Pressure Relief Valve; Removal Of Pressure Relief Valve; Installation Of Pressure Relief Valve; Pneumatic System Setup Procedure - Piper PA-31-350 Maintenance Manual

PIPER AIRCRAFT
T-1020
MAINTENANCE MANUAL
2. Connect the inlet and outlet hoses to the pump and secure the hoses to the ports with the hose
clamps.
3. Replace engine cowling.
PRESSURE RELIEF VALVE.
REMOVAL OF PRESSURE RELIEF VALVE.
1. Remove access panel on top of nacelle.
2. Disconnect hose clamps and remove hoses from valve.
3. Remove hardware attaching valve to bracket and remove valve from nacelle.
INSTALLATION OF PRESSURE RELIEF VALVE.
1. Secure valve to bracket.
2. Connect hoses to valve.
3. Secure hoses to valve with hose clamps.
4. Reinstall access panel.
PNEUMATIC SYSTEM SETUP PROCEDURE.
The pneumatic system setup procedures given in these instructions cover four combinations of
instrument and accessory installations. These are as follows: Pilot's and Copilot's Gyro Installation with
Deicer Boots, Pilot's Gyros and Deicer Boots, Pilot's Gyros and Copilot's Gyros, and Pilot's Gyros only.
Before attempting any adjustments, ascertain that all line connections are tight.
- CAUTION -
Do not use air sources other than engine driven system pumps.
-NOTE -
Insure engines are up to operating temperature prior to checking
or adjusting the pneumatic system.
- WARNING -
Do not make adjustments of the pressure control valves that are
within the engine nacelles while engines are running.
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Page 36-03
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Issued: September 2, 1981
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