2. Preswaged swageloc fittings are fabricated and installed as follows:
A. Assemble the nut and ferrules finger tight on the pre-swaging tool and insert the tube until it firmly
bottoms on the shoulder in the tool. The pre-swaging tool can be attained from Crawford Fitting
Company, refer to List of Consumable Materials in Chapter 91.
B. Tighten the nut on the fitting just enough that the tube within the fitting will not turn by hand.
C. With a wrench tighten the nut as follows:
(1) On tubing with diameters over 3/16 inch, tighten 1-1/4 turns.
(2) On tubing with 1/16, 1/8 or 3/16 inch diameter tighten 3/4 of a turn.
D. Unscrew the nut to release the ferrule tube assembly from the tool.
E. The assembly is installed on the fitting as follows:
(1) Slide tube in fitting until it bottoms, turn nut to finger tight position, and tighten one quarter
turn with wrench.
(2) Snug slightly with wrench.
APPLICATION OF TEFLON TAPE THREAD SEALANT.
All male pipe (tapered) threads of the oxygen system should be sealed with 3M No. 48 teflon tape. Teflon
tape should not be used on straight threads. Do not use any other lubricants in place of the teflon or on any
other threads.
1. Wrap tape on the threads, starting with those farthest from the opening, in the direction of the thread
spiral. Circle the threads, making sure that each side of the tape has a slight overlap.
2. Wrap the tape such that is does not extend beyond the last thread on the fitting at the opening. The tape
should then be pulled till it separates. Do not cut the tape, it will not stick properly.
CHART 3502. OXYGEN SYSTEM LIMITS
PARTS INSPECTION OVERHAUL
Regulator 300 Flight Hrs. 5 Years
Pressure Gauge 300 Flight Hrs. Replace on Condition
High Pressure Lines 300 Flight Hrs. Replace on Condition
Low Pressure Lines 300 Flight Hrs. Replace on Condition
Outlets 300 Flight Hrs. Every 5 Years
1
External Recharge Valve Each Use Every 5 Years
2
Masks Each Use Replace as Necessary
NOTES:
1 On condition replace the rubber components in the assembly or replace assembly.
2 If the screen in front of valve is dirty, replace valve. Valve replacement is recommended for every 5 years.
35-10-05
Page 35-11
Added: November 6, 1979
2H9
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
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