Installation of the Dual-Valve Alternate Brake-Distribution

TASK 32-43-14-400-001-A
Installation of the Dual-Valve Alternate Brake-Distribution

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.

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES. WORK ON THE HYDRAULIC SYSTEMS CAN BE DANGEROUS.

FIN: 2577GM ** ON A/C NOT FOR ALL

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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 1.32 and 1.21 m.daN (116.81 and 107.08 lbf.in )
No specific	Torque wrench: range to between 1.7 and 1.5 m.daN (12.54 and 11.06 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 3.58 and 3.47 m.daN (26.40 and 25.59 lbf.ft )
No specific	Torque wrench: range to between 5.9 and 5.4 m.daN (43.51 and 39.82 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -
(Material No.06AEA1)	Polysulfide Sealant-Low Adhesion Brushable -
(Material No.06LCG9)	Non Hardening Jointing Putty-Medium Temp. Area - -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
8	PACKINGS	AIPC 32-43-03-02-060
2	PACKING	AIPC 32-43-03-02-080
5	PACKING	AIPC 32-43-03-02-100

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-14-00-614-002-A	Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01	Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
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 32-12-00-410-001-A	Close the Main Gear Doors after Access
TASK 32-43-00-612-001-A	Filling and Bleeding of the Low Pressure Control System of the Alternate Braking
TASK 32-43-00-612-001-A-01	Filling and Bleeding of the Low Pressure Control System of the Alternate Braking using Green Reservoir fluid
TASK 32-43-00-710-001-A	Operational Check of Alternate Braking System
TASK 32-43-00-870-002-A	Bleeding of the High Pressure Alternate Braking System
TASK 51-75-13-916-002-A	Repair to a layer of Corrosion Preventive Compound
Dual-Valve 2577GM Alternate Brake-Distribution

3. Job Set-up
Subtask 32-43-14-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-002).
(2) Make sure that the Isolation Coupling of the Power Transfer Unit (PTU) is disconnected (Ref. AMM TASK 29-23-00-860-001).
(3) Make sure that the reservoir of the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).

Subtask 32-43-14-865-051-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR 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
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
121VU	HYDRAULIC/Y HYD/PUMP ENG2/MONG	3700GD	Q37
121VU	HYDRAULIC/Y HYD/PUMP ENG2/CTL	3701GD	Q36
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 32-43-14-941-051-A ** ON A/C NOT FOR ALL

C. Safety Precautions
(1) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Yellow hydraulic system:

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

4. Procedure
Subtask 32-43-14-560-050-B ** ON A/C NOT FOR ALL

A. Preparation of the Replacement Component
(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(a) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the:

New packings (2), (5) and (8)
Threads of the unions (3) and (6)
Threads of the unions (9).

(b) Install the new AIPC 32-43-03-02-080 PACKING (2) on the union (3).
(c) Install the new AIPC 32-43-03-02-060 PACKINGS (8) on the unions (9).
(d) Install the new AIPC 32-43-03-02-100 PACKING (5) on the union (6).
(e) Remove the blanking plugs from the new dual valve (25).
(f) Install the union (6) in the new dual valve (25). TORQUE it to between 1.32 and 1.21 m.daN (116.81 and 107.08 lbf.in )

.
(g) Install the unions (9) in the new dual valve (25). TORQUE them to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(h) Install the union (3) in the new dual valve (25). TORQUE it to between 3.58 and 3.47 m.daN (26.40 and 25.59 lbf.ft )

Subtask 32-43-14-560-051-B ** ON A/C NOT FOR ALL

B. Preparation for Installation
(1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(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) Apply Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) to the bolts (23), (22), (17) and the washers (24), (19), and (12).
(5) Apply Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) to the interface of the dual valve (25) and the aircraft structure.

Subtask 32-43-14-420-051-B ** ON A/C NOT FOR ALL

C. Installation of the Dual Valve (2577GM)
(1) Put the dual valve (25) in position and install the washers (24) and the bolts (23).
(2) Remove the PLUG-BLANKING from each disconnected line end.
(3) Make sure that the hydraulic line end-fittings are serviceable.
(4) Connect the hydraulic pipe (7) to the union (6). TORQUE it to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(5) Connect the elbow assemblies (1) to the dual valve (25). TORQUE them to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(6) Connect the elbow assembly (26) to the union (9). TORQUE it to between 5.9 and 5.4 m.daN (43.51 and 39.82 lbf.ft )

.
(7) Connect the pipe (4) to the union (3). TORQUE it to between 5.9 and 5.4 m.daN (43.51 and 39.82 lbf.ft )

.
(8) Connect the pipes (10) to the unions (9). TORQUE them to between 5.9 and 5.4 m.daN (43.51 and 39.82 lbf.ft )

.
(9) Connect the drain hose (15) as follows:
(a) Put the drain hose (15) in position and install the bolt (22) and the spacer (21).
(b) Put the clamp (20) in position and install the washer (19) and the nut (18).
(c) Put the clamps (16) in position and install the bolt (17), the washer (12) and the nut (11).
(d) If removed, install the plug (13) and the clamp (14).

Subtask 32-43-14-865-052-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR 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
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
121VU	HYDRAULIC/Y HYD/PUMP ENG2/MONG	3700GD	Q37
121VU	HYDRAULIC/Y HYD/PUMP ENG2/CTL	3701GD	Q36
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 32-43-14-860-052-A ** ON A/C NOT FOR ALL

E. Preparation for Test
(1) Connect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-002).
(2) Do the filling and bleeding of the low pressure control system of the alternate braking (Ref. AMM TASK 32-43-00-612-001).
(3) Bleed the high pressure-alternate brake system (Ref. AMM TASK 32-43-00-870-002).
(4) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(5) If necessary fill the reservoir of the Yellow hydraulic system to the correct level (Ref. AMM TASK 12-12-29-611-001).

Subtask 32-43-14-710-050-A ** ON A/C NOT FOR ALL

F. Test
(1) Do the operational check of the alternate braking with anti-skid (Ref. AMM TASK 32-43-00-710-001).
(2) Make sure that there is no hydraulic fluid leakage from the dual valve (25). Leaks are not permitted.

5. Close-up
Subtask 32-43-14-410-050-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Apply corrosion protection to the bolt heads, pipe connections and the adjacent areas (Ref. AMM TASK 51-75-13-916-002).
(2) Remove the CONTAINER 5 L (1.32 USGAL).
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(5) Make sure that the work area is clean and clear of tools and other items.
(6) Close the right MLG door (Ref. AMM TASK 32-12-00-410-001).
(7) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 12:32:04 UTC