Installation of the Torque Link Assy

TASK 32-21-27-400-001-A
Installation of the Torque Link Assy

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: 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. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 7.5 and 6.0 m.N (66.37 and 53.10 lbf.in )
No specific	Torque wrench: range to between 8.5 and 7.0 m.N (75.22 and 61.95 lbf.in )
No specific	Torque wrench: range to between 20 and 17 m.N (14.75 and 12.54 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03GBB1)	Synthetic Oil base Grease-General Purpose Clay Thickened -
(Material No.03GBC1)	Synthetic Oil base Grease-General Purpose Lithium Thickened Low Temp. -
(Material No.03HBD9)	Synthetic Ester base Grease-General Purpose Low Temp -
(Material No.06ABA1)	Polysulfide Sealant-Fuel Tank Brushable -
(Material No.06LDG2)	Non Hardening Jointing Putty-High Temp. Area - Structure
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.08BBB1)	Non Aqueous Cleaner-- Petroleum Based -

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
154	COTTER PIN	AIPC 32-21-11-03-040
67	COTTER PIN	AIPC 32-21-11-10-060
142	LOCKWASHER	AIPC 32-21-11-11-080
140	COTTER PIN	AIPC 32-21-11-12-080
154	COTTER PIN	AIPC 32-21-11-32-050
142	LOCKWASHER	AIPC 32-21-11-51-470
140	COTTER PIN	AIPC 32-21-11-52-080
67	COTTER PIN	AIPC 32-21-11-90-240
142	LOCKWASHER	AIPC 32-21-11-91-470
140	COTTER PIN	AIPC 32-21-11-92-080
29	COTTER PIN	AIPC 32-21-13-12-100
29	COTTER PIN	AIPC 32-21-13-22-100

D. Referenced Information

REFERENCE	DESIGNATION
TASK 07-11-00-581-003-A	Lifting of the Aircraft at the Forward Jacking Point, MLG Wheels on the Ground
TASK 07-11-00-586-001-A	Lowering of the Aircraft at Forward Jacking Point, MLG Wheels on the Ground
TASK 32-21-00-200-804-A	Check of Plays at Upper and Lower Torque-Link Hinges
TASK 32-21-27-400-002-A	Installation of the Torque-Link Center Hinge
TASK 32-31-00-720-003-A	Functional Test of the Normal Extension and Retraction of the Nose Landing Gear
TASK 32-31-73-200-002-A	Inspection of the NLG Proximity Sensor and Target Clearances
TASK 32-41-12-000-001-A	Removal of the NLG Wheel
TASK 32-41-12-400-001-A	Installation of the NLG Wheel
TASK 32-51-00-720-003-A	Functional Test of the Nose Wheel Steering with the Handwheel
TASK 12-22-00-00	LUBRICATION - DESCRIPTION AND OPERATION
Nose Gear Torque Links - Lower Hinge ** ON A/C NOT FOR ALL
Nose Gear Torque Links - Lower Hinge ** ON A/C NOT FOR ALL
Bulkhead Union ** ON A/C NOT FOR ALL
Plug ** ON A/C NOT FOR ALL
Nose Gear Torque Links - Upper Hinge
Nose Gear Torque Links - Target Support ** ON A/C NOT FOR ALL
Nose Gear Torque Links - Target Support ** ON A/C NOT FOR ALL
Nose Gear Torque Links - Target Support ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 32-21-27-860-051-A

A. Aircraft Maintenance Configuration
(1) In the cockpit, on the panel 400VU, make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate the landing gear control lever.
(2) On the steering handwheels (CAPT and F/O) and on the brake pedals, make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate them.
(3) Make sure that the SAFETY BARRIER(S) are in position.
(4) On the panel 110VU, make sure that the PARK BRK control switch is in the OFF position.
(5) Make sure that the wheels chocks are in position.
(6) Make sure that the aircraft is on jacks at the forward jacking point (Ref. AMM TASK 07-11-00-581-003).
(7) Make sure that a wheel is removed from the nose landing gear (Ref. AMM TASK 32-41-12-000-001) (not necessary for Upper Arm removal).

4. Procedure
Subtask 32-21-27-110-050-A

A. Preparation of the Replacement Component
(1) Remove the outer protections from the arms of the torque links. Clean them with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) and dry them with filtered compressed air.
(2) Install the grease nipples on the new torque links with the washers of the removed torque links.
(3) Before installation, clean all the parts with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(4) Make sure that the parts retained are in the correct condition. Replace all the faulty parts.
(5) Apply a light coat of Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) or Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) or Synthetic Oil base Grease-General Purpose Lithium Thickened Low Temp. - (Material No.03GBC1) to the bushes and the shafts.

NOTE: For lubricant grease specification and lubrication requirements, refer to (Ref. AMM D/O 12-22-00-00).

