Installation of the Manifold Assembly

TASK 32-31-36-400-802-A
Installation of the Manifold Assembly

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

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: OBEY THE HYDRAULIC SAFETY PROCEDURES.

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

ZONE: 734

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	ACCESS PLATFORM 1M(3 FT)
No specific	AR	CONTAINER - HYDRAULIC FLUID RESISTANT
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 3.20 and 2.90 m.daN (23.60 and 21.39 lbf.ft )
No specific	Torque wrench: range to between 4.61 and 4.32 m.daN (34.00 and 31.86 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
734	MAIN DOOR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	PACKING	AIPC 32-31-03-10-240
3	PACKING	AIPC 32-31-83-04-180

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-10-00-863-001-A	Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 29-23-00-860-002-A	Connection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 32-00-00-081-002-A	Removal of the Safety Devices from the Landing Gear Doors
TASK 32-00-00-481-002-A	Installation of the Safety Devices on the Landing Gear Doors
TASK 32-00-00-860-001-A	Flight Configuration Precautions with Electrical Power
TASK 32-00-00-860-001-A-01	Flight Configuration Precautions without Electrical Power
TASK 32-00-00-860-002-A	Ground Configuration after Flight Configuration with Electrical Power
TASK 32-00-00-860-002-A-01	Ground Configuration after Flight Configuration without Electrical Power
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 32-31-36-400-001-A	Installation of the MLG Check Valves
TASK 32-33-00-720-001-A	Functional Check of Free-Fall Extension
TASK 51-75-13-916-002-A	Repair to a layer of Corrosion Preventive Compound
Manifold Assembly

3. Job Set-up
Subtask 32-31-36-860-054-A

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized.
(Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the Green hydraulic system is depressurized
(Ref. AMM TASK 29-10-00-864-001).
(3) Make sure that the left MLG door is open (Ref. AMM TASK 32-12-00-010-001).
(4) Make sure that the safety devices are installed on the left MLG door (Ref. AMM TASK 32-00-00-481-002).
(5) Make sure that the reservoir of the Green hydraulic system is depressurized
(Ref. AMM TASK 29-14-00-614-001).
(6) Make sure that the PTU isolation coupling is disconnected (Ref. AMM TASK 29-23-00-860-001).
(7) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Green hydraulic system:

On panel 40VU in the cockpit
On the ground service panel of the Green hydraulic system.

(8) Obey the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).
(9) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(10) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position at zone 734.
(11) Make sure that the CONTAINER - HYDRAULIC FLUID RESISTANT is in position below the disconnected line ends to collect unwanted hydraulic fluid.

Subtask 32-31-36-865-054-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	L/G/LGCIU/SYS1/NORM	1GA	C09
** ON A/C NOT FOR ALL
49VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	H12
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	R35
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
121VU	LGCIU/BAT SPLY/SYS2	59GA	R33
121VU	LGCIU/BAT SPLY/SYS1	58GA	R32
** ON A/C ALL
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33
121VU	LGCIU/BAT SPLY/SYS2	59GA	R32
121VU	LGCIU/BAT SPLY/SYS1	58GA	R31

4. Procedure
Subtask 32-31-36-110-051-A

A. Preparation for Installation
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.

Subtask 32-31-36-420-055-A

B. Installation of the Manifold Assembly

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL LOOSEN OR TIGHTEN THE UNION TOO MUCH.

(1) Put the manifold (4) in position on the bracket (9).
(2) Install the washers (5) and the bolts (6).
(3) Tighten the bolts (6).
(4) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the:

Threads of the reducer (2)
New AIPC 32-31-03-10-240 PACKING (3) or the new AIPC 32-31-83-04-180 PACKING (3).

(5) Install the new packing (3) on the reducer (2).
(6) Install the reducer (2) on the manifold (4).
(7) TORQUE the reducer (2) to between 4.61 and 4.32 m.daN (34.00 and 31.86 lbf.ft )

.
(8) Remove the PLUG - BLANKING from the disconnected end of the hydraulic line (1).
(9) Connect the hydraulic line (1) to the reducer (2).
(10) TORQUE the nut of the hydraulic line (1) to between 3.20 and 2.90 m.daN (23.60 and 21.39 lbf.ft )

.
(11) Install the MLG check valves (7) and (8) (Ref. AMM TASK 32-31-36-400-001).
(12) Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).

5. Close-up
Subtask 32-31-36-865-055-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	L/G/LGCIU/SYS1/NORM	1GA	C09
** ON A/C NOT FOR ALL
49VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	H12
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	R35
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
121VU	LGCIU/BAT SPLY/SYS2	59GA	R33
121VU	LGCIU/BAT SPLY/SYS1	58GA	R32
** ON A/C ALL
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33
121VU	LGCIU/BAT SPLY/SYS2	59GA	R32
121VU	LGCIU/BAT SPLY/SYS1	58GA	R31

Subtask 32-31-36-860-056-A

B. Preparation for Test
(1) Connect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-002).
(2) If the flight configuration precautions were obeyed, put the aircraft back to the ground configuration (Ref. AMM TASK 32-00-00-860-002).
(3) Remove the CONTAINER - HYDRAULIC FLUID RESISTANT.
(4) Remove the WARNING NOTICE(S).
(5) Remove the access platform(s).
(6) Close the left MLG door (Ref. AMM TASK 32-12-00-410-001).
(7) If necessary, fill the reservoir of the Green hydraulic system to the correct level (Ref. AMM TASK 12-12-29-611-001).

Subtask 32-31-36-720-051-A

C. Test(s)
(1) Do a functional check of free-fall extension (Ref. AMM TASK 32-33-00-720-001).
(2) Open the left MLG door (Ref. AMM TASK 32-12-00-010-001).
(3) Put the ACCESS PLATFORM 1M(3 FT) in position.
(4) Make sure that there is no hydraulic fluid leakage from the check valve(s).

Subtask 32-31-36-410-052-A

D. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Apply corrosion protection to the check valve(s), the pipe connections and the adjacent areas (Ref. AMM TASK 51-75-13-916-002).
(3) Remove the safety devices from the left MLG door (Ref. AMM TASK 32-00-00-081-002).
(4) Remove the ACCESS PLATFORM 1M(3 FT).
(5) Close the left MLG door (Ref. AMM TASK 32-12-00-410-001).

Subtask 32-31-36-863-050-A

E. Pressurization of the Hydraulic System
(1) Pressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-863-001).

Subtask 32-31-36-862-050-A

F. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 32-31-36-942-053-A

G. Removal of Equipment
(1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:45:10 UTC