W DOC AIRBUS | AMM A320F

Protection of Hydraulic Lines from Vibration and Chafing

TASK 20-23-14-910-001-A
Protection of Hydraulic Lines from Vibration and Chafing

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Consumable Materials
REFERENCE
DESIGNATION
(Material No.04SAB2)
Varnish Polyurethane-- Marking Structure
(Material No.06CMD9)
Silicone Adhesive Sealant-General Purpose One part legacy
(Material No.14RAD1)
Cord-- Synthetic fiber Dia: 2.5 mm -
(Material No.14SBA1)
Textile-Lint free Cotton -
 B. Referenced Information
REFERENCE
DESIGNATION
F Minimum Distances
F Installation of Lacing Tape on Rigid Pipe Runs
F Installation of Bumpers and Spacers between Rigid Pipes
F Installation of Clamps or Lacing Tape
F Installation of Spiral Strip
F Protection of Flexible Hoses to Prevent Chafing
3. Job Set-up
Subtask 20-23-14-910-050-A
A. Not Applicable
4. Procedure
Subtask 20-23-14-910-051-A
A. Minimum Distances Necessary to Prevent Chafing of Hydraulic Rigid Pipes/Flexible Hoses
F Minimum Distances
NOTE: Definition of rigid pipe/flexible hose routings:
Rigid pipe/flexible hose routings are a set of rigid pipes/flexible hoses which are parallel and part of the same system. For hydraulic rigid pipes, they also have the same system color code.
Usually the pipes in different routing are not parallel (example: crossing) or they can be from different hydraulic systems (different color code).
   (1) Rigid pipes and flexible hoses must not touch other rigid pipes/flexible hoses or adjacent components.
NOTE: It is permitted for hydraulic flexible hoses that have blue textile anti-abrasion-sheaths to touch each other.
   (2) The standard minimum distances that you must obey for rigid pipe/flexible hose routings are specified in this document.
  • If you cannot get the standard minimum distance, refer to the maintenance procedure or the installation drawing of the equipment to know if a specified minimum distance is applicable. It is necessary to obey this specified minimum distance.
   (3) To know the minimum distance between a rigid pipe/flexible hose and a part that can move:
  • Measure the distance in the condition where the movement decreases the distance to its smallest value.
Subtask 20-23-14-910-052-A
B. Protection from Vibration and Chafing for Hydraulic Rigid Pipes
CAUTION: DO NOT USE THE VIBRATION AND CHAFING PROTECTIONS IN THE FUEL TANK AREA. THEY ARE NOT COMPATIBLE WITH FUEL AND CAN CAUSE FOREIGN OBJECT DAMAGE (FOD) IN THE FUEL TANKS.
   (1) When the clearance is less than the minimum distance, you can use lacing tape, bumpers, spacers and clamps to prevent chafing.
   (2) If a spacer is missing, we recommend that you replace it with a pair of P-clamps NSA5516/ABS0975 or with lacing tape (P-clamps give the best protection from vibration).
   (3) It is not permitted to attach hydraulic rigid pipes (with lacing tape, bumpers, spacers and clamps) to pipes of other systems (air, fuel, water, etc.) or electrical harnesses.
   (4) To identify the location where you will attach the hydraulic rigid pipes (with lacing tape, bumpers, spacers and clamps), you can use:
  • Identification tape ABS0653-05 or NSA0144-4 or
  • Varnish Polyurethane-- Marking Structure (Material No.04SAB2) .
   (5) Installation of lacing tape on rigid pipe runs
F Installation of Lacing Tape on Rigid Pipe Runs
     (a) Clean the location of tying with Textile-Lint free Cotton - (Material No.14SBA1) .
     (b) Make the identification mark with identification tape ABS0653-05 or NSA0144-4 or with Varnish Polyurethane-- Marking Structure (Material No.04SAB2) on one rigid pipe (the largest rigid pipe if possible) only. If you select Varnish Polyurethane-- Marking Structure (Material No.04SAB2) , we recommend that you apply the identification mark after installation of the lacing tape.
     (c) Apply a layer of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) on one of the outer rigid pipes on which you will not put an identification mark.
     (d) Attach the rigid pipes with lacing tape 14RAD1Cord-- Synthetic fiber Dia: 2.5 mm - on the adhesive sealant.
     (e) Install the lacing tape between the pipes to keep the distance between the pipes constant.
     (f) Complete the lacing with a reef knot. Tighten the knot.
     (g) Apply Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) on the reef knot and the ends of the lacing tape.
     (h) Make the identification mark with Varnish Polyurethane-- Marking Structure (Material No.04SAB2) if you selected it and did not make the mark before.
   (6) Installation of bumpers and spacers between rigid pipes.
F Installation of Bumpers and Spacers between Rigid Pipes
NOTE: Bumpers or spacers can prevent vibration and chafing:
  • When the distance between attached clamps is too long and
  • To keep a minimum distance between two rigid pipes.
This procedure is applicable for installations without force.
     (a) Make the identification mark with identification tape ABS0653-05 or NSA0144-4 or with Varnish Polyurethane-- Marking Structure (Material No.04SAB2) on one rigid pipe (the largest rigid pipe if possible) only. If you select Varnish Polyurethane-- Marking Structure (Material No.04SAB2) , we recommend that you apply the identification mark after installation of bumpers and spacers.
     (b) Apply a layer of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) on one rigid pipe on which you will not put an identification mark.
     (c) Install an applicable bumper NSA5586 (or a spacer NSA5527) between the two rigid pipes.

