Installation of the Yellow E-Pump Check Valve

TASK 29-24-21-400-001-A
Installation of the Yellow E-Pump Check Valve

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

FIN: 3083GM

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

REFERENCE	QTY	DESIGNATION
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	2	WARNING NOTICE(S)
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 )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
196BB, 198CB

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
4	PACKING	AIPC 29-13-03-15-120
4	PACKING	AIPC 29-13-83-03-140

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-23-11-917-002-A	Installation and Repair of Hydraulic Lines
TASK 20-23-14-910-001-A	Protection of Hydraulic Lines from Vibration and Chafing
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-13-00-710-002-A	Operational Test of the Yellow Hydraulic System
TASK 29-13-14-000-001-A	Removal of the HP Manifold of the Yellow Hydraulic System
TASK 29-13-14-400-001-A	Installation of the HP Manifold of the Yellow Hydraulic System
TASK 29-13-45-610-001-A	Servicing of the HP-Filter
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 29-24-00-710-001-A	Operational Test of the Yellow Auxiliary Power
Yellow E-Pump Check Valve (3083GM)

3. Job Set-up
Subtask 29-24-21-860-051-A

A. Aircraft Maintenance Configuration

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Yellow hydraulic system:

in the cockpit on the hydraulic section 40VU of the overhead panel,
on the ground service panel of the Yellow hydraulic system.

(3) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(4) Make sure that the reservoir of the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(5) Make sure that the access panel 196BB and the access door 198CB are open.
(6) Make sure that the CONTAINER 5 L (1.32 USGAL) is in position below the HP manifold.
(7) Make sure that the isolation coupling of the Power Transfer Unit (PTU) is disconnected (Ref. AMM TASK 29-23-00-860-001).

Subtask 29-24-21-865-051-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
** ON A/C ALL
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

4. Procedure
Subtask 29-24-21-210-050-A

A. Visual Inspection
(1) Do a visual inspection of the check valve (3) for damage and missing parts.

CAUTION: DO A CHECK OF THE YELLOW HP FILTER AND THE YELLOW HP MANIFOLD TO MAKE SURE THAT: - THERE ARE NO MISSING PARTS, AND/OR - THERE IS NO FOREIGN OBJECT DEBRIS. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE HYDRAULIC SYSTEM CAN OCCUR.

(2) If parts are missing, do the subsequent before you install the new check valve:

Examine the Yellow HP filter (3048GM) (Ref. AMM TASK 29-13-45-610-001) and the Yellow HP manifold (Ref. AMM TASK 29-13-14-000-001) and (Ref. AMM TASK 29-13-14-400-001), to find these parts.

Subtask 29-24-21-420-050-A

B. Installation of the Yellow E-Pump Check Valve (3083GM)
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to:

The threads of the check valve (3)
The new AIPC 29-13-03-15-120 PACKING (4) or AIPC 29-13-83-03-140 PACKING (4).

(4) Install the new packing (4) on the check valve (3).
(5) Remove the blanking plugs from the T-fitting (5) and the pipe end-fitting (2).
(6) Install the check valve (3) in the T-fitting (5).
(7) TORQUE the check valve (3) to between 3.58 and 3.47 m.daN (26.40 and 25.59 lbf.ft )

.
(8) Connect the pipe end-fitting (2) on the check valve (3).
(9) Make sure that the clearance between the pipe (1) and the adjacent pipes is correct (Ref. AMM TASK 20-23-14-910-001). If it is not correct, remove and install the pipes again (Ref. AMM TASK 20-23-11-917-002).
(10) TORQUE the pipe end-fitting (2) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

Subtask 29-24-21-865-052-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 NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
** ON A/C ALL
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 29-24-21-710-050-A

D. Test of the Yellow E-Pump Check Valve (3083GM)
(1) Do the operational test of the Yellow hydraulic system (Ref. AMM TASK 29-13-00-710-002).
(2) Do the operational test of the Yellow E-pump (Ref. AMM TASK 29-24-00-710-001).
(3) Make sure that there is no hydraulic leakage from the check valve (3) connections.

5. Close-up
Subtask 29-24-21-860-052-A

A. Put the aircraft back to the serviceable condition.
(1) Connect the isolation coupling of the power transfer unit (PTU) (Ref. AMM TASK 29-23-00-860-002).
(2) Remove the container.
(3) Remove the warning notices from the cockpit and the ground service panel.
(4) Make sure that the work area is clean and clear of tools and other items.
(5) Close the access panel 196BB.
(6) Close the access door 198CB.

[Rev.10 from 2021] 2026.04.01 00:27:04 UTC