. Remove the controller from the engine compartment.
8-41. INSPECTION AND REPAIR OF DENSITY CONTROLLER.
Refer to Garrett Airesearch Publication No. TP21-0108.
8-42. INSTALLATION OF DENSITY CONTROLLER.
a.
Ascertain that all oil inlet and outlet lines are clean.
b.
Mount the controller on the compressor discharge housing and secure with mounting bolts.
c. Reconnect inlet and outlet oil lines to the controller.
8-43. ADJUSTMENT OF DENSITY CONTROLLER.
Refer to the latest issue of Avco-Lycoming Service Instruction No. 1187 for adjustment procedures. A
list of special tools required to accomplish this adjustment is included in the Service Instructions.
8-44. DIFFERENTIAL PRESSURE CONTROLLER.
Revised: 3/11/81
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POWERPLANT
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NAVAJO CHIEFTAIN SERVICE MANUAL