Piper SARATOGA PA-32-301 Maintenance Manual page 388

PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
REMOVAL AND INSTALLATION OF OXYGEN ON/OFF CONTROL. (Refer to Figure 35-1.)
@
1. As shown in Figure 35-1. the on off control is mounted in the overhead vent panel. To remove the
control, drop the overhead panel and ducting and remove the retaining nut from the rear of the control cable
fitting.
2. Make access to the bottle: if necessary, and disconnect the cable from the regulator-control
mechanism.
3. Cut the tie-raps and securing the cable and pull cable from aircraft.
4. When installing a new cable, make sure new cable shield is cut to 113.5 inches long and that the core
has sufficient material to make a twin loop, two inches from the end of the shield. Install as follows:
A. Route cable through the hole in the overhead duct and as shown in Figure 35- . Tie-rap the cable
as before.
B. Make sure the cable properly reaches the valve and reinstall vent and panels. Reconnect cable to
control mechanism.
REFILLING OXYGEN SYSTEM.
- CA UTION -
Before servicing the oxygen system make sure the aircraft is securely
grounded electrically.
Do not attempt to tighten any connections while the system is
charged.
Do not operate on electrical equipment while servicing oxygen
system.
Refilling of oxygen systems should be done by qualified personnel. For comparison of filling pressures to
ambient temperatures. refer to Chart 3503. The following are parameters to be followed for filling.
1. Only aviators breathing oxygen (MIL-0-27210) and appropriate filling equipment should be used to
fill the system.
CHART 3503. FILLING PRESSURES FOR CERTAIN AMBIENT TEMPERATURES
Ambient Temperature
0
10
20
30
40
50
60
Filling Pressure
1650 (PSI)
1700
1725
1775
1825
1875
1925
Ambient Temperature
70
80
90
100
110
120
130
Filling Pressure
1975 (PSI)
2000
2050
2100
2150
2200
2250
NOTE:
Filling pressures are for 1850 PSI at 70
°
F. Table assumes 25
°
F rise due to heat of com-
pressor with max. fill rate.
35-10-16
Page 35-16
Revised: August 19, 1980
2E23