Change of the Hydraulic Fluid in the Yellow Hydraulic System - with Ground Cart Available

TASK 12-36-29-600-002-A
Change of the Hydraulic Fluid in the Yellow Hydraulic System - with Ground Cart Available

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: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

1. Reason for the Job
To change the type of hydraulic fluid or to change the hydraulic fluid if the contamination is out of tolerance.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT)
No specific	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	1	CONTAINER 150L (40 USGAL)
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	1	GROUND POWER CART-HYDRAULIC
No specific	AR	PLUG - BLANKING
No specific	1	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)
No specific	Torque wrench: range to between 157 and 147 m.N (115.78 and 108.41 lbf.ft )
No specific	Torque wrench: range to between 10.67 and 9.66 m.daN (78.69 and 71.24 lbf.ft )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
134AR, 154AR, 198CB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 12-12-29-611-002-A	Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart
TASK 12-32-29-281-001-A	Analyze Hydraulic Fluid
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 29-10-00-680-002-A	Drainage of the Reservoir of the Yellow Hydraulic System
TASK 29-10-00-863-002-A	Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-13-36-000-001-A	Removal of the Engine 2 Yellow Hydraulic Pump Delivery Check Valve
TASK 29-13-36-400-001-A	Installation of the Engine 2 Yellow Hydraulic Pump Delivery Check Valve
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 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
TASK 32-43-00-870-002-A	Bleeding of the High Pressure Alternate Braking System
TASK 32-51-00-720-003-A	Functional Test of the Nose Wheel Steering with the Handwheel
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 78-31-00-710-040-A-01	Operational Test of the Thrust Reverser without CFDS - Engine not Running
TASK 78-31-00-710-040-A-02	Operational Test of the Thrust Reverser without CFDS - Engine Running
TASK 78-31-00-710-041-A	Operational Test of the Thrust Reverser System with the CFDS
TASK 78-31-00-710-041-A-02	Operational test of the Thrust Reverser without the CFDS and Engine Running
TASK 78-31-00-710-043-A	Operational Test of the Thrust Reverser without CFDS - Engine Not Running
TASK 78-31-00-710-043-A-01	Operational Test of the Thrust Reverser without CFDS - Engine Running
TASK 78-31-00-710-805-A	Operational Test of Thrust Reverser with MCDU
TASK 78-31-00-710-805-A-01	Thrust Reverser Cycling Test (Engine Running)
Change of the Hydraulic Fluid in the Yellow Hydraulic System - Schematic

3. Job Set-up
Subtask 12-36-29-860-103-A

A. Safety Precautions
(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Put the WARNING NOTICE(S) and SAFETY BARRIER(S) in position.
(3) On section 40VU of the overhead panel, push the PTU pushbutton switch. Make sure that the OFF legend comes on.
(4) Disconnect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-001).

Subtask 12-36-29-865-052-A

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	HYD/HYD PWR/B WARN/& CTL	2702GJ	C12
** 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/HYD POWER/Y	3803GX	N30
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** ON A/C ALL
121VU	HYDRAULIC/Y HYD/PUMP ENG2/MONG	3700GD	Q37
121VU	HYDRAULIC/Y HYD/PUMP ENG2/CTL	3701GD	Q36
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33
** ON A/C ALL
123VU	B HYD/ELEC PUMP	2701GJ	AB09
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 12-36-29-010-074-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the access door 198CB.
(2) Open the access door 134AR.
(3) Open the access door 154AR.
(4) Open the engine 2 fan-cowl doors (Ref. AMM TASK 71-13-00-010-040).
(5) Open the left or right MLG door (Ref. AMM TASK 32-12-00-010-001).
(6) Put the locking handles of the FWD and AFT cargo-compartment doors in the UNLOCKED position.

Subtask 12-36-29-010-074-B ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the access door 198CB.
(2) Open the access door 134AR.
(3) Open the access door 154AR.
(4) Open the engine 2 fan-cowl doors (Ref. AMM TASK 71-13-00-010-010).
(5) Open the left or right MLG door (Ref. AMM TASK 32-12-00-010-001).
(6) Put the locking handles of the FWD and AFT cargo-compartment doors in the UNLOCKED position.

Subtask 12-36-29-010-074-D ** ON A/C NOT FOR ALL

Subtask 12-36-29-680-051-A

D. Drain the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-10-00-680-002).

Subtask 12-36-29-860-101-A ** ON A/C NOT FOR ALL

E. Preparation for the Fluid Change

Change of the Hydraulic Fluid in the Yellow Hydraulic System - Schematic ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE THAT THE FLOW RATE AND THE SUPPLY PRESSURE ON THE GROUND HYDRAULIC CART ARE SET TO A MINIMUM.

