Installation of the Hydraulic Pressure Hose

TASK 29-13-49-400-807-A
Installation of the Hydraulic Pressure Hose

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

WARNING: YOU MUST NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. THE HYDRAULIC FLUID IS POISONOUS AND CAN BE ABSORBED INTO YOUR BODY. IF YOU ACCIDENTALLY GET HYDRAULIC FLUID IN YOUR EYES, MOUTH OR ON YOUR SKIN, FLUSH WITH WATER AND GET MEDICAL AID.

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

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

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

ZONE: 423

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	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	1	CONTAINER 1 L (1/4 USGAL)
No specific	AR	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)
No specific	AR	WRENCH - STANDARD
No specific	Torque wrench: range to between 840 and 752 lbf.in (9.49 and 8.50 m.daN )
No specific	Torque wrench: range to between 1390 and 1300 lbf.in (15.71 and 14.69 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.PU1-0001)	lint-free cotton cloth
(Material No.PU2-0001)	alcohol, isopropyl
(Material No.PU2-0002)	acetone
(Material No.PU4-0010)	base primer
(Material No.PU4-0011)	activator
(Material No.PU4-0012)	thinner
(Material No.PU6-0003)	lubricant

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
423	UPPER FWD PYLON
195BB, 198CB
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-13-00-710-002-A	Operational Test of the Yellow Hydraulic System
TASK 29-13-49-000-807-A	Removal of the Hydraulic Pressure Hose
TASK 29-13-49-400-807-A	Installation of the Hydraulic Pressure Hose
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Hydraulic Pressure Hose ** ON A/C NOT FOR ALL
Hydraulic Pressure Hose ** ON A/C NOT FOR ALL
Hydraulic Pressure Hose - Adjustment ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 29-13-49-860-123-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 reservoir of the Yellow hydraulic system is depressurized.
(Ref. AMM TASK 29-14-00-614-001).

Subtask 29-13-49-941-109-A ** ON A/C NOT FOR ALL

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

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

(2) Make sure that a WARNING NOTICE(S) is in position to tell persons not to pressurize the Yellow hydraulic system:

On the HYD section of panel 40VU
On access door 198CB, on the ground-service panel of the Yellow hydraulic system.

(3) Make sure that a WARNING NOTICE(S) is in position on access door 195BB to tell persons not to pressurize the reservoir of the Yellow hydraulic system.
(4) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 29-13-49-010-112-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

Subtask 29-13-49-040-071-A ** ON A/C NOT FOR ALL

D. Deactivation of the Thrust Reverser System for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 29-13-49-010-113-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Make sure that the right thrust-reverser cowl-door is open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR
(2) Make sure that an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

4. Procedure
Subtask 29-13-49-420-111-B ** ON A/C NOT FOR ALL

A. Installation of the Hydraulic Pressure Hose

CAUTION: USE A SECOND WRENCH TO HOLD THE MATING PARTS WHEN YOU LOOSEN OR TIGHTEN THE TUBE OR HOSE NUTS. IF YOU DO NOT OBEY THIS CAUTION, YOU CAN TWIST OR CAUSE DAMAGE TO THE TUBES OR HOSES.

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

(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 hydraulic line end-fittings are serviceable.
(4) Make sure that a CONTAINER 1 L (1/4 USGAL) is in position below the hydraulic connections.
(5) Removal of the protection covers:

CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.

(a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine.
(6) Install the hydraulic pressure hose (1).
(a) Apply a thin layer of lubricant (Material No.PU6-0003) to the threads of the hydraulic inline damper on the hydraulic pump. Apply a thin layer of lubricant (Material No.PU6-0003) to the threads of the connector on the pylon fuel-hydraulic panel.
(b) Connect the hydraulic pressure hose (1) to the pylon fuel-hydraulic panel.

NOTE: Do not torque the hydraulic pressure hose (1) fitting at this time.

