Piper COMANCHE PA-24-180 Service Manual page 61

PIPER COMANCHE SERVICE MANUAL
TABLE I1-111. INDICATED OXYGEN CYLINDER PRESSURES
FOR GIVEN AMBIENT TEMPERATURES
INDICATED CYLINDER PRESS
PSI
TEMPERATURE OF
110
100
90
80
70
60
50
40
1980
1935
1890
1845
1800
1755
1710
1665
2-58 Filling Oxygen Cylinder. The filler valve for the oxygen system is accessible through a door located
on the left side of the fuselage just aft of the rear window.
a. To fill the oxygen cylinder. open the access door. remove the cap from the filler valve and attach
the filler hose from the oxygen recharge unit to the filler valve Ascertain that all fittings are free from oil.
grease. dirt. etc
NOTE
If the airplane's oxygen cylinder pressure is below 50 psi. the system
should be purged as described in Paragraph 2-71.
b To obtain the correct filling pressure for the oxygen cylinder at various ambient temperatures a
chart has been included for your convenience The pressures given are not exact. but sufficiently accurate for
practical purposes of working pressure between 1800 and 2400 psig cylinders The cylhnder should be allowed
to cool to a stabilized temperature after filling before checking against the figures given in Table I1-111
c.
When using a recharge unit consisting of one supply cylinder. slowly open the valve of the supply
unit and allow the oxygen to transfer
d When using a recharge unit consisting of two or more supply cylinders (cascade storage system). it
is recommended that the following procedure be used.
REVISED: 4/3/78
HANDLING AND SERVICING
1C13