(1) Put the ACCESS PLATFORM 2M (6 FT) in position at the engine 2.
(2) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the MLG bay.
(3) Put the CONTAINER 5 L (1.32 USGAL) below the fluid disconnect panel at the engine 2 to collect the hydraulic fluid.
(4) Put the GROUND POWER CART-HYDRAULIC in position as necessary.
(5) Connect the pressure hose of the GROUND POWER CART-HYDRAULIC (filled with new hydraulic fluid) to the delivery connector 3008GM at the ground service panel (Ref. detail A).
(6) Connect the return hose of the auxiliary hydraulic reservoir with the CONTAINER 150L (40 USGAL) to the suction connector 3006GM at the ground service panel.

NOTE: The auxiliary hydraulic reservoir must have a contents gage.

Subtask 12-36-29-860-101-B ** ON A/C NOT FOR ALL

E. Preparation for the Hydraulic Fluid Change

Change of the Hydraulic Fluid in the Yellow Hydraulic System - Schematic ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE THAT THE FLOW RATE AND THE SUPPLY PRESSURE ON THE GROUND HYDRAULIC CART ARE SET TO A MINIMUM.

(1) Put the NLG on to the turntable (to prevent damage to the tires when the steering is operated).
(2) Put the ACCESS PLATFORM 2M (6 FT) in position at the engine 2.
(3) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the MLG bay.
(4) Put the CONTAINER 5 L (1.32 USGAL) below the fluid disconnect panel at the engine 2 to collect the unwanted hydraulic fluid.
(5) Put the GROUND POWER CART-HYDRAULIC in position as necessary.
(6) Connect the pressure hose of the GROUND POWER CART-HYDRAULIC (filled with new hydraulic fluid) to the delivery connector 3008GM at the ground service panel (Ref. detail A).
(7) Connect the return hose of the auxiliary hydraulic reservoir with the CONTAINER 150L (40 USGAL) to the suction connector 3006GM at the ground service panel.

NOTE: The auxiliary hydraulic reservoir must have a contents gage.

4. Procedure
Subtask 12-36-29-611-059-A

A. Fluid Change without Hydraulic Lines of the Engine Driven Pump (EDP) (Ref. detail A)

CAUTION: DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.

(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Operate the hydraulic power cart.

NOTE: Increase the flow rate and the pressure as necessary.

(3) In the cockpit, operate the flight controls.

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(a) On the panel 11VU, move the GND SPLRS ARMED lever to the FULL position and then to the RET position. Do this step 3 times.

NOTE: The spoilers 1, 2, 4 and 5 LH and RH operate.

(b) On the panel 18VU or 19VU, move the side stick fully forward and then fully rearward. Do this step 3 times.

NOTE: The elevators operate.

(c) At the captain or first officer position, push the LH pedal fully forward (and release it) then the RH pedal fully forward (and release it) . Do this step 3 times.

NOTE: The rudder operates.

(d) On the panel 114VU, move the flap/slat lever to the FULL position and then to the 0 deg position.

NOTE: The flaps operate.

(e) On the center pedestal, turn one of the pitch-trim control wheels to the DN stop and then to the UP stop. Do this step 3 times. Turn the pitch-trim control wheel to the 0 deg position.

NOTE: The THS operates.

(4) Stop the hydraulic power cart.

Subtask 12-36-29-869-059-A

B. Isolation of the Primary Flight Controls
(1) On the panel 50VU in the cockpit, lift the guard and push the HYD/LEAK MEASUREMENT VALVES/Y P/BSW (the OFF light comes on).

Subtask 12-36-29-611-060-B ** ON A/C NOT FOR ALL

C. Continuation of the Fluid Change without the Hydraulic Lines of the EDP

WARNING: MAKE SURE THAT THE TRAVEL RANGE OF THE THRUST REVERSER IS CLEAR BEFORE YOU PRESSURIZE THE HYDRAULIC SYSTEM. IF YOU DO NOT OBEY THESE INSTRUCTIONS, INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.

CAUTION: DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.

(1) Make sure that the selector valve 2500MJ is energized.
(2) On the yellow ground service panel, make sure that the selector valve 2500MJ is in the open position.
(3) Operate the hydraulic power cart.
(4) Increase the rate of flow and the pressure as necessary.
(5) Operate the nose wheel steering (Ref. AMM TASK 32-51-00-720-003).
(6) On the cargo-door control panels, put and hold the selectors in the OPEN position until the cargo doors are open. Put and hold the selectors in the CLOSE position until the cargo doors are closed. Do this step two times.

