(6)
The sixth task is the spacing between tubing clamps.
B. This procedure is used to remove and install all flareless tubing. The tubing assembly configuration and the tubing material must be identified before removal.
C. When you disconnect the tubing, always use the necessary precautions to prevent leakage of fluids. If fluids fall on the airplane, identify the fluid and clean the area as specified for that fluid (Ref Chapter 12, Clean and Polish).
D. When you remove, install, or do work with hydraulic tube assemblies, obey the guidelines that follow:
(1)
When you remove tubes make sure the tubes and port fittings have tags that identify the correct connection locations.
(2)
Do not move or change the tube bends. If you move or change a bend in the tube, these bad effects can occur:
(a)
If you move or change a bend in the tube, it can become possible that the tube will align with the incorrect port. If this occurs, incorrect reconnection or cross-connection of the tubes can become possible,
(b)
If you move or change a bend in the tube, it can become possible that the tube will have too much stress when it is connected. Stress can cause cracks in the tubes.
E. You can use the nuts and fittings again if the seal areas give a good seal on the assembly. Also, you can use the nuts and fittings again if they are not damaged. The threads on the nuts and fittings must turn smoothly.
F. Flareless BACS13AP sleeves that are not correctly set can cause leaks. We recommend that you set flareless sleeves by machine. Set the flareless sleeves by hand only when you cannot set them by machine.
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757
MAINTENANCE MANUAL
G. When you install the tubing, align the fittings and tubing. Tighten the B-nuts with your hand before you tighten them with a wrench. Do not use a wrench on the B-nuts to align the tubing and connections or you will cause damage to the threads.
NOTE: If you use the nut to increase the length or to align the tubing,
____ move the sleeve until it touches the mating surface. Leakage from the fittings or the tubing can occur if you cause damage to the fittings or the tubing.
TASK 20-10-09-004-001
2. Flareless Tubing Assembly - Removal___________________________________
A. Procedure
S 034-002
WARNING: REFER TO THE APPLICABLE MAINTENANCE INSTRUCTIONS AND REMOVE ALL
_______ PRESSURE FROM THE SYSTEM BEFORE YOU START THE REMOVAL OF THE FLARELESS TUBING ASSEMBLY. A PRESSURIZED SYSTEM CAN CAUSE INJURY OR DAMAGE.
(1) Remove the support clamps on the tubing you will remove and on the adjacent tubing assemblies if it is necessary.
S 804-043
WARNING: MAKE SURE EACH TUBE AND THE PORT FITTINGS HAVE TAGS TO IDENTIFY
_______ THE CORRECT CONNECTION LOCATIONS. IF YOU DO NOT PUT TAGS ON THE TUBES AND PORT FITTINGS, INCORRECT RECONNECTION OR CROSS-CONNECTION OF THE TUBES CAN BECOME POSSIBLE. IF THIS OCCURS, UNINTENTED OPERATION OR MALFUCTION OF AIRPLANE SYSTEMS CAN RESULT AND CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(2)
Install tags on the tubes and on the port fittings to clearly identify the correct connection locations.
(3)
Loosen the adjacent tubing assemblies and clamps if it is necessary.
(4)
Remove the tubing assembly from the airplane.
S 034-003
S 024-004
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A
757 MAINTENANCE MANUAL
S 434-005
CAUTION:_______KEEP THE HYDRAULIC LINES AND FITTINGS SEALED WITH CAPS. DIRT OR UNWANTED MATERIALS CAN CAUSE CONTAMINATION OF HYDRAULIC LINES, DAMAGE TO SYSTEM COMPONENTS, AND LEAKAGE OF HYDRAULIC FLUID CAN OCCUR.
REMOVE THE HYDRAULIC FLUID THAT FALLS ON THE AIRPLANE SURFACES. HYDRAULIC FLUID CAN DAMAGE THE AIRPLANE.
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