Subtask 32-21-27-420-050-N

B. Installation of the Torque Link Assy

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

(1) Installation of the lower arm (150):

Nose Gear Torque Links - Lower Hinge ** ON A/C NOT FOR ALL

(a) Put the stop (25) in position on the lower arm (150) of the torque links.
(b) Install the washers (26), bolts (27), washers (24) and nuts (23).
(c) Tighten the nuts (23).
(d) Put the lower arm (150) in position and align the bores of the lower arm (150), the lower bracket and the washers (20) and (21).
(e) Install the lower shaft (31).
(f) Engage the screw (22) with the screw head up.
(g) Install the support (28).
(h) Install the nut (30).
(i) TORQUE the nut (30) to between 20 and 17 m.N (14.75 and 12.54 lbf.ft )

.
(j) Safety the nut (30) with the new AIPC 32-21-13-12-100 COTTER PIN (29) or AIPC 32-21-13-22-100 COTTER PIN (29).
(2) Do one of the two steps that follow to install the plug (155) or (158) to the support (28):

Bulkhead Union ** ON A/C NOT FOR ALL

Plug ** ON A/C NOT FOR ALL

(a) Install the plug (155) or (158) with the self-locking nut (153) as follows:
1 Install the washer (156) and the bolt (157) through the plug (155) or (158) and the support (28).
2 Install the washer (152) and the self-locking nut (153).
3 Tighten the self-locking nut (153).
4 Apply a bead of Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) around the joint between the sliding rod and plug (155) or (158).
(b) Install the plug (155) or (158) with the nut (153) and the cotter pin (154) as follows:
1 Install the washer (156) and the bolt (157) through the plug (155) or (158) and the support (28).
2 Install the washer (152) and the nut (153).
3 Tighten the nut (153).
4 Safety the nut (153) with the new AIPC 32-21-11-32-050 COTTER PIN (154) or AIPC 32-21-11-03-040 COTTER PIN (154).
5 Apply a bead of Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) around the joint between the sliding rod and plug (155) or (158).
(3) Installation of the upper arm (151):

Nose Gear Torque Links - Upper Hinge

(a) Put the support (65) in position on the upper arm (151) of the torque links.
(b) Install the screw (60), the washers (61) and (66) and the nut (68).
(c) Put the stop (64) in position on the support (65).
(d) Install the screws (62), the washers (63) and (66) and the nuts (68).
(e) TORQUE the nuts (68) to between 7.5 and 6.0 m.N (66.37 and 53.10 lbf.in )

.
(f) Safety the nut (68) with the new AIPC 32-21-11-10-060 COTTER PIN (67) or the AIPC 32-21-11-90-240 COTTER PIN (67).
(g) Put the upper arm (151) of the torque links and the washers (69) and (70) in position.
(h) Install the upper shaft (73) and align the rigging holes.
(i) Clean the screw (74) with Non Aqueous Cleaner-General - - (Material No.08BAA9) and dry it with filtered compressed air.
(j) Apply a thin layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the screw (74).
(k) Install the screw (74) and correctly put the threads in position.
(l) Install the washer (72).
(m) Install the nut (71) but do not tighten it at this step.
(n) Apply a bead of Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) on the screw head (74) and gear leg interface.
(4) Install the target support as follows:

Nose Gear Torque Links - Target Support ** ON A/C NOT FOR ALL

(a) Put the casing (134) in position on the screw (143).
(b) Install the screw (141) and the new AIPC 32-21-11-51-470 LOCKWASHER (142) or AIPC 32-21-11-11-080 LOCKWASHER (142) or AIPC 32-21-11-91-470 LOCKWASHER (142).
(c) TORQUE the screw (141) to between 7.5 and 6.0 m.N (66.37 and 53.10 lbf.in )

and safety it with the lockwasher (142).
(d) Install the screw (133), the washers (131), the spacers (159) and the nut (130).
(e) TORQUE the nut (130) to between 7.5 and 6.0 m.N (66.37 and 53.10 lbf.in )

.
(f) Fold the tabs of the lockwasher (132) on the screw (133).
(g) Put the rod (135) in position. Install the screw (136), the washer (138) and the nut (139).

NOTE: It is permitted to install the screw (136) from the right to the left or from the left to the right.

(h) TORQUE the nut (139) to between 8.5 and 7.0 m.N (75.22 and 61.95 lbf.in )

.
(i) Safety the nut (139) with the new AIPC 32-21-11-52-080 COTTER PIN (140) or AIPC 32-21-11-12-080 COTTER PIN (140) or AIPC 32-21-11-92-080 COTTER PIN (140).
(j) Tighten the nut (71).

Nose Gear Torque Links - Upper Hinge

(5) Do a check of the plays at the upper and lower torque-link hinges (Ref. AMM TASK 32-21-00-200-804).
(6) Install the center hinge (Ref. AMM TASK 32-21-27-400-002).
(7) To install only the lower arm (150):

Do Steps B.(1), B.(2), B.(5) and B.(6).

(8) To install only the upper arm (151):

Do Steps B.(3) thru B.(6).

(9) Apply Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) to the areas shown as E.

Subtask 32-21-27-420-058-A

C. Install the wheel
(1) Install the removed wheel of the nose gear (Ref. AMM TASK 32-41-12-400-001).

Subtask 32-21-27-720-051-A

D. Test
(1) Do a functional test of the normal extension and retraction of the nose landing gear (Ref. AMM TASK 32-31-00-720-003).
(2) Do a functional test of the nose wheel steering (Ref. AMM TASK 32-51-00-720-003).
(3) Do an inspection of the NLG proximity sensor and target clearances (Ref. AMM TASK 32-31-73-200-002).

5. Close-up
Subtask 32-21-27-860-052-A

A. Put the aircraft back to its initial configuration.
(1) Lower the aircraft on its wheels (Ref. AMM TASK 07-11-00-586-001).
(2) Remove the safety barriers.
(3) Remove the WARNING NOTICE(S).
(4) Make sure that the work area is clean and clear of tools and other items.

[Rev.10 from 2021] 2026.04.01 00:42:34 UTC