-
the tubes must go freely into the fittings.
If a tube does not go freely into a fitting (not circular, out of
tolerance), do not install the fitting.
The surfaces must be clean and without damage:
-
the swaging area must have no deep scratches and must be clean (no dust, particles of metal, etc.). Before you swage, clean the end of the tube with a clean cloth.
(1) Apply a layer of COMMON GREASE (Material No. 04-012) into the tube end to swage.
NOTE : Put the sleeve nut in position on the tube before you install
____
the sleeve.
(2) Bond the sleeve or the union on the tube.
(a)
Clean the external surface of the tube end with CLEANING AGENTS (Material No. 11-003).
(b)
Application of activator
1 Mask the tube ends to prevent contamination.
_
2 Apply BONDING AND ADHESIVE COMPOUNDS (Material No. 08-009)
_ with a brush in the area where you swage.
NOTE : If the product is supplied in an aerosol can, spray it
____
on.
3 Apply BONDING AND ADHESIVE COMPOUNDS (Material No. 08-009) to
_ the internal side of the union that you must swage.
4 Remove the unwanted material.
_
5 Stop for 10 minutes.
_
(c) Apply BONDING AND ADHESIVE COMPOUNDS (Material No. 08-024) to the end of the tube that you must swage and make sure it does not go into the tube.
NOTE : Apply sufficient material to the surfaces that you must
____
seal.
(d)
Use force to install the union on the tube and turn the tube.
(e)
Equally apply BONDING AND ADHESIVE COMPOUNDS (Material No. 08-024).
(f)
Remove the unwanted material when the union is fully installed on the tube.
NOTE : Swage the tube before the bonding and adhesive compounds
____
are dry.
Subtask 20-23-38-320-054
F. Swage the Tube
(1)
Put the tube assembly with the sleeve (or the union) on the drawbar and the die. Fully push the tube and the sleeve (or the union) into the swage tool. (Ref. Fig. 211/TASK 20-23-38-991-022)
(2)
Install the two jaws on the die and the tube assembly.
(3)
Lock the attach nut.
(4)
Tighten the two nuts and make sure that the threads do not cross. TORQUE the nuts to to 3 m.daN (22.12 lbf.ft).
(5)
Tighten the valve installed on the right side of the gage.
(6)
Slowly operate the pump until you obtain the specified pressure: (Ref. Fig. 214/TASK 20-23-38-991-023)
(7)
Loosen the valve installed on the right side of the gage.
Swage Pressure with Hand Swager Models 5175 and 5720 for 855010 and 855034.
Figure 214/TASK 20-23-38-991-023
(8) Remove the tube from the swage tool.
NOTE : Wait for 24 hours before you do the pressure test or degrease
____
the tube.
(9) Clean the tube.
WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL
_______ MATERIALS ONLY WITH A GOOD SUPPLY OF AIR. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.
(a) Carefully clean the tube with CLEANING AGENTS (Material No. 11-003).
Subtask 20-23-38-220-051
G. Do the Check of the Swage
(1) Make sure that the swage obeys the dimension acceptance criteria. (Ref. Fig. 215/TASK 20-23-38-991-021, 216/TASK 20-23-38-991-052, 217/TASK 20-23-38-991-026)
(a)
You must reject the swage if:
-
the diameters D1, D2 or D3 are higher than the maximum tolerance
-
the wave deformations A2 are higher than the maximum tolerance
-
the dimension B is lower than the minimum tolerance.
(b)
You can re-swage the tube if:
-the wave deformations A or the diameters D1, D2 or D3 are lower than the minimum tolerance.
NOTE : To re-swage, you can increase the maximum swaging pressure
____
to plus 10 %.
(c) You can remove material from the end of the tube if:
-the tube is too long and you cannot install it.
NOTE : Do not decrease the dimension B more than 0.5 +0 +0.5 mm
____
(0.02 +0.00 +0.02 in.).
Dimension Acceptance Criteria for NSA 855012 Sleeves
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：A320飞机维护手册 AMM STANDARD PRACTICES-AIRFRAME(66)