Identification of spacers
Length of Spacer (in)
Length of Spacer (mm)
Spacer P/N
0.142
3.6
NSA5527-03-07
0.190
4.83
NSA5527-03-04
0.25
6.35
NSA5527-03-03
0.312
7.93
NSA5527-03-05
0.375
9.52
NSA5527-03-06
0.453
11.5
NSA5527-03-16
0.5
12.7
NSA5527-03-01
0.551
14
NSA5527-03-14
0.598
15.2
NSA5527-03-02
0.669
17
NSA5527-03-15
0.748
19
NSA5527-03-12
0.787
20
NSA5527-03-08
0.827
21
NSA5527-03-13
0.886
22.5
NSA5527-03-09
0.925
23.5
NSA5527-03-11
1.831
46.5
NSA5527-03-10
     (d) Install cable tie NSA935401 on the layer of adhesive sealant and on the bumper (or through the spacer) with the applicable tool:
  • You can use cable tie NSA935401-05, NSA935401-06 or NSA935401-08 (as applicable for the pipe diameter and the distance between the rigid pipes).
NOTE: The cable tie must be sufficiently tight around the rigid pipe but must not cause damage to the rigid pipe (kinks or other damage).
     (e) Make the identification mark with Varnish Polyurethane-- Marking Structure (Material No.04SAB2) if you selected it and did not make the mark before.
   (7) Installation of clamps or lacing tape to prevent chafing of rigid pipes
F Installation of Clamps or Lacing Tape
NOTE: We recommend that you use clamps in areas where there can be force and/or vibration.
     (a) Installation of clamps.
       1 Make the identification mark with identification tape ABS0653-05 or NSA0144-4 or with Varnish Polyurethane-- Marking Structure (Material No.04SAB2) on one rigid pipe (the largest rigid pipe if possible) only. If you select Varnish Polyurethane-- Marking Structure (Material No.04SAB2) , we recommend that you apply the identification mark after installation of the clamps.
       2 Find the applicable clamp installation in relation to:
  • The location of the rigid pipes
  • The distance between the rigid pipes.

Identification of the P-clamps
Rigid Pipe Size
Rigid Pipe DIA (in)
Rigid Pipe DIA (mm)
P-clamp P/N
-4
1/4
6.35
NSA5516CA06NJ or
ABS0975J04
-6
3/8
9.525
NSA5516CA11NJ or
ABS0975J06
-8
1/2
12.70
NSA5516CA14NJ or
ABS0975J08
-10
5/8
15.875
NSA5516CA18NJ or
ABS0975J10
-12
3/4
19.05
NSA5516CA23NJ or
ABS0975J12
-16
1
25.40
NSA5516CA29NJ or
ABS0975J16 (*)
-20
1 1/4
31.75
ABS0975J20
-24
1 1/2
38.10
ABS0975J24
(*) Do not use P-clamps on size -16 high-pressure rigid pipes between the engine driven pump and the high-pressure manifold (pump delivery line).
       3 Install the clamps on the rigid pipes with the related hardware.
       4 Make the identification mark with Varnish Polyurethane-- Marking Structure (Material No.04SAB2) if you selected it and did not make the mark before.
     (b) Installation of lacing tape.
       1 Clean the location of tying with Textile-Lint free Cotton - (Material No.14SBA1) .
       2 Make the identification mark with identification tape ABS0653-05 or NSA0144-4 or with Varnish Polyurethane-- Marking Structure (Material No.04SAB2) on one rigid pipe (the largest rigid pipe if possible) only. If you select Varnish Polyurethane-- Marking Structure (Material No.04SAB2) , we recommend that you apply the identification mark after installation of the lacing tape.
       3 Apply a layer of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) on one rigid pipe on which you will not put an identification mark.
       4 Install the lacing tape 14RAD1Cord-- Synthetic fiber Dia: 2.5 mm - on the adhesive sealant and the two rigid pipes.
       5 Install the lacing tape between the pipes to keep the distance between the pipes constant.
       6 Complete the lacing with a knot. Tighten the knot.
       7 Apply Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) on the knot and the ends of the lacing tape.
       8 Make the identification mark with Varnish Polyurethane-- Marking Structure (Material No.04SAB2) if you selected it and did not make the mark before.
   (8) Installation of spiral strip.
F Installation of Spiral Strip
NOTE: If a rigid pipe is too near to a part that cannot move (distance of less than 5 mm (0.20 in.)):
  • You can install a spiral strip attached with a cable tie on each end of the rigid pipe to prevent damage.
    This procedure is not applicable for parts that can move.
     (a) Wind a spiral strip NSA849000 around the rigid pipe.
     (b) Install cable tie NSA935401 on each end of the spiral strip.
     (c) Make sure that the minimum distance is not less than 1.5 mm (0.06 in.).
Subtask 20-23-14-910-054-A
C. Protection from Vibration and Chafing for Hydraulic Flexible Hoses
F Protection of Flexible Hoses to Prevent Chafing
NOTE: When the clearance between the hydraulic flexible hoses and all the other parts is less than the minimum distance, you can attach the flexible hoses together with lacing tape to prevent chafing.
NOTE: It is not permitted to attach the hydraulic flexible hoses to:
  • Pipes of other systems (air, fuel, water, etc.) or electrical harnesses
  • Rigid pipes
  • Flexible hoses that are part of the pump delivery lines, because of the effect of vibrations.
If there is a problem which is different from the given criteria, contact Airbus for a special decision.
   (1) Attach the flexible hoses with lacing tape 14RAD1Cord-- Synthetic fiber Dia: 2.5 mm -.
   (2) Install the lacing tape between the pipes to keep the distance between the pipes constant.
   (3) Complete the lacing with a reef knot and tighten the knot.
   (4) Apply Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) on the knot and the ends of the lacing tape 14RAD1Cord-- Synthetic fiber Dia: 2.5 mm -.
[Rev.10 from 2021] 2026.03.31 22:59:40 UTC
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