W DOC AIRBUS | AMM A320F

Installation of the Hydraulic Pressure Hose/Tube Assembly

TASK 29-13-49-400-002-A
Installation of the Hydraulic Pressure Hose/Tube Assembly

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: 400
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
WARNING NOTICE(S)
No specific
Torque wrench: range to between 20.4 and 17.9 lbf.ft (2.77 and 2.43 m.daN ) T
No specific
Torque wrench: range to between 83.4 and 75 lbf.ft (11.31 and 10.17 m.daN ) T
No specific
Torque wrench: range to between 90 and 75 lbf.in (1.02 and 0.85 m.daN ) T
No specific
Torque wrench: range to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in ) T
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
400
POWER PLANT, NACELLES AND PYLONS
195BB
FOR [1000EM2] (ENGINE-2)
447AL
 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 29-13-00-710-002-A
Operational Test of the Yellow Hydraulic System
TASK 29-13-51-860-001-A
Hydraulic Maintenance Procedure after an Engine Installation (with Engine Pump Installed) or after an Engine Pump Installation
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 29-24-00-864-001-A
Depressurize the Yellow Hydraulic System
TASK 71-13-00-410-040-B
Closing of the Fan Cowl Doors
F Installation of the Hydraulic Pressure Hose/Tube Assembly
F Hydraulic Pressure Hose/Tube Assembly
F Hydraulic Pressure Hose/Tube Assembly
F Installation of the Hydraulic Pressure Hose/Tube Assembly
3. Job Set-up
Subtask 29-13-49-860-071-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-24-00-864-001)
   (2) Make sure that the Yellow hydraulic reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).
   (3) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Yellow hydraulic system:
  • on the ground service panel 198CB.
   (4) Make sure that the WARNING NOTICE(S) is (are) in position on the access door 195BB to tell persons not to pressurize the Yellow hydraulic reservoir.
   (5) Make sure that an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the engine 1(2).
   (6) Make sure that the fan-cowl door 447AL is open.
Subtask 29-13-49-941-066-A ** ON A/C NOT FOR ALL
B. Safety Precautions
   (1) On the center pedestal, on the 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 5 minutes before you do this procedure.
   (3) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Yellow hydraulic system:
  • in the cockpit, on the HYD section of the overhead panel 40VU.
   (4) On the 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 the FADEC 1(2).
   (6) Make sure that the CONTAINER 5 L (1.32 USGAL) is below the hydraulic pump to collect the remaining hydraulic fluid in the suction hose/tube (20).
Subtask 29-13-49-865-054-A ** ON A/C NOT FOR ALL
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUHYDRAULIC/Y HYD/PUMP ENG2/MONG3700GDQ37
4. Procedure
Subtask 29-13-49-420-055-A ** ON A/C NOT FOR ALL
A. Installation of the Hydraulic Pressure Hose/Tube Assembly
CAUTION: YOU MUST TORQUE THE BOLTS IN THE SEQUENCE GIVEN. IF YOU DO NOT TORQUE THE BOLTS IN SEQUENCE, YOU CAN DAMAGE THE PRESSURE HOSE/ TUBE.
   (1) Remove the protective covers from the tee-fitting, the ends of the pressure hose/tube (20), the fluid disconnect panel and the union in the hydraulic pump.
   (2) Loosely connect the pressure hose/tube (20) to the fluid disconnect panel. Do not TORQUE the coupling nut at this time.
   (3) Loosely connect the pressure hose/tube (20) to the union on the hydraulic pump. Do not TORQUE the nut at this time.
   (4) Loosely connect the pressure switch tube to the tee-fitting on the pressure hose/tube (20). Do not TORQUE the coupling nut at this time.

PRE SB RA 32029-13
   (5) Attach the pressure hose/tube (20) to the two channels with the clamps (15), bolts (5) and washers (10). Do not TORQUE the bolts (5) at this time.

