THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 11
Jun 1/03
3J1
35-10-00
D. Cleaning and Purging
CAUTION: CARE MUST BE EXERCISED TO PREVENT CONTAMINATION OF COMPONENTS
BY OIL, GREASE, WATER, OR FOREIGN MATTER. COMPRESSED AIR USED IN
CLEANING AND FLUSHING TUBES MUST BE CLEAN, DRY, FILTERED (OIL FREE)
AIR ONLY.
(1) Three methods are recommended for cleaning oxygen system components:
(a) Method I
1 Vapor degrease part(s) with trichlorethylene.
2 Blow part(s) dry with a stream of compressed air or dry nitrogen. See CAUTION,
above.
(b) Method II
1 For tubing, flush with naptha per specification TT-N-95.
2 Blow clean and dry off all solvent with clean, dry, filtered air. Refer to previous
caution.
3 Flush with isopropyl alcohol.
4 Rinse thoroughly with fresh water.
5
Dry with air as described in previous caution or by heating at a temperature of 250°
to 300°F for one-half hour.
NO
TE
: Solvents can be reused provided they do not become badly contaminated
with oil. This condition can be determined by thoroughly evaporating 100
millimeters of the liquid in a glass dish of a determined weight. Evaporation
may be accomplished by heating the dish at 200°F (93°C) for one-half hour.
If after evaporation and cool down, the residue exceeds 100 milligrams in
weight, the solvent cannot be used for this purpose.
(c) Method III
1
Flush with hot inhibited alkaline cleaner until free from oil and grease.
2 Rinse thoroughly with fresh water.
3 Dry thoroughly with a stream of clean air as described in the previous caution or by
heating 250°F to 300°F (121°C to 149°C) for one-half hour minimum.
CAUTION: DO NOT USE ADHESIVE TAPE FOR ATTACHING OR SECURING
PROTECTIVE COVERINGS ON OXYGEN COMPONENTS. USE
WAXED LACING TWINE OR TIE RAPS.
(2) After cleaning, all tubing must be protected by caps, plugs and/or plastic bags.
(3) Before installation, make sure fitting, tube, and fixture threads are in good condition and that
the cones do not exhibit pitting or disfigurement.
E. Swageloc Fitting Installation (Refer to Figure 5.)
NOTE: The high pressure line fitting at the regulator should be tightened until it bottoms. Make
sure to use teflon tape on all male pipe threads.
(1) For swageloc fittings not preswaged or for in-aircraft installation, proceed as follows:
(a) Turn the fitting nut onto the fitting finger tight and insert the tube until it bottoms firmly on
the shoulder in the fitting.
(b) Tighten the nut with a wrench until the tube will not turn by hand.
(c) Mark the nut at the six o'clock position.
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