Piper Navajo PA-31 Service Manual page 980

PIPER NAVAJO SERVICE MANUAL
PARTS
INSPECTION
OVERHAUL
Regulator
Pressure Gauge
High Pressure Lines
Low Pressure Lines
Outlets (Cabin)
External Recharge Valve
Masks
300 Flight Hrs.
300 Flight Hrs.
300 Flight Hrs.
300 Flight Hrs.
300 Flight Hrs.
Each Use
Each Use
6 Yrs.
Replace On Condition
Replace Every 6 Yrs.
Replace Every 6 Yrs.
Replace as Necessary
(b). After evaporation, cool and weigh the residue. The solvent shall not be used if the
residue exceeds 100 milligrams in weight.
c. Third Method:
1. Flush with hot inhibited alkaline cleaner until free from oil and grease.
2. Rinse thoroughly with fresh water.
3. Dry thoroughly with a stream of clean, dried, water pumped air or by heating at a
temperature of 250
°
to 300 F for a suitable period.
14-10. REMOVAL OF OXYGEN CYLINDER AND REGUALTOR. The FWD cylinder located in the left
side of the nose section below and to the rear of the baggage compartment is removed by removing the left
hand floor panel from the rear of the baggage compartment and the access panel on the left side of the nose
section just aft of the baggage compartment door. The regulator can be reached through the baggage compart-
ment and the cylinder is removed through the outer access opening. The aft cylinder located in the aft fuselage
just aft of the passenger compartment is removed by removing the access panel on the right side of the aft
fuselage. The regulator can be reached through the access opening also.
CAUTION
Be sure the valve on the cylinder is closed before disconnecting
any lines from the regulator.
a.
Disconnect the control cable from the regulator.
b.
With lines disconnected, loosen the separate the clamps that hold the cylinder in place.
c.
Remove the cylinder from the airplane through the access opening. Use caution not to bump the
neck of the cylinder and regulator. The cylinder must be completely discharged of all pressure before removing
the regulator.
14-11. INSTALLATION OF OXYGEN CYLINDER AND REGULATOR
a. With the regulator attached to the cylinder, place it into the airplane through the access opening
with the regulator forward. Be careful not to bump the regulator and cylinder when installing them.
b. Position the cylinder so the control on the regulator aligns with the control cable.
c.
Secure cylinder in place by connecting and tightening the two clamps.
d. Connect the pressure lines to the regulator and also the control cable.
e. Replace the floor and access panels.
Reissued: 10/12/79
ACCESSORIES AND UTILITIES
5E7