NOTE: The FWD and the AFT cargo-compartment doors operate.

(7) Operate the thrust reverser of engine 2 (Ref. AMM TASK 78-31-00-710-041).
(8) Bleed a minimum of 3 l (0.7925 USgal) of hydraulic fluid from the brake units of the alternate braking system (Ref. AMM TASK 32-43-00-870-002).

Subtask 12-36-29-611-060-F ** ON A/C NOT FOR ALL

C. Continuation of the Fluid Change without the Hydraulic Lines of the EDP

CAUTION: DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.

NOTE: Increase the rate of flow and the pressure as necessary.

(5) On the cargo-door control panels, put and hold the selectors in the OPEN position until the cargo doors are open. Put and hold the selectors in the CLOSE position until the cargo doors are closed. Do this step 2 times.

NOTE: The FWD and AFT cargo-compartment doors operate.

(6) Operate the thrust reverser of Engine 2 (Ref. AMM TASK 78-31-00-710-040) or (Ref. AMM TASK 78-31-00-710-040).
(7) Operate the nose wheel steering (Ref. AMM TASK 32-51-00-720-003).
(8) Bleed a minimum of 3 l (0.7925 USgal) of hydraulic fluid from the brake units of the alternate braking system (Ref. AMM TASK 32-43-00-870-002).

Subtask 12-36-29-611-060-G ** ON A/C NOT FOR ALL

C. Continuation of the Fluid Change without the Hydraulic Lines of the EDP

CAUTION: DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.

NOTE: Increase the rate of flow and the pressure as necessary.

NOTE: The FWD and AFT cargo-compartment doors operate.

(6) Operate the thrust reverser of Engine 2 (Ref. AMM TASK 78-31-00-710-043).
(7) Operate the nose wheel steering (Ref. AMM TASK 32-51-00-720-003).
(8) Bleed a minimum of 3 l (0.7925 USgal) of hydraulic fluid from the brake units of the alternate braking system (Ref. AMM TASK 32-43-00-870-002).

Subtask 12-36-29-611-060-I ** ON A/C NOT FOR ALL

C. Continuation of the Fluid Change without the Hydraulic Lines of the EDP

CAUTION: DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.

(1) Make sure that the manual selector valves on the leakage measurement selector-valve 3146GM (in the MLG bay) are in the OFF position.
(2) Make sure that the selector valve 2500MJ is energized.
(3) On the yellow ground service panel, make sure that the selector valve 2500MJ is in the open position.
(4) Operate the hydraulic power cart.
(5) Increase the rate of flow and the pressure as necessary.
(6) Operate the nose wheel steering (Ref. AMM TASK 32-51-00-720-003).
(7) On the cargo-door control panels, put and hold the selectors in the OPEN position until the cargo doors are open. Put and hold the selectors in the CLOSE position until the cargo doors are closed. Do this step two times.

NOTE: The FWD and the AFT cargo-compartment doors operate.

(8) Operate the thrust reverser of engine 2 (Ref. AMM TASK 78-31-00-710-043).
(9) Bleed a minimum of 3 l (0.7925 USgal) of hydraulic fluid from the brake units of the alternate braking system (Ref. AMM TASK 32-43-00-870-002).

Subtask 12-36-29-611-060-M ** ON A/C NOT FOR ALL

C. Continuation of the Fluid Change without the Hydraulic Lines of the EDP

CAUTION: DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.

NOTE: The FWD and the AFT cargo-compartment doors operate.

(7) Operate the thrust reverser of engine 2 (Ref. AMM TASK 78-31-00-710-043).
(8) Bleed a minimum of 3 l (0.7925 USgal) of hydraulic fluid from the brake units of the alternate braking system (Ref. AMM TASK 32-43-00-870-002).

Subtask 12-36-29-611-060-CK ** ON A/C NOT FOR ALL

C. Continuation of the Fluid Change without the Hydraulic Lines of the EDP

CAUTION: DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.

(1) Make sure that selector valve 2500MJ is energized.
(2) On the yellow ground service panel, make sure that selector valve 2500MJ is in the open position.
(3) Operate the hydraulic power cart.
(4) Increase the rate of flow and the pressure as necessary.
(5) Operate the nose wheel steering (Ref. AMM TASK 32-51-00-720-003).
(6) On the cargo-door control panels, put and hold the selectors in the OPEN position until the cargo doors are open. Put and hold the selectors in the CLOSE position until the cargo doors are closed. Do this step two times.

