Piper SARATOGA PA-32-301 Maintenance Manual page 385

PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
REMOVAL OF RECHARGE VALVE.
The recharge valve is located on the left rear side of the aircraft and is covered by its own access door. The
valve is interconnected with the gauge line as well as the regulator-control valve and is constantly under
cylinder pressure as long as the high pressure line is attached to the regulator.
-NOTE -
The recommended service life for the recharge valve is 5 years, and
the oxygen cylinder must be hydrostatically tested every 5 years.
With these circumstances in mind it is recommended that the
recharge valve be removed and replaced when the cylinder is
removed for service.
1. Due to the location of the recharge valve it is necessary to remove the oxygen cylinder. For ease of
removal it is recommended that the cylinder shelf also be removed.
2. Remove the screws that secure the recharge valve's protective shroud to the valve mounting dish, and
slide the shroud back over the high pressure line.
3. Unscrew the high pressure line fitting from the recharge valve and with somebody turning the screw
from outside the aircraft, backup the nut to remove the valve.
INSTALLATION OF RECHARGE VALVE.
1. Insert the valve through the aperture in the mounting cup and align the bolt holes.
2. With the safety chain and information plate mounting washer aligned at one of the holes, install the
mounting bolts.
3. Apply teflon tape to male threads as explained earlier in this section.
4. Reconnect the high pressure line to the valve and torque the fitting 30 in.-lbs. min. to 150 in.-lbs. max.
(Refer to Figure 35-6.)
5. Reinstall the valve protective shroud.
INSTALLATION OF OXYGEN CYLINDER.
. Before mounting the cylinder to the shelf, connect the control cable to the control valve-regulator. If
the shelf has been removed reinstall it before continuing. Install teflon tape per prior instructions in this
chapter.
2. Position cylinder on shelf and install the pressure lines. Insert tubing into fitting until ferrule seats in
fitting. Tighten the nut by hand and then one quarter turn with a wrench. If fitting is relatively new the nut
might be turned 3/4 of a turn. Follow up by snugging the nut slightly with a wrench.
3. Install the cylinder protective shroud and tighten the clamps securing it to the tank and valve.
4. Secure the cylinder to the shelf by connecting and tightening the clamps.
5. If vent tube has been disconnected from the shroud make sure it is firmly attached to both the cylinder
and valve shrouds.
6. Make sure all seals are properly in place in the cylinder shroud. Make sure the MS35489-35 seal is in
the bottom of the shroud where the low pressure line comes through. The two seals where the high pressure
lines go into the shroud are MS35489-2 grommet seals.
7. Check pressure and refill bottle as necessary.
8. Inspect for leaks, especially at fittings that have been separated.
35-10-11
Page 35-13
2E20
Revised: September 23, 1981
2E20