Installation of the Check Valve

TASK 32-31-47-400-001-A
Installation of the Check Valve

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.

FIN: 2537GM

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	2	WARNING NOTICE(S)
No specific	Torque wrench: range to between 2.94 and 2.6 m.daN (21.68 and 19.17 lbf.ft )
No specific	Torque wrench: range to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )
No specific	Torque wrench: range to between 5.3 and 4.8 m.daN (39.09 and 35.40 lbf.ft )
No specific	Torque wrench: range to between 6.83 and 6.26 m.daN (50.37 and 46.17 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -
(Material No.04JMD9)	Top Coat Polyurethane-- Decorative Furnishing

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
6	PACKING	AIPC 32-31-03-48-030
6	PACKING	AIPC 32-31-83-50-080

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
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 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
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 32-00-00-860-001-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 32-31-00-720-002-A	Functional Test of the Normal Extension and Retraction of the Landing Gear
TASK 51-75-13-916-002-A	Repair to a layer of Corrosion Preventive Compound
Check Valve 2537GM

3. Job Set-up
Subtask 32-31-47-860-051-A

A. Aircraft Maintenance Configuration
(1) Make sure that the PTU isolation coupling is disconnected (Ref. AMM TASK 29-23-00-860-001).
(2) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(3) Make sure that the flight configuration precautions were obeyed (Ref. AMM TASK 32-00-00-860-001).
(4) Make sure that the Green hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-001).
(5) Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).

Subtask 32-31-47-865-051-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
** 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

Subtask 32-31-47-941-051-A

C. Safety Precautions
(1) 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.

Subtask 32-31-47-560-050-A

D. 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.
(4) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(5) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to

The new AIPC 32-31-03-48-030 PACKING (6) or the new AIPC 32-31-83-50-080 PACKING (6)
The threads of the reducer tee (3)
The check valve (5).

4. Procedure
Subtask 32-31-47-420-051-A

A. Installation of the Check Valve 2537GM
(1) Remove the PLUG-BLANKING from each disconnected line end.
(2) Put the packing (6) on the check valve (5).
(3) Install the check valve (5) in the manifold (7).
(4) TORQUE the check valve (5) to between 6.83 and 6.26 m.daN (50.37 and 46.17 lbf.ft )

.
(5) Put the reducer tee (3) in position and connect the connector (4). Do not tighten at this time.
(6) Connect the connectors (1) and (2) to the reducer tee (3) and the check valve (5).
(7) TORQUE the connector (4) to between 5.3 and 4.8 m.daN (39.09 and 35.40 lbf.ft )

.
(8) TORQUE the connector (1) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(9) TORQUE the connector (2) to between 2.94 and 2.6 m.daN (21.68 and 19.17 lbf.ft )

.
(10) Identify all the connectors with Top Coat Polyurethane-- Decorative Furnishing (Material No.04JMD9) .

Subtask 32-31-47-865-052-A

B. 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
** 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

Subtask 32-31-47-860-052-A

C. 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 serviceable condition (Ref. AMM TASK 32-00-00-860-002).
(3) Remove the container.
(4) Remove the WARNING NOTICE(S).
(5) Remove the access platform(s).
(6) Close the right 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 32-31-47-720-050-A

D. Do the functional test of the MLG normal extension and retraction system (Ref. AMM TASK 32-31-00-720-002).
(1) Open the right MLG door (Ref. AMM TASK 32-12-00-010-001).
(2) Make sure that there is no hydraulic fluid leakage from the check valve 2537GM.

5. Close-up
Subtask 32-31-47-410-051-A

A. Close Access
(1) Apply corrosion protection to the check valve 2537GM, the connectors and the adjacent areas (Ref. AMM TASK 51-75-13-916-002).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the right MLG door (Ref. AMM TASK 32-12-00-410-001).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 12:31:05 UTC