Installation Of Aft Oxygen Cylinder And Regulator; Removal Of Forward Oxygen System Charging Valve; Installation Of Forward Oxygen System Charging Valve; Removal Of Aft Oxygen System Charging Valve - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
CAUTION
Verify the cylinder valve is closed prior to disconnecting any lines
from the regulator.
a.
Disconnect the control cable from the regulator.
b. Disconnect the lines from the regulator.
c.
Loosen and separate the mounting bracket assembly clamps that hold the cylinder in place.
d. The cylinder can be removed by first sliding it back to remove the retaining cable.
e. Remove the cylinder from the airplane using caution not to bump the neck of the cylinder and
regulator.
CAUTION
The cylinder must be completely discharged of all pressure prior
to removing the regulator.
14-13. INSTALLATION OF AFT OXYGEN CYLINDER AND REGULATOR.
a. With the regulator attached to the cylinder, place the cylinder in the mounting brackets with the
regulator forward. Be careful not to bump the regulator and cylinder during installation.
b. Install the retaining cable around cylinder neck and position cylinder so the control on the
regulator aligns with the control cable.
c.
Secure the cylinder in place by connecting and tightening the mounting bracket assembly clamps.
d. Connect the pressure lines and control cable to the regulator.
e. Install aft panel in rear baggage compartment and secure with appropriate screws.
14-14. REMOVAL OF FORWARD OXYGEN SYSTEM CHARGING VALVE.
a. Remove the floor panel from the left side at the rear of the forward baggage compartment.
Verify cylinder valve is closed.
b.
Disconnect the tee fitting from the charging valve.
c. Remove the three nuts and bolts holding the charging valve in place and remove the valve through
the access door on the outside of the fuselage, below the valve.
14-15. INSTALLATION OF FORWARD OXYGEN SYSTEM CHARGING VALVE.
a. Place the valve into position through the access door and replace the three bolts and nuts.
b.
Tighten the three bolts and reconnect the tee fitting.
c. Install the floor in the baggage compartment.
14-16. REMOVAL OF AFT OXYGEN SYSTEM CHARGING VALVE.
a.
Remove the screws securing the rear panel in the aft baggage compartment and remove the panel.
Verify cylinder valve is closed.
b. Disconnect the tee fitting from the charging valve.
c. Remove the three nuts and bolts holding the charging valve in place and remove the valve through
the access door on the outside of the fuselage.
14-17. INSTALLATION OF AFT OXYGEN SYSTEM CHARGING VALVE.
a. Place the valve into position through the access door and replace the three bolts and nuts.
b. Tighten the three bolts and reconnect the tee fitting.
c.
Install aft panel in rear baggage compartment and secure with appropriate screws.
Reissued: 9/23/80
ACCESSORIES AND UTILITIES
4E12