Piper Arrow IV Turbo Maintenance Manual page 454

E. Dry with air as described in previous caution or by heating at a temperature of 250° to 300° F for one
half hour.
Solvents can be reused provided they do not become badly
contaminated with oil. This condition can be determined by
thoroughly evaporating 100 milliliters of the liquid in a glass dish
of a determined weight. Evaporation may be accomplished by
heating the dish at 200°F 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.
3. Method III.
A. Flush with hot inhibited alkaline cleaner until free from oil and grease.
B. Rinse thoroughly with fresh water.
C. Dry thoroughly with a stream of clean air as described in the previous caution, or by heating 250°
to 300° F for one half hour minimum.
4. After cleaning, all tubing must be protected by caps, plugs, and/or plastic bags.
Do not use adhesive tape on oxygen components for attaching or
securing protective coverings. Use waxed lacing twine or tie
wraps.
5. Before reinstallation make sure fitting, tube, and fixture threads are in good condition and that the
cones do not exhibit pitting or disfigurement.
SWAGELOC FITTING INSTALLATIONS. (Refer to Figure 35-5.)
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.
D. Hold the fitting body steady with a backup wrench and tighten as follows:
(1) On tubing with a diameter bigger then 3/16 inch, tighten 1-1/4 turns (to the nine o'clock
position).
(2) On tubing of 1/16, 1/8, and 3/16 inch diameter tighten only 3/4 turn.
E. If nut and tube must be disconnected from the fitting reconnect by seating the tube on the shoulder
of the fitting and tightening the nut finger tight. Follow up by tightening the nut with a wrench,
one-quarter turn (if absolutely necessary the original 1-1/4 or 3/4 tight position) and then snug
with wrench.
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
—NOTE—
—CAUTION—
—NOTE—
2H7
35-10-04
Page 35-09
Added: November 6, 1979