NOTE: The forward and the aft cargo-compartment doors operate.

(7) Operate the thrust reverser of engine 2 (Ref. AMM TASK 78-31-00-710-805).
(8) Bleed a minimum of 3 l (0.7925 USgal) of hydraulic fluid from the brake units of the alternate braking system (Ref. AMM TASK 32-43-00-870-002).

Subtask 12-36-29-611-061-A

D. Change the hydraulic fluid in the brake accumulator 2582GM.

CAUTION: DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.

(1) Stop the hydraulic power cart.
(2) On the brake manifold 3016GM (in the MLG bay), push the pressure relief valve 3067GM to drain the accumulator 2582GM of hydraulic fluid.
(3) Operate the hydraulic power cart.

NOTE: Increase the rate of flow and the pressure as necessary.

(4) Do the steps (1) thru (3) 3 times.
(5) Stop the hydraulic power cart.
(6) Disconnect the pressure hose of the hydraulic power cart from the delivery connector 3008GM at the ground service panel.

Subtask 12-36-29-611-057-A

E. Fluid Change of the Suction Line of the EDP (Ref. detail B)

CAUTION: DO NOT LET HYDRAULIC FLUID FALL ON THE ENGINE. UNWANTED HYDRAULIC FLUID MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FLUID CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.

CAUTION: MAKE SURE THAT THE FLOW RATE AND THE SUPPLY PRESSURE ON THE GROUND HYDRAULIC CART ARE SET TO A MINIMUM.

CAUTION: DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.

(1) Connect the hose of the auxiliary hydraulic reservoir to the suction connector 3006GM at the ground service panel.
(2) Disconnect the suction line 3038GM at the fluid disconnect panel of the engine 2.
(3) Connect the pressure hose of the hydraulic power cart to the coupling 3700GM at the fluid disconnect panel of the engine 2.
(4) Put the PLUG-BLANKING in each disconnected line end.
(5) Operate the hydraulic power cart until a minimum of 20 l (5.2834 USgal) of hydraulic fluid flows into the auxiliary hydraulic reservoir.

NOTE: Increase the rate of flow and the pressure as necessary.

(6) Stop the hydraulic power cart.
(7) Disconnect the hose of the auxiliary hydraulic reservoir from the suction connector 3006GM at the ground service panel.
(8) Disconnect the pressure hose of the hydraulic power cart from the coupling 3700GM at the fluid disconnect panel of the engine 2.
(9) Remove the blanking plugs.
(10) Connect the suction line 3038GM at the fluid disconnect panel of the engine 2.

Subtask 12-36-29-611-058-A ** ON A/C NOT FOR ALL

F. Fluid Change of the Pressure Line of the EDP (Ref. detail C)

CAUTION: MAKE SURE THAT THE FLOW RATE AND THE SUPPLY PRESSURE ON THE GROUND HYDRAULIC CART ARE SET TO A MINIMUM.

CAUTION: DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.

(1) Connect the pressure hose of the hydraulic power cart to the delivery connector 3008GM
(2) Disconnect the pressure line 3673GM from the pressure coupling of the fluid disconnect panel at the engine 2.
(3) Remove the check valve 3050GM (Ref. AMM TASK 29-13-36-000-001).
(4) Connect the hose of the auxiliary hydraulic reservoir to the open pressure coupling in the fluid disconnect panel of the engine 2.
(5) Put the PLUG-BLANKING in each disconnected line end.
(6) Operate the hydraulic power cart until a minimum of 10 l (2.6417 USgal) of hydraulic fluid flows into the auxiliary hydraulic reservoir.

NOTE: Increase the rate of flow and the pressure as necessary, do not pressurize to more than 100 psi (6.8948 bar).

(7) Stop the hydraulic power cart.
(8) Disconnect the pressure hose of the hydraulic power cart from the delivery connector 3008GM
(9) Disconnect the hose of the auxiliary hydraulic reservoir from the pressure port at the fluid disconnect panel of the engine 2.
(10) Install the check valve 3050GM (Ref. AMM TASK 29-13-36-400-001).
(11) Remove the blanking plugs.
(12) Connect the pressure line 3673GM to the pressure coupling of the fluid disconnect panel at the engine 2.
(13) TORQUE the coupling nut of the pressure line 3673GM to between 10.67 and 9.66 m.daN (78.69 and 71.24 lbf.ft )

(14) Remove the hydraulic power cart.