(d) Adjust the hydraulic pressure hose (1) to keep preload to a minimum. Make sure that there are no kinks in the hydraulic pressure hose (1).
(e) Hold the pylon fuel-hydraulic panel interface with an applicable WRENCH - STANDARD and TORQUE the hydraulic pressure hose (1) fitting to between 1390 and 1300 lbf.in (15.71 and 14.69 m.daN )

.
(f) Attach the hydraulic pressure hose (1) as follows:
1 Hold the hydraulic inline damper with a WRENCH - STANDARD and TORQUE the hydraulic pressure hose (1) fitting to between 840 and 752 lbf.in (9.49 and 8.50 m.daN )

.
2 Hold the hydraulic inline damper with an applicable WRENCH - STANDARD and loosen the hydraulic pressure hose (1) fitting by one turn.
3 Hold the hydraulic inline damper with an applicable WRENCH - STANDARD and TORQUE the hydraulic pressure hose (1) fitting again to between 840 and 752 lbf.in (9.49 and 8.50 m.daN )

.
(7) Apply the torque stripe on the hydraulic pressure hose (1) fittings.
(a) Clean the surface of the hydraulic pressure hose (1) fittings and adjacent surfaces with a clean lint-free cotton cloth (Material No.PU1-0001) and acetone (Material No.PU2-0002) or PU2-0001alcohol, isopropyl. Clean until you remove all contamination you can see.
(b) Clean again the surface of the hydraulic pressure hose (1) fittings and adjacent surfaces with a clean lint-free cotton cloth (Material No.PU1-0001) and acetone (Material No.PU2-0002) or PU2-0001alcohol, isopropyl. Remove the acetone (Material No.PU2-0002) or PU2-0001alcohol, isopropyl with a clean lint-free cotton cloth (Material No.PU1-0001) before the acetone (Material No.PU2-0002) or PU2-0001alcohol, isopropyl becomes dry.
(c) Clean the surface of the hydraulic pressure hose (1) fittings and adjacent surfaces one more time with a clean lint-free cotton cloth (Material No.PU1-0001) .
(d) Mix the base primer (Material No.PU4-0010) with the activator (Material No.PU4-0011) and thinner (Material No.PU4-0012) . Refer to the manufacturer's instructions.
(e) Paint a torque stripe on the hydraulic pressure hose (1) fittings and adjacent surfaces with the base primer (Material No.PU4-0010) mixture.

Subtask 29-13-49-820-052-A ** ON A/C NOT FOR ALL

B. Adjustment of the Hydraulic Pressure Hose

Hydraulic Pressure Hose - Adjustment ** ON A/C NOT FOR ALL

(1) Measure the distance A:
(a) Make sure that the hydraulic pressure hose (1) is installed at a distance of 32.69 -3.8 MM or +3.8 MM (1.287 -0.150 IN. or +0.150 IN.) from the flange of the cuff of the fuel hose (2).
(b) If the distance A is not correct, remove and install the hydraulic pressure hose (1) again (Ref. AMM TASK 29-13-49-000-807), (Ref. AMM TASK 29-13-49-400-807).

Subtask 29-13-49-710-081-A ** ON A/C NOT FOR ALL

C. Operational Test
(1) Do the operational test of the Yellow hydraulic system (Ref. AMM TASK 29-13-00-710-002).
(2) After the dry-motoring, make sure that there were no leaks from the hydraulic connections.
(3) Make sure that the level of the hydraulic fluid in the Yellow reservoir is correct. If necessary, fill the hydraulic reservoir (Ref. AMM TASK 12-12-29-611-001).

5. Close-up
Subtask 29-13-49-410-104-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Remove the CONTAINER 1 L (1/4 USGAL).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the WARNING NOTICE(S).
(4) Close the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR

Subtask 29-13-49-440-060-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 29-13-49-410-105-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Close access doors 198CB and 195BB.
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 00:23:06 UTC