Lubrication of Main Landing Gear and Doors

TASK 12-22-32-640-001-A
Lubrication of Main Landing Gear and Doors

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

ZONE: 731
ZONE: 734
ZONE: 741
ZONE: 744

1. Reason for the Job
Refer to the MPD TASK: 321000-01
LUBRICATION OF MAIN LANDING GEAR AND DOORS
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	1	LUBRICATING EQUIPMENT
No specific	AR	SAFETY BARRIER(S)
No specific	1	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -
(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.03GBD1)	Synthetic Oil base Grease-General Purpose Lithium Thickened -
(Material No.03HBD9)	Synthetic Ester base Grease-General Purpose Low Temp -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.08BBB1)	Non Aqueous Cleaner-- Petroleum Based -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
731	L.H MAIN GEAR
734	MAIN DOOR
741	R.H MAIN GEAR
744	MAIN DOOR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 32-00-00-481-002-A	Installation of the Safety Devices on the Landing Gear Doors
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
TASK 12-22-00-00	LUBRICATION - DESCRIPTION AND OPERATION
MLG Door and Uplocks - Lubrication Points
MLG - Lubrication Points ** ON A/C NOT FOR ALL
MLG - Lubrication Points ** ON A/C NOT FOR ALL
MLG - Lubrication Points ** ON A/C NOT FOR ALL
MLG - Lubrication Points ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 12-22-32-941-050-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 installed 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) Put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear doors.

Subtask 12-22-32-010-050-A

B. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position adjacent to the applicable MLG.
(2) Open the applicable MLG door (Ref. AMM TASK 32-12-00-010-001).
(3) Make sure that the safety device is installed on the applicable MLG door actuating-cylinder (Ref. AMM TASK 32-00-00-481-002).

Subtask 12-22-32-640-055-A

C. Preparation of the Equipment
(1) Make sure that the LUBRICATING EQUIPMENT is in the correct condition before you fill it.
(2) Operate the LUBRICATING EQUIPMENT to make sure that the lines and adaptor are full of new lubricant.

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

(3) Clean the greasers with a clean Textile-Lint free Cotton - (Material No.14SBA1) and Non Aqueous Cleaner-General - - (Material No.08BAA9) .

4. Procedure
Subtask 12-22-32-640-051-J ** ON A/C NOT FOR ALL

CAUTION: DO NOT OPERATE POWER-OPERATED LUBRICATION EQUIPMENT AT MORE THAN 207 bars (3000 psi). HIGH LUBRICATION PRESSURE CAN CAUSE DAMAGE TO THE AIRCRAFT.

CAUTION: FOR LUBRICATION OF THE GLAND HOUSING ON THE LANDING GEAR BOTTOM-BEARING, USE ONLY HAND-OPERATED LUBRICATION EQUIPMENT. POWER-OPERATED LUBRICATION EQUIPMENT CAN CAUSE EXTRUSION OF THE LANDING-GEAR BOTTOM-BEARING SCRAPER-SEAL.

A. Lubrication of the Main Landing Gear and Doors

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

(1) Use the figures together with the tables that follow, to find the greasers.
(2) Lubricate the greasers of the MLG as follows:
(a) Lubricate greasers Item 1 in the MLG Table with 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) . Do this until new grease comes out.
(b) Lubricate greasers Item 4 in the MLG Table with 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) or Synthetic Oil base Grease-General Purpose Lithium Thickened - (Material No.03GBD1) . Do this until new grease comes out.
(c) Lubricate the remaining greasers in the MLG Table with Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) , 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) . Do this until new grease comes out.
(d) Lubricate greasers Items 2 thru 4 in the MLG DOOR AND UPLOCKS Table with Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) , 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) . Do this until new grease comes out.
(e) Lubricate greasers Items 1 and 5 in the MLG DOOR AND UPLOCKS Table with Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) , 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) as follows:

Use the hand-operated lubrication equipment to lubricate the uplock with a maximum of two full strokes.

(f) MLG Table:

No.	Component/Location	Total	Position of Greasers
1	Retraction Actuating Cylinder	6	1 on the piston rod 2 on the piston rod attachment-pin 3 on the structure attachment pin
2	Upper Leg	9	1 on the forward pintle housing 1 on the aft pintle housing 3 on the aft pintle pin 4 on the aircraft structure at the forward pintle bearing (it is permitted to lubricate only 2 greasers when the MLG is installed)
3	Gland Housing	3	3 on the bottom bearing
4	Torque Link	8	3 on the top torque link 2 on the top torque-link attachment-pin 3 on the bottom torque link
5	Lower Leg Lugs	2	1 on each lug
6	Leg Side-Stay Attachment	2	2 on the leg attachment bracket
7	Side-Stay	15	5 at the top cardan joint 7 at the middle joint 3 at the bottom cardan joint
8	Lockstay	13	2 at the side-stay attachment 3 at the middle joint 1 on the lockstay attachment lug of the upper leg 3 on the lockstay cardan joint 2 on the top of the lockstay 2 at the actuator attachment
9	Lockstay Actuating Cylinder	2	1 at each end of the actuating cylinder
10	Side-Stay Bracket, at A/C structure	4	2 at each bush

