W DOC AIRBUS | AMM A320F

Replenishment of the MLG Torque Link Damper

TASK 12-12-32-611-006-A
Replenishment of the MLG Torque Link Damper

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
  • THE FLIGHT CONTROLS
  • THE FLIGHT CONTROL SURFACES
  • THE LANDING GEAR AND THE RELATED DOORS
  • COMPONENTS THAT MOVE.
MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.
WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 731
ZONE: 741
FIN: 2823GM
FIN: 2824GM
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
CONTAINER 3 L(3/4 USGAL)
No specific
AR
GROUND POWER CART-HYDRAULIC
No specific
AR
HOSE - BLEED
No specific
AR
LOCALLY MANUFACTURED - ANTAGONISTIC CONNECTOR
No specific
AR
SAFETY BARRIER(S)
No specific
AR
SPATULA - NON METALLIC
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 0.22 and 0.17 m.daN (19.47 and 15.04 lbf.in ) T
No specific
Torque wrench: range to between 0.67 and 0.57 m.daN (59.29 and 50.44 lbf.in ) T
460006804
1
BLEED ADAPTOR
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.02ABA1)
Phosphate Ester Hydraulic Fluid-General Power - -
(Material No.06AAB1)
Polysulfide Sealant-General Purpose Fillet -
(Material No.08BBF1)
Non Aqueous Cleaner_- Methyl-Ethyl-Ketone -
(Material No.14QFB1)
Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(Material No.14SBA1)
Textile-Lint free Cotton -
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
731
L.H MAIN GEAR
741
R.H MAIN GEAR
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 29-00-00-910-002-A
Safety Procedures of the Hydraulic System
TASK 32-00-00-481-001-A
Installation of the Safety Devices on the Landing Gears
F Torque Link Damper ** ON A/C NOT FOR ALL
F Torque Link Damper ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 12-12-32-941-067-A
A. Safety Precautions
   (1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
   (2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
   (3) On the panel 400VU:
  • make sure that the landing-gear control-lever 6GA is in the DOWN position
  • put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear.
4. Procedure
Subtask 12-12-32-611-054-A
A. Replenishment of the MLG Torque Link Damper
F Torque Link Damper ** ON A/C NOT FOR ALL
F Torque Link Damper ** ON A/C NOT FOR ALL
WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
   (1) Remove the sealant from the bleed screw (1) and the bleed plug (2) with the SPATULA - NON METALLIC.
   (2) Remove and discard the lockwire from the cap assembly (6) and the bleed screw (1).
   (3) Clean the items that follow with Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner_- Methyl-Ethyl-Ketone - (Material No.08BBF1) :
  • The bleed screw (1)
  • The bleed plug (2)
  • The bleed plug housing (8).
   (4) Remove the cap assembly (6) and the bleed screw (1).
   (5) Install the 460006804 BLEED ADAPTOR to the bleed plug (2).
   (6) Install the HOSE - BLEED on the 460006804 BLEED ADAPTOR.
   (7) Put a CONTAINER 3 L(3/4 USGAL) below the bleed hose.
   (8) Open the bleed plug (2).
   (9) Install a LOCALLY MANUFACTURED - ANTAGONISTIC CONNECTOR to the check valve (7).
   (10) Connect a GROUND POWER CART-HYDRAULIC or a hydraulic source (minimum supply pressure 3.45 bar (50 psi)) that contains Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) , to the approved AN connector.
   (11) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
   (12) Supply hydraulic fluid, at a pressure of between 2.42 bar (35 psi) and 2.75 bar (40 psi), to the check valve (7).
   (13) Keep the hydraulic pressure until you get an air-free flow of fluid from the bleed plug (2).
   (14) Increase the pressure of the hydraulic fluid to between 2.75 bar (40 psi) and 3.45 bar (50 psi).
   (15) Close the bleed plug (2).
   (16) Make sure that the reservoir-can (4) moves between 1.5 mm (0.06 in.) and 3.1 mm (0.12 in.) above the FULL level indicator line.
   (17) Keep the hydraulic pressure for a time of 3 minutes. During the 3 minutes make sure that:
  • No external leakage of fluid occurs
  • The reservoir-can (4) does not move.
   (18) If there is leakage and/or the reservoir-can (4) moves:
  • Slowly open the bleed plug (2) to release the hydraulic pressure
  • Do steps (9) thru (14) again.
   (19) Decrease the hydraulic pressure to zero. Disconnect the hydraulic ground cart or the hydraulic source and the approved AN connector from the check valve (7).
   (20) Measure the quantity of hydraulic fluid that comes out of the check valve (7) during a time of 15 seconds. There must be no more than 15 drops.
   (21) Open the bleed plug (2) slowly until the reservoir-can (4) becomes level with the FULL line. Close the bleed plug (2).
   (22) If the released hydraulic fluid contains air:
  • Slowly open the bleed plug (2) to release the hydraulic pressure
  • Do steps (9) thru (18) again.
   (23) Remove the bleed hose and the 460006804 BLEED ADAPTOR from the bleed plug (2).
   (24) Make sure that the parts retained from the removed component are clean and in the correct condition.
   (25) Install the cap assembly (6) on the check valve (7).
   (26) Install the bleed screw (1) in the bleed plug (2).
   (27) TORQUE the bleed screw (1) to between 0.22 and 0.17 m.daN (19.47 and 15.04 lbf.in ) T.
   (28) TORQUE the cap assembly (6) to between 0.67 and 0.57 m.daN (59.29 and 50.44 lbf.in ) T.
   (29) Safety the items that follow with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -:
  • The bleed screw (1) to the piston assembly (3)
  • The cap assembly (6) to the adjacent bolt (5).
   (30) Apply Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the items that follow:
  • The bleed screw (1)
  • The bleed plug (2)
  • The bleed plug housing (8).
5. Close-up
Subtask 12-12-32-942-066-A
A. Removal of Equipment
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Remove the SAFETY BARRIER(S).
   (3) Remove the WARNING NOTICE(S).
   (4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
[Rev.10 from 2021] 2026.04.01 12:30:03 UTC
"Aviabrain" 2025