Installation of the Automatic Selector

TASK 32-42-13-400-001-A
Installation of the Automatic Selector

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: 2576GM ** 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 1.19 and 1.08 m.daN (105.31 and 95.58 lbf.in )
No specific	Torque wrench: range to between 1.54 and 1.42 m.daN (11.36 and 10.47 lbf.ft )
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 3.47 and 3.19 m.daN (25.59 and 23.53 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.04JMD9)	Top Coat Polyurethane-- Decorative Furnishing
(Material No.06AEA1)	Polysulfide Sealant-Low Adhesion Brushable -

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
4	PACKINGS	AIPC 32-42-03-04-120
9	PACKINGS	AIPC 32-42-03-04-140
13	PACKING	AIPC 32-42-03-04-160

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 12-14-32-614-002-A	Nitrogen Filling of the Yellow Hydraulic System, Brake Pressure Accumulator
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 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
TASK 32-42-00-710-001-A	Operational Check of the Normal Braking System
TASK 32-42-00-870-001-A	Bleeding of the Normal Braking at the Brake Units
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
Automatic Selector 2576GM

3. Job Set-up
Subtask 32-42-13-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the Green and Yellow hydraulic systems are depressurized (Ref. AMM TASK 29-10-00-864-001). and (Ref. AMM TASK 29-10-00-864-002).
(2) Make sure that the reservoirs of the Green and Yellow hydraulic systems are depressurized (Ref. AMM TASK 29-14-00-614-001).

Subtask 32-42-13-865-053-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
121VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	R35
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 32-42-13-941-051-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 Green or Yellow hydraulic systems:

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

Subtask 32-42-13-560-050-B ** ON A/C NOT FOR ALL

D. Preparation of the Replacement Component
(1) Remove the unions (3). Remove and discard the packings (4) from the unions (3).
(2) Remove the restrictor (8). Remove and discard the packing (9) from the restrictor (8).
(3) Remove the unions (10). Remove and discard the packings (9) from the unions (10).
(4) Remove the special union (20). Remove and discard the packing (9) from the special union (20).
(5) Remove the reducer (14). Remove and discard the packing (13) from the reducer (14).
(6) Obey the hydraulic safety proceures (Ref. AMM TASK 29-00-00-910-002).
(7) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the:

Threads of the unions (3) and (10)
Threads of the special union (20)
Threads of the restrictor (8)
Threads of the reducer (14)
New packings (4), (9) and (13).

(8) Put the new AIPC 32-42-03-04-120 PACKINGS (4) on the unions (3).
(9) Put the new AIPC 32-42-03-04-140 PACKINGS (9) on the restrictor (8), the unions (10) and the special union (20).
(10) Put the new AIPC 32-42-03-04-160 PACKING (13) on the reducer (14).
(11) Remove the blanking plugs.
(12) Install the unions (3) in the automatic selector (5).
(13) TORQUE the unions (3) to between 1.19 and 1.08 m.daN (105.31 and 95.58 lbf.in )

.
(14) Install the restrictor (8) and the unions (10) in the automatic selector (5).
(15) TORQUE the restrictor (8) and the unions (10) to between 3.47 and 3.19 m.daN (25.59 and 23.53 lbf.ft )

.
(16) Install the special union (20) in the automatic selector (5).
(17) TORQUE the special union (20) to between 3.47 and 3.19 m.daN (25.59 and 23.53 lbf.ft )

.
(18) Install the reducer (14) in the automatic selector (5).
(19) TORQUE the reducer (14) to between 1.54 and 1.42 m.daN (11.36 and 10.47 lbf.ft )

Subtask 32-42-13-560-051-A ** ON A/C NOT FOR ALL

E. 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) Apply Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) to the component interface.

4. Procedure
Subtask 32-42-13-420-050-B ** ON A/C NOT FOR ALL

A. Installation of the Automatic Selector 2576GM

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 automatic selector (5) in position and install the washers (19) and the bolts (18).
(2) Remove the blanking plugs.
(3) Connect the connectors (1), (2) and (17) to the unions (10), (3) and to the special union (20).
(4) Put the elbow (6) in position and connect the connectors (7) to the restrictor (8).
(5) Put the restrictor valve (12) in positon and connect the connectors (11) to the union (10).

CAUTION: BE CAREFUL WHEN YOU INSTALL THE THROTTLE VALVE. A RED ARROW, IDENTIFIED AS 'F' IS SHOWN ON SOME THROTTLE VALVES. THE ARROW SHOWS THE DIRECTION OF THE THROTTLE AND NOT THE DIRECTION OF THE FLOW. THUS, WHEN YOU INSTALL THE THROTTLE VALVE, MAKE SURE THAT THE ARROW POINTS AWAY FROM THE AUTOMATIC SELECTOR. IF YOU INSTALL THE THROTTLE VALVE IN THE INCORRECT DIRECTION, YOU CAN CAUSE DAMAGE TO THE SYSTEM.

(6) Put the elbow (16) in position and connect the connectors (15) to the reducer (14).
(7) TORQUE the connectors (1), (7), (11) and (17) to between 5.9 and 5.4 m.daN (43.51 and 39.82 lbf.ft )

.
(8) TORQUE the connectors (2) and (15) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(9) Make a mark on the connections with Top Coat Polyurethane-- Decorative Furnishing (Material No.04JMD9) .

Subtask 32-42-13-865-054-A ** ON A/C NOT FOR ALL

B. 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
121VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	R35
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 32-42-13-860-052-A ** ON A/C NOT FOR ALL

C. Preparation for Test
(1) Service the brake accumulator (Ref. AMM TASK 12-14-32-614-002).
(2) Bleed the normal brake system (Ref. AMM TASK 32-42-00-870-001).
(3) Bleed the alternate brake system (Ref. AMM TASK 32-43-00-870-002).

Subtask 32-42-13-710-050-A ** ON A/C NOT FOR ALL

D. Test
(1) Do the operational check of the normal braking system (Ref. AMM TASK 32-42-00-710-001).
(2) Do the operational check of the alternate braking system (Ref. AMM TASK 32-43-00-710-001).
(3) Make sure that there is no hydraulic fluid leakage from the automatic selector 2576GM. Leaks are not permitted.

5. Close-up
Subtask 32-42-13-410-051-A ** ON A/C NOT FOR ALL

A. Close Access

Automatic Selector 2576GM ** ON A/C NOT FOR ALL

(1) Apply corrosion protection (Ref. AMM TASK 51-75-13-916-002) to the:

Heads of the bolts (18)
Connectors (1), (2), (7), (11), (15) and (17)
Adjacent areas.

(2) Remove the container.
(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) If necessary fill the reservoirs of the Green and the Yellow hydraulic systems to the correct level (Ref. AMM TASK 12-12-29-611-001).
(8) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:47:48 UTC