(g) MLG DOOR AND UPLOCKS Table:

No.	Component/Location	Total	Position of Greasers
1	MLG Door Uplock	4	2 on each side
2	MLG Door	1	1 on the aft hinge
3	MLG Door Uplock-Roller	1	1 on the roller
4	MLG Door Actuating-Cylinder	2	1 at each end of the actuating cylinder
5	MLG Uplock	4	2 on each side

(3) If the MLG-door actuator-bearing housing shows signs of lateral movement, replace it.

NOTE: The MLG-door actuator-bearing housing can show signs of circular movement, which is permitted.

(4) Remove the unwanted grease as follows:
(a) Clean the greasers with a clean Textile-Lint free Cotton - (Material No.14SBA1) and Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(b) Make sure that the greaser ball is in the correct position.
(5) Do an inspection of the chrome surfaces of the actuator piston rods.
(a) Make sure that there is no grease on the chrome surfaces of the actuator piston rods.
1 If you find grease on the chrome surfaces of the actuator piston rods, do the steps that follow:
a Clean the chrome surfaces with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
b Apply a thin layer of Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) with a clean Textile-Lint free Cotton - (Material No.14SBA1) on the chrome surfaces of the actuator piston rods.

Subtask 12-22-32-640-051-M ** ON A/C NOT FOR ALL

CAUTION: DO NOT OPERATE POWER-OPERATED LUBRICATION EQUIPMENT AT MORE THAN 207 bars (3000 psi). HIGH LUBRICATION PRESSURE CAN CAUSE DAMAGE TO THE AIRCRAFT.

A. Lubrication of the Main Landing Gear and Doors

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

Use the hand-operated lubrication equipment to lubricate the uplock with a maximum of two full strokes.

(f) MLG Table:

No.	Component/Location	Total	Position of Greasers
1	Retraction Actuating Cylinder	6	1 on the piston rod 2 on the piston rod attachment-pin 3 on the structure attachment pin
2	Upper Leg	9	1 on the forward pintle housing 1 on the aft pintle housing 3 on the aft pintle pin 4 on the aircraft structure at the forward pintle bearing (it is permitted to lubricate only 2 greasers when the MLG is installed)
3	Gland Housing	3	3 on the bottom bearing
4	Torque Link	8	3 on the top torque link 2 on the top torque-link attachment-pin 3 on the bottom torque link
5	Lower Leg lugs	2	1 on each lug
6	Leg Side-Stay Attachment	2	2 on the leg attachment bracket
7	Side-Stay	15	5 at the top cardan joint 7 at the middle joint 3 at the bottom cardan joint
8	Lockstay	13	2 at the side-stay attachment 3 at the middle joint 1 on the lockstay attachment lug of the upper leg 3 on the lockstay cardan joint 2 on the top of the lockstay 2 at the actuator attachment
9	Lockstay Actuating Cylinder	2	1 at each end of the actuating cylinder
10	Side-Stay Bracket, at A/C structure	2	1 at each bush

(g) MLG DOOR AND UPLOCKS Table:

No.	Component/Location	Total	Position of Greasers
1	MLG Door Uplock	4	2 on each side
2	MLG Door	1	1 on the aft hinge
3	MLG Door Uplock-Roller	1	1 on the roller
4	MLG Door Actuating-Cylinder	2	1 at each end of the actuating cylinder
5	MLG Uplock	4	2 on each side

(3) If the MLG-door actuator-bearing housing shows signs of lateral movement, replace it.

NOTE: The MLG-door actuator-bearing housing can show signs of circular movement, which is permitted.

(4) Remove the unwanted grease as follows:
(a) Clean the greasers with a clean lint-free cloth Textile-Lint free Cotton - (Material No.14SBA1) and Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(b) Make sure that the greaser ball is in the correct position.
(5) Do an inspection of the chrome surfaces of the actuator piston rods.
(a) Make sure that there is no grease on the chrome surfaces of the actuator piston rods.
1 If you find grease on the chrome surfaces of the actuator piston rods, do the steps that follow:
a Clean the chrome surfaces with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
b Apply a thin layer of Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) with a clean Textile-Lint free Cotton - (Material No.14SBA1) on the chrome surfaces of the actuator piston rods.

5. Close-up
Subtask 12-22-32-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Close the applicable MLG door (Ref. AMM TASK 32-12-00-410-001).

Subtask 12-22-32-942-050-A

B. Removal of Equipment
(1) Remove the SAFETY BARRIER(S).
(2) Remove the WARNING NOTICE(S).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.03.31 22:56:47 UTC