THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 17
Jun 1/03
3J7
35-10-00
C. Pressure Gauge
The oxygen system pressure gauge is installed in the bottom center of the pilot’s instrument panel
below, and slightly right of, the control wheel. Access is obtained from beneath the instrument
panel.
The pressure gauge is tied into the same high pressure (H.P.) line as the recharge valve, through a
T-fitting near the tank regulator-control valve.
(1) Removal
CAUTION
: BEFORE ENTERING THE TAIL CONE, FIRST SUPPORT THE AIRCRAFT TAIL
WITH A SUITABLE TAILSTAND.
(a) At the oxygen cylinder:
1
Remove screws attaching finished bulkhead to fuselage bulkhead.
2 Remove finished bulkhead.
3 With immediate area clear of flammables (grease, hydraulic fluid, fuel, etc.) and
oxygen system off; connect a mask or tube to an outlet to exhaust any pressure in
the system.
NOTE: Continuous pressure is applied to high pressure line until it is disconnected
from cylinder. A check valve will close when high pressure line is
disconnected from cylinder. The closing of this valve is frequently
accompanied by a loud popping sound.
4
Carefully unscrew high pressure line until pressure decreases and then remove line.
Cap line immediately after removal.
(b) At the instrument panel:
1
Disconnect high pressure line from gauge and cap immediately.
2
Remove two nuts from brass studs securing gauge to panel.
3 Remove gauge from pilot’s side of instrument panel.
(2) Installation
(1) Insert pressure gauge into instrument panel.
(2) Secure to panel by installing nuts on the two brass studs extending from gauge. Finger
tighten, then snug with wrench. Be careful not to over torque; studs break off easily.
(3) Connect H. P. line to gauge.
(4) Connect H. P. line to cylinder.
(5) Inspect fittings that have been separated for leaks.
(6) Reinstall finished bulkhead in aft cabin, secure with screws.
(7) If used, remove tailstand from airplane.
D. Outlets
(1) Removal
(a) Check that the oxygen system is completely turned off. Insert an oxygen mask to release
pressure and ensure the system is off.
(b) With a suitable spanner wrench, unscrew and remove the outlet retainer ring(s) and
information plate(s).
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