Installation of the Self Sealing Coupling of the Engine-2 Pump Suction

TASK 29-13-38-400-040-A
Installation of the Self Sealing Coupling of the Engine-2 Pump Suction

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

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

WARNING: DO NOT TOUCH THE HYDRAULIC SYSTEM COMPONENTS FOR A SHORT TIME AFTER THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS STAY HOT FOR SOME TIME AND CAN CAUSE INJURY.

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.

ZONE: 400
FIN: 3672GM ** 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	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	COVER - BLANKING
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 900 and 800 lbf.in (10.17 and 9.04 m.daN )
No specific	Torque wrench: range to between 1150 and 1000 lbf.in (13.00 and 11.3 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
No specific	absorbent paper

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
195BB, 198CB, 447AL

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
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 29-13-00-710-002-A	Operational Test of 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 71-13-00-410-040-A	Closing of the Fan Cowl Doors
Engine 2 Pump Suction Self-Sealing Coupling

3. Job Set-up
Subtask 29-13-38-860-051-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 Yellow hydraulic reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) On ground service panel 198CB, make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to pressurize the Yellow hydraulic system.
(4) Make sure that the WARNING NOTICE(S) is(are) in position on access door 195BB to tell persons not to pressurize the Yellow hydraulic reservoir.
(5) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at engine 1(2).
(6) Make sure that the fan cowl door is open.
(7) Make sure that there is a COVER - BLANKING on the adapter assembly (10) (suction hose side).

NOTE: The COVER - BLANKING prevents the flow of hydraulic fluid when the adapter assembly (10) is connected to the pump union.

Engine 2 Pump Suction Self-Sealing Coupling ** ON A/C NOT FOR ALL

Subtask 29-13-38-941-053-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU, make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(3) On the HYD section of overhead panel 40VU in the cockpit, make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to pressurize the Yellow hydraulic system.
(4) On overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(5) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to energize FADEC 1(2).
(6) Put the CONTAINER 5 L (1.32 USGAL) below the suction hose adapter assembly (10) connection to the hydraulic pump to collect the remaining fluid.

4. Procedure
Subtask 29-13-38-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Self Sealing Coupling of the Engine-2 Pump Suction
(1) Remove the COVER - BLANKING from the hydraulic pump union.
(2) Install the adapter assembly (10) on the hydraulic pump:
(a) TORQUE the coupling nut to between 900 and 800 lbf.in (10.17 and 9.04 m.daN )

.
(3) Remove the COVER - BLANKING from the lower end of the suction hose and the adapter assembly (10).
(4) Connect the suction hose to the adapter assembly (10):
(a) TORQUE the coupling nut to between 900 and 800 lbf.in (10.17 and 9.04 m.daN )

Subtask 29-13-38-420-051-A ** ON A/C NOT FOR ALL

B. Preparation for the Test
(1) Connect the hose coupling half to the fluid disconnect panel and tighten the coupling nut with your hand.
(2) TORQUE the coupling nut to between 900 and 800 lbf.in (10.17 and 9.04 m.daN )

Subtask 29-13-38-870-050-A ** ON A/C NOT FOR ALL

C. Bleeding
(1) Put the CONTAINER 5 L (1.32 USGAL) below the connection between the coupling half of the suction hose and the fluid disconnect panel.
(2) Put the absorbent paper on the hose coupling nut.
(3) On the connection between the hose coupling half and the suction hose:
(a) Lightly loosen the upper end of the suction hose from its coupling half with two wrenches.
(4) Let the hydraulic fluid flow from the disconnected connection into the container until there are no air bubbles.
(5) When you complete the bleeding:
(a) TORQUE the hose coupling nut to between 1150 and 1000 lbf.in (13.00 and 11.3 m.daN )

.
(6) Remove and discard the absorbent paper.

Subtask 29-13-38-710-050-A ** ON A/C NOT FOR ALL

D. Operational Test
(1) Pressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-002).
(2) Pressurize the Yellow hydraulic system
(Ref. AMM TASK 29-10-00-863-002).
(3) Do an operational test of the Yellow hydraulic system (Ref. AMM TASK 29-13-00-710-002)
(4) During the dry motoring, make sure that there are no leaks from the connections.
(5) Make sure that the level of hydraulic fluid in the Yellow reservoir is correct. If necessary, fill the reservoir (Ref. AMM TASK 12-12-29-611-001).

NOTE: There must be between 12 and 14 liters of hydraulic fluid in the Yellow reservoir. This is to prevent a decrease in the level of the fluid in the reservoir because of defective bleeding.

5. Close-up
Subtask 29-13-38-410-050-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Remove the CONTAINER 5 L (1.32 USGAL).
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) Make sure that the work area is clean and clear of tools and other items.
(5) Close left fan-cowl door 447AL (Ref. AMM TASK 71-13-00-410-040).
(6) Close access door 195BB.

[Rev.10 from 2021] 2026.04.01 00:20:45 UTC