Installation of the NLG Wheel

TASK 32-41-12-400-001-A
Installation of the NLG Wheel

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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.

ZONE: 711
FIN: 2659GM
FIN: 2660GM

1. Reason for the Job
If you remove the NLG wheel when you do the TSM TASK 32-20-00-810-802-A "Vibration Felt on the NLG during Takeoff and Lift Off Phases", we recommend that you replace the two NLG wheels.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	AIR SOURCE FILTERED, DRY
No specific	AR	CHOCK - WHEEL(S)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in )
No specific	Torque wrench: range to between 0.51 and 0.4 m.daN (45.13 and 35.40 lbf.in )
No specific	Torque wrench: range to between 11.34 and 10.26 m.daN (83.63 and 75.66 lbf.ft )
No specific	Torque wrench: range to between 22.89 and 20.71 m.daN (168.81 and 152.73 lbf.ft )
1324A	1	HANDLING TOOL
J47548	1	PROTECTOR NLG
J47549	1	ADAPTOR NLG

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03GBB1)	Synthetic Oil base Grease-General Purpose Clay Thickened -
(Material No.03GCB1)	Synthetic Oil base Grease-Landing Gear Wheel Bearing Lithium Thickened -
(Material No.06LCG9)	Non Hardening Jointing Putty-Medium Temp. Area - -
(Material No.08BBB1)	Non Aqueous Cleaner-- Petroleum Based -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
711	NOSE GEAR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
4	COTTER PINS	AIPC 32-21-13-12-060
3	NUTS	AIPC 32-21-13-12-070
4	COTTER PINS	AIPC 32-21-13-22-060
3	NUTS	AIPC 32-21-13-22-070

E. Referenced Information

REFERENCE	DESIGNATION
TASK 07-12-00-582-001-A	Jacking of the Nose Landing Gear
TASK 12-14-32-614-001-A	Nitrogen Filling of the Tires
TASK 32-00-00-081-001-A	Removal of the Safety Devices from the Landing Gears
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 32-41-00-210-003-A	Functional Check of Tire Pressures
TASK 32-41-00-910-001-A	Tire Mixability Precautions
TASK 12-22-00-00	LUBRICATION - DESCRIPTION AND OPERATION
Nose Gear Wheel

3. Job Set-up
Subtask 32-41-12-865-051-A

A. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY	4GG	M36
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/CTL	3GG	M35
121VU	HYDRAULIC/BRAKING AND STEERING/SYS1/CTL	1GG	M34
121VU	HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY	2GG	M33

Subtask 32-41-12-860-055-B

B. Aircraft Maintenance Configuration
(1) Make sure that the CHOCK - WHEEL(S) are in position at the MLG.
(2) Make sure that the NLG is in the correct configuration for the wheel change (Ref. AMM TASK 07-12-00-582-001).
(3) Make sure that the WARNING NOTICE(S) is on right center instrument-panel 400VU to tell persons not to operate the landing gear.
(4) Make sure that the safety devices are installed on the landing gear (Ref. AMM TASK 32-00-00-481-001).

4. Procedure

NOTE: If the NLG wheel has a pressure-sensor seal cap, make sure that the seal cap is correctly installed and safetied with a nut and a cotter pin.

NOTE: If the NLG wheel has a Tire Pressure Indicating System (TPIS), the tie-bolt balance weight must be installed 180 degrees from the TPIS sensor holder.

NOTE: If the aircraft has the TPIS, install the TPIS balance weight, refer to the NLG wheel Component Maintenance Manual (CMM). If the aircraft has no TPIS, no TPIS balance weight is necessary.

Subtask 32-41-12-210-054-A

A. Tires of different type
(1) Obey the tire mixability precautions (Ref. AMM TASK 32-41-00-910-001).

Subtask 32-41-12-420-053-A

B. Installation of the NLG Wheel
(1) Preparation for installation:
(a) It is not permitted to use tires of different types, make sure that:

The NLG wheel you install has the same type of tire (radial or cross-ply) as the other NLG wheel.

