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NOTE: Flexible hose assemblies are used in the high and low
____ pressure systems and can be connected to standard tubing connectors. Low pressure hoses operate at pressures of 100 psi and must not be installed in the high pressure system. High pressure can be greater than 1850 psi.
S 412-073
(19) Do not permit the oxygen hoses to twist, kink, or collapse.
S 212-078
CAUTION: MAKE SURE THAT LOOSE FLEXIBLE OXYGEN HOSES ARE SECURED WITH
_______ CLAMP(S). IF THE FLEXIBLE OXYGEN HOSE IS NOT INSTALLED IN THE CLAMP, DAMAGE TO THE FLEXIBLE OXYGEN HOSE CAN OCCUR.
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(20) Make sure that loose flexible oxygen hoses are secured in their clamp(s) to maintain a positive separation from structures or electrical wiring or equipment.
E. Procedure - General Maintenance Data
S 792-065
(1) Do the leak detection procedure:
(a) Use an approved leak detection compound to find small leaks.
1) Apply the approved leak detection compound with a soft brush on the connections that you think are a source of leaks.
2) Examine all the connections for bubbles. 3) Use a mirror and a light when necessary to examine areas that are not easy to see. 4) Rub off leak detection compound with a clean cloth immediately after the test.
S 392-066
(2) Seal the pipe thread with teflon tape, if it is necessary:
(a) Apply tape to the external threads.
NOTE: Do not apply the teflon to the last 1 1/2 to 2 1/2
____ threads at the end of the fitting.
(b) Apply 1-1/2 turns of the teflon tape, pulled tight, to the pipe threads. Make sure the teflon tape does not have an overlap with the internal fitting end.
F. Procedure - Oxygen System Maintenance Practices
S 912-067
(1) Prepare for maintenance as follows:
(a)
Obey the safety precautions before you do the maintenance.
(b)
Clean all tools, equipment, and fittings before you do the maintenance.
(c)
Put on clean gloves and clean clothing during the maintenance.
CAUTION:_______DO NOT TIGHTEN THE OXYGEN CYLINDER VALVE TOO MUCH. DAMAGE TO THE VALVE CAN OCCUR IF YOU TIGHTEN IT TOO MUCH.
(d)
Tighten the oxygen cylinder valve with your hand.
NOTE: Do not tighten the oxygen cylinder valve more than 25
____
pound-inches.
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TUBE AND SLEEVE ARE ALIGNED
AND ENGAGED AT THE END OF THE FITTING
Tube and Fitting Installation
Figure 201
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RETAINING DEVICE
COUPLING CROSS SECTION
Quick-Disconnect Coupling Installation Figure 202
C80985
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WARNING:_______LOOSEN THE CONNECTIONS CAREFULLY. THE REMAINING OXYGEN CAN RELEASE WITH A LARGE FORCE AND CAUSE THE TEMPERATURE TO INCREASE. THIS CAN START AN IGNITION WITH THE OXYGEN AND CAUSE INJURY TO PERSONS AND DAMAGE TO THE AIRPLANE AND EQUIPMENT.
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