END OF PRE SB RA 32029-13

POST SB RA 32029-13

PRE SB RA 32029-14
   (6) Attach the pressure hose/tube (20) to the top mid-channel, the bottom mid-channel and the bracket on the engine flange with:

  • The clamps (9), (15) and (16)
  • The bolts (5), (6), (7) and (12) and
  • The washers (8), (10) and (14).
Do not TORQUE the bolts at this time.

END OF POST SB RA 32029-13

END OF PRE SB RA 32029-14

POST SB RA 32029-14

POST SB RA 32029-15

POST SB RA 32029-16
   (7) Attach the pressure hose/tube (20) to the top mid-channel, the bottom mid-channel and the bracket on the engine flange with:
  • The clamps (9), (16) and (26)
  • The bolts (6), (7), (12) and (22) and
  • The washers (8), (14) and (24).
Do not TORQUE the bolts at this time.
   (8) Attach the pressure hose/tube (20) to the bottom bracket with the clamp (15), bolt (5) and washer (10). Do not TORQUE the bolt at this time.

END OF POST SB RA 32029-14

END OF POST SB RA 32029-15

END OF POST SB RA 32029-16

   (9) TORQUE the coupling nuts on the two ends of the pressure hose/tube (20) to between 83.4 and 75 lbf.ft (11.31 and 10.17 m.daN ) T.
   (10) TORQUE the coupling nut on the pressure switch tube to between 20.4 and 17.9 lbf.ft (2.77 and 2.43 m.daN ) T.
   (11) TORQUE the bolts (12) on the engine flange bracket to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in ) T.
   (12) TORQUE the bolts (22) on the bottom mid-channel to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in ) T.
   (13) TORQUE the bolts (6) and (7) on the top mid-channel to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in ) T.
   (14) TORQUE the bolt (5) on the bottom bracket to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in ) T.
   (15) TORQUE the bolt (5) on the top bracket to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in ) T.
   (16) Install the center mount clamp (40) as follows:
     (a) Remove the bolt (25), washer (30) and nut (35) from the band on the pressure hose/tube (20) into its hole in the insert.
     (b) Put the band on the insert and install the bolt (25), washer (30) and nut (35).
     (c) Make sure that the center mount clamp (40) is installed at a distance of 12.30 in. (312.42 mm) below the flange of the pressure hose/tube (20).
     (d) Make sure that the center mount clamp (40) and the hoses have a minimum clearance of 0.40 in. (10.16 mm) from the CFMI hose.
     (e) TORQUE the nut (35) to between 90 and 75 lbf.in (1.02 and 0.85 m.daN ) T.
   (17) Make sure that the center mount clamp (40) and the hoses have a minimum clearance of 0.40 in. (10.16 mm) from the CFMI hose.
   (18) Make sure that there is not too much stress on the pipe hose.
   (19) Clean the fittings and make a color stripe.
   (20) Remove the container.
Subtask 29-13-49-710-060-A ** ON A/C NOT FOR ALL
B. Operational Test
   (1) Pressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-002).
   (2) Do an operational test of the Yellow hydraulic system (Ref. AMM TASK 29-13-00-710-002).
   (3) During the dry motoring of the engine 2, make sure that there are no leaks from the suction hose/tube.
   (4) Make sure that the level of the hydraulic fluid in the Yellow reservoir is correct. If necessary, fill the reservoir (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
Subtask 29-13-49-860-116-A ** ON A/C NOT FOR ALL
C. Do the hydraulic maintenance procedure (Ref. AMM TASK 29-13-51-860-001).
5. Close-up
Subtask 29-13-49-410-063-A ** ON A/C NOT FOR ALL
A. Close Access
   (1) Remove the WARNING NOTICE(S).
   (2) Remove the access platform(s).
   (3) Make sure that the work area is clean and clear of tools and other items.
   (4) Close the left fan-cowl door (Ref. AMM TASK 71-13-00-410-040):
     (a) FOR [1000EM2] (ENGINE-2)
close the door 447AL.
   (5) Close the door 195BB.
[Rev.10 from 2021] 2026.04.01 00:22:27 UTC
"Aviabrain" 2025