(b) Clean the axle sleeve (1) with the Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) and dry it with AIR SOURCE FILTERED, DRY.
(c) Make sure that the axle sleeve (1) is in the correct condition.
(d) Remove the J47548 PROTECTOR NLG.
(e) Make sure that the retaining ring (11) is in its housing.
(f) Install the J47548 PROTECTOR NLG.
(g) Apply a thin layer of Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) or Synthetic Oil base Grease-Landing Gear Wheel Bearing Lithium Thickened - (Material No.03GCB1) on the axle sleeve (1) and the threads of the axle.

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

(h) Do a visual inspection of the hubcap (6) to make sure that it is in the correct condition and serviceable.
1 If you find damage, refer to the applicable CMM for damage limits and repair procedures.
(2) Installation of the NLG wheel:
(a) Clean the inner surface of the NLG wheel bearings (surface that touches the axle). Do not apply grease on these surfaces.
(b) Install the NLG wheel with the 1324A HANDLING TOOL and make sure that the valve is outboard.

NOTE: The 1324A HANDLING TOOL is optional, but Airbus recommends to use this tool during installation of the NLG wheel.

(c) Remove the J47548 PROTECTOR NLG.
(d) Install the axle nut (10).
(e) Use the J47549 ADAPTOR NLG to TORQUE the axle nut (10) to between 22.89 and 20.71 m.daN (168.81 and 152.73 lbf.ft )

while you turn the NLG wheel in the same direction.
(f) Loosen the axle nut (10).
1 Make sure that the NLG wheel does not turn when you loosen the axle nut (10).

CAUTION: MAKE SURE THAT YOU ALIGN THE NUT HOLE WITH THE SUBSEQUENT AXLE HOLE (WITH THE SMALLEST POSSIBLE ROTATION ANGLE). IF YOU DO NOT OBEY THIS INSTRUCTION, THERE IS A RISK THAT YOU TIGHTEN THE AXLE NUT TOO MUCH AND CAUSE DAMAGE TO THE EQUIPMENT.

(g) Use the J47549 ADAPTOR NLG to TORQUE the axle nut (10) to between 11.34 and 10.26 m.daN (83.63 and 75.66 lbf.ft )

while you turn the NLG wheel in the same direction.
(h) Tighten the axle nut (10) until one hole is aligned with the first subsequent hole in the axle.
(i) Turn the NLG wheel and make sure that the NLG wheel is installed correctly.
(j) Install the casing (9).
(k) Installation of the bolts:

CAUTION: MAKE SURE THAT YOU INSTALL THE BOLT AGAINST THE INNER SIDE OF THE AXLE NUT, AND THE WASHERS AND NUTS AGAINST THE OUTER SIDE OF THE AXLE NUT. IF YOU DO NOT, YOU CAN CAUSE DAMAGE TO THE NOSE WHEEL.

1 Install the bolts (5), washers (2) and new AIPC 32-21-13-12-070 NUTS (3) or new AIPC 32-21-13-22-070 NUTS (3).
(l) TORQUE the nuts (3) to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in )

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.

(m) Safety the nuts (3) with the new AIPC 32-21-13-12-060 COTTER PINS (4) or the new AIPC 32-21-13-22-060 COTTER PINS (4).

Subtask 32-41-12-410-051-A

C. Close access
(1) Put the hubcap (6) in position.
(2) Apply a thin layer of Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) to the screws (7).
(3) Install the screws (7) and the washers (8).
(4) TORQUE the screws (7) to between 0.51 and 0.4 m.daN (45.13 and 35.40 lbf.in )

NOTE: The hubcap attachment holes have screw-lock inserts. It is not necessary to install lockwire on the screws (7).

Subtask 32-41-12-860-051-A

D. Aircraft Maintenance Configuration
(1) Inflate the tire to the unloaded pressure (Ref. AMM TASK 12-14-32-614-001).
(2) Lower the aircraft on its NLG wheel (Ref. AMM TASK 07-12-00-582-001).
(3) Make sure that the pressure of the tire is correct (Ref. AMM TASK 32-41-00-210-003).

Subtask 32-41-12-865-052-A

E. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY	4GG	M36
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/CTL	3GG	M35
121VU	HYDRAULIC/BRAKING AND STEERING/SYS1/CTL	1GG	M34
121VU	HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY	2GG	M33

5. Close-up
Subtask 32-41-12-942-051-A

A. Removal of the Equipment
(1) Remove the safety devices from the landing gears (Ref. AMM TASK 32-00-00-081-001).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 00:47:16 UTC