PIPER SENECA II SERVICE MANUAL
XIV - ACCESSORIES AND UTILITIES 01/01/09
3C22
14-79. REMOVAL OF PORTABLE OXYGEN UNIT. (See Figure 14-19.)
W
ARNING: DO NOT USE GREASE OR ANY GREASE TYPE FITTINGS ON ANY HARDWARE
THAT CONNECTS TO THE OXYGEN BOTTLE OR SYSTEM HARDWARE. WHEN
WORKING WITH THE OXYGEN SYSTEM MAKE SURE HANDS, CLOTHING, AND
TOOLS ARE FREE OF OIL, GREASE AND DIRT.
The oxygen unit can be released from its cradle by pulling down on the ring under the cradle, sliding the
unit forward, and lifting it out of its cradle.
14-80. OXYGEN CYLINDER (Refer to Figure 14-20 and 14-21).
A. Removal of Oxygen Cylinder and Regulator (Fixed System) (Refer to Figures 14-21 and 14-22)
The oxygen cylinder is located in the tail section at station 222.437.
1. Remove the rear bulkhead door assembly.
CA
UTION
: BE SURE THE VALVE ON THE CYLINDER IS CLOSED BEFORE
DISCONNECTING ANY LINES FROM THE REGULATOR.
2. Remove the oxygen cylinder shroud clamps.
3. Remove control cable from the regulator assembly.
4. Remove the two screws securing the halves of the oxygen cylinder shroud together.
5. Carefully slide the shroud halves apart.
6. Disconnect the pressure lines from the regulator.
7. Remove the clamps securing the oxygen cylinder to the oxygen bottle shelf assembly and
remove the cylinder from the airplane.
CA
UTION: ASCERTAIN THAT THE CYLINDER IS EMPTY BEFORE REMOVING
REGULATOR.
B. Installation of Oxygen Cylinder and Regulator. (Fixed System)
1. Place the cylinder and regulator assembly into position through bulkhead door assembly. Align
regulator with control cable and secure cylinder with clamps.
2. Connect the pressure lines to the regulator.
3. Slide the shroud halves together and secure with two clamps and two screws.
4. Attach control cable to the regulator assembly.
5. Check for security of installation and install rear bulkhead door assembly.
6. Recharge the oxygen cylinder if not already accomplished.
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