Subtask 12-36-29-611-058-B ** ON A/C NOT FOR ALL

F. Fluid Change of the Pressure Line of the EDP (Ref. detail C)

CAUTION: MAKE SURE THAT THE FLOW RATE AND THE SUPPLY PRESSURE ON THE GROUND HYDRAULIC CART ARE SET TO A MINIMUM.

CAUTION: DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.

(1) Connect the pressure hose of the hydraulic power cart to the delivery connector 3008GM.
(2) Disconnect the pressure line 3673GM from the pressure coupling of the fluid disconnect panel at the engine 2.
(3) Connect the hose of the auxiliary hydraulic reservoir to the open pressure coupling in the fluid disconnect panel of the engine 2.
(4) Put the PLUG-BLANKING in each disconnected line end.
(5) Operate the hydraulic power cart until a minimum of 10 l (2.6417 USgal) of hydraulic fluid flows into the auxiliary hydraulic reservoir.

NOTE: Increase the rate of flow and the pressure as necessary, do not pressurize to more than 100 psi (6.8948 bar).

(6) Stop the hydraulic power cart.
(7) Disconnect the pressure hose of the hydraulic power cart from the delivery connector 3008GM.
(8) Disconnect the hose of the auxiliary hydraulic reservoir from the pressure port at the fluid disconnect panel of the engine 2.
(9) Remove the blanking plugs.
(10) Connect the pressure line 3673GM to the pressure coupling of the fluid disconnect panel at the engine 2.
(11) TORQUE the coupling nut of the pressure line 3673GM to between 157 and 147 m.N (115.78 and 108.41 lbf.ft )

.
(12) Remove the hydraulic power cart.

5. Close-up
Subtask 12-36-29-860-102-A

A. Put the aircraft back to the serviceable condition.
(1) Fill the reservoir of the Yellow hydraulic system (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(2) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(3) Pressurize the Yellow hydraulic system with the ground cart (Ref. AMM TASK 29-10-00-863-002).
(4) On the panel 50VU in the cockpit, lift the guard and push the HYD/LEAK MEASUREMENT VALVES/Y P/BSW (the OFF light goes off).
(5) Operate the related hydraulic systems to remove the air.
(6) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002).
(7) Make sure that the reservoir of the Yellow hydraulic system is correctly filled with new fluid (Ref. AMM TASK 12-12-29-611-001).
(8) Remove the container.

Subtask 12-36-29-410-063-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Put the locking handles of the FWD and AFT cargo-compartment doors in the LOCKED position.
(3) Close the access door 198CB.
(4) Close the access door 134AR.
(5) Close the access door 154AR.
(6) Close the engine 2 fan-cowl doors (Ref. AMM TASK 71-13-00-410-040).
(7) Close the applicable MLG door (Ref. AMM TASK 32-12-00-410-001).

Subtask 12-36-29-410-063-B ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Put the locking handles of the FWD and AFT cargo-compartment doors in the LOCKED position.
(3) Close the access door 198CB.
(4) Close the access door 134AR.
(5) Close the access door 154AR.
(6) Close the engine 2 fan-cowl doors (Ref. AMM TASK 71-13-00-410-010).
(7) Close the applicable MLG door (Ref. AMM TASK 32-12-00-410-001).

Subtask 12-36-29-410-063-D ** ON A/C NOT FOR ALL

Subtask 12-36-29-865-053-A

C. 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	HYD/HYD PWR/B WARN/& CTL	2702GJ	C12
** 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/HYD POWER/Y	3803GX	N30
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** ON A/C ALL
121VU	HYDRAULIC/Y HYD/PUMP ENG2/MONG	3700GD	Q37
121VU	HYDRAULIC/Y HYD/PUMP ENG2/CTL	3701GD	Q36
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33
** ON A/C ALL
123VU	B HYD/ELEC PUMP	2701GJ	AB09
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 12-36-29-860-104-A

D. Put the aircraft back to the serviceable condition.
(1) Connect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-002).
(2) In section 40VU of the overhead panel, push the PTU pushbutton switch. Make sure that the OFF legend goes off.
(3) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(5) Do the fluid sampling of the applicable hydraulic system (Ref. AMM TASK 12-32-29-281-001).

NOTE: Each contamination (acid number, water content and other contaminations) has a different requirements for the fluid sampling time.

[Rev.10 from 2021] 2026.03.31 22:58:40 UTC