Removal of the Solenoid Valve of Engine Pump

TASK 29-11-51-000-809-A
Removal of the Solenoid Valve of Engine Pump

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

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: 430

1. Reason for the Job
This procedure is applicable only on engine pumps P/N 3031863-001 and P/N 3031863-002.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	1	CAP - BLANKING
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	1	COVER - BLANKING, HYDRAULIC RESISTANT
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
430	ENG 1 AIR INTAKE, FAN AND ACCESS GEARBOX
195BB, 197CB
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-11-51-000-808-A	Removal of the Engine Pump
TASK 29-11-51-400-808-A	Installation of the Engine Pump
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
Solenoid Valve of the Engine Pumps P/N 3031863-001 and P/N 3031863-002

3. Job Set-up
Subtask 29-11-51-860-091-A

A. Aircraft Maintenance Configuration
(1) Make sure that the Green hydraulic system is depressurized
(Ref. AMM TASK 29-10-00-864-001)
(2) Depressurize the reservoir of the Green hydraulic system
(Ref. AMM TASK 29-14-00-614-001)

Subtask 29-11-51-941-077-A

B. Safety Precautions
(1) On AIR COND panel 30VU:

Make sure that the APU BLEED pushbutton switch is released (ON legend off).
Put a WARNING NOTICE(S) in position to tell persons not to operate the APU BLEED pushbutton switch.

(2) Open access door 197CB.
(a) On the ground service panel, put WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system.
(3) On the HYD section of panel 40VU:
(a) Put WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system.
(4) Open access door 195BB.
(a) Put WARNING NOTICE(S) in position to tell persons not to pressurize the reservoir of the Green hydraulic system.
(5) On the center pedestal, on ENG panel 115VU:

Make sure that the ENG/MODE selector switch is in the NORM position.
Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
Put WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.

(6) On the ENG section of maintenance panel 50VU:

Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 29-11-51-865-090-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	H12
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33

Subtask 29-11-51-010-078-A

D. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the engine.

4. Procedure
Subtask 29-11-51-020-068-A

A. Removal of the Solenoid Valve of Engine Pumps P/N 3031863-001 and P/N 3031863-002
(1) Disconnection of the electrical connector

CAUTION: DO NOT TWIST OR BEND THE ELECTRICAL HARNESS WHEN YOU DISCONNECT/CONNECT THE ELECTRICAL CONNECTOR. IF YOU DO, YOU CAN CAUSE DAMAGE TO THE HARNESS AND THUS CAUSE ELECTRICAL CIRCUIT DEFECTS.

(a) Disconnect the electrical connector (2) from the solenoid valve (4).
(b) Put a CAP - BLANKING on the disconnected electrical connector (2) and the electrical receptacle.
(c) Safety the electrical connector (2).
(2) Clean the component interface and/or the adjacent area to make sure that no contamination goes into the bore.
(3) Put a CONTAINER 5 L (1.32 USGAL) below the solenoid valve (4) to collect the remaining fluid.
(4) Remove the bolts (3).
(5) Removal of the solenoid valve (4)

CAUTION: MAKE SURE THAT THERE ARE NO LIQUIDS, DUST OR CONTAMINANTS ON THE MOUNTING SURFACE. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE EQUIPMENT CAN OCCUR.

(a) Hold the solenoid valve (4) in the vertical position to the mounting surface and pull it out from the engine pump (1).
(6) Put a COVER - BLANKING, HYDRAULIC RESISTANT on the open port of the engine pump (1).
(7) Make sure that the packings and the backup rings are on the removed solenoid valve (4):

If not, replace the engine pump (Ref. AMM TASK 29-11-51-000-808) and (Ref. AMM TASK 29-11-51-400-808).

[Rev.10 from 2021] 2026.04.01 08:01:30 UTC