DOC AIRBUS | AMM A320FReplacement of a Magnetic Seal (IDG and Starter Drive Pads). [CFMB]
TASK 72-63-00-300-004-A
Replacement of a Magnetic Seal (IDG and Starter Drive Pads).
1. Reason for the Job
To replace a leaky magnetic seal by another magnetic seal at:
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 72-63-00-941-063-A ** ON A/C NOT FOR ALL
Subtask 72-63-00-020-066-A ** ON A/C NOT FOR ALL
Subtask 72-63-00-942-052-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:43:53 UTC
Replacement of a Magnetic Seal (IDG and Starter Drive Pads).
1. Reason for the Job
To replace a leaky magnetic seal by another magnetic seal at:
- The Integrated Drive Generator (IDG) drive pad,
- The starter drive pad.
NOTE: You can find two types of carbon seal installed on these Accessory Gearbox (AGB) drive pads: a magnetic seal assembly or a sealol seal assembly. You can replace a magnetic seal assembly either, by a new magnetic seal assembly (the one equipped with a thrust ring) or, as an alternate, by a new sealol seal assembly.
If you replace a magnetic seal by a sealol seal, remove the magnetic seal as specified in this procedure and go to (Ref. TASK 72-63-00-300-00200) for the installation of the sealol seal. 2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | CONTAINER - STORAGE |
| No specific | AR | HAMMER - SLIDE |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 33 and 29 lbf.in (0.37 and 0.33 m.daN )  | |
| 856A1130 | 1 | TOOL SET - JACK SCREW |
| 856A3576 | 1 | SEALOL AND MAGNETIC SEALS-R/I |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP1039) | acetone |
| (Material No.CP1041) | isopropyl alcohol |
| (Material No.CP2011) | stoddard solvent |
| (Material No.CP2101) | graphite grease |
| (Material No.CP2442) | engine oil |
| (Material No.CP2559) | ardrox 552 |
| (Material No.CP2560) | turco ind 79 |
| (Material No.CP2566) | mag-chem teksol |
| (Material No.CP2584) | degreasol 99 R |
| (Material No.CP2656) | mag-chem skysol |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 150 | O-RING | AIPC 72-63-00-03-010 |
| 130 | O-RING | AIPC 72-63-00-03-060 |
| 130 | O-RING | AIPC 72-63-00-06-010 |
| 150 | O-RING | AIPC 72-63-00-06-060 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-21-51-000-040-B | Removal of the Integrated Drive Generator - IDG 1(2) |
| TASK 24-21-51-400-040-E | Installation of the Integrated Drive Generator (IDG) 1(2) (New EPGS) |
| TASK 71-00-00-790-002-B | Fuel or Hydraulic or Oil Leakage Limits |
| TASK 71-00-00-790-006-A | Leak Check after the Replacement of a Sealol Seal or a Magnetic Seal on the AGB Drive Pads of the IDG, Hydraulic Pump, Starter and Fuel Pump |
| TASK 71-13-00-010-040-B | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-B | Closing of the Fan Cowl Doors |
| TASK 80-11-10-000-002-A | Removal of the Pneumatic Starter |
| TASK 80-11-10-400-002-A | Installation of the Pneumatic Starter |
Magnetic Seal Assembly of the IDG Drive PadSubtask 72-63-00-941-063-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) 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) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 72-63-00-010-072-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) 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) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
B. Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 72-63-00-020-066-A ** ON A/C NOT FOR ALL
A. Preparation for the Removal of a Magnetic Seal
(1) Depending on the drive pad on which you have to replace the magnetic seal assembly, remove one of these units:
Subtask 72-63-00-020-067-A ** ON A/C NOT FOR ALL (1) Depending on the drive pad on which you have to replace the magnetic seal assembly, remove one of these units:
- IDG (Ref. AMM TASK 24-21-51-000-040)
- starter (Ref. AMM TASK 80-11-10-000-002)
B. Removal of the Magnetic Seal Housing Assembly
(1) Remove the 3 nuts (170) and washers (160) which attach the magnetic seal housing assembly (180) to the pad.
(2) Remove the magnetic seal housing assembly (180) with jackscrews P2 from the 856A1130 TOOL SET - JACK SCREW (856A1130G06/G10).
(3) Remove and discard O-ring (150).
Subtask 72-63-00-020-068-A ** ON A/C NOT FOR ALL (1) Remove the 3 nuts (170) and washers (160) which attach the magnetic seal housing assembly (180) to the pad.
(2) Remove the magnetic seal housing assembly (180) with jackscrews P2 from the 856A1130 TOOL SET - JACK SCREW (856A1130G06/G10).
(3) Remove and discard O-ring (150).
C. Removal of the Carbon Ring Assembly
(1) Prepare the tool set 856A3576 SEALOL AND MAGNETIC SEALS-R/I (856A3576G01), with handle P12, sleeve P13, and collet P14.
(2) Engage the tool assembly (856A3576G01), in the AGB drive pad, until the jaws of the collet are behind the carbon ring assembly (140).
(3) Tighten the sleeve by hand until the collet is tight against the carbon ring assembly (140).
(4) Attach the HAMMER - SLIDE to the handle and remove the carbon ring assembly (140) from the gearshaft.
(5) Loosen the sleeve and remove the carbon ring assembly (140) from the tool.
(6) Remove and discard the O-ring (130).
(7) Put the removed parts in a CONTAINER - STORAGE and send them to the repair shop.
Subtask 72-63-00-420-063-A ** ON A/C NOT FOR ALL (1) Prepare the tool set 856A3576 SEALOL AND MAGNETIC SEALS-R/I (856A3576G01), with handle P12, sleeve P13, and collet P14.
(2) Engage the tool assembly (856A3576G01), in the AGB drive pad, until the jaws of the collet are behind the carbon ring assembly (140).
(3) Tighten the sleeve by hand until the collet is tight against the carbon ring assembly (140).
(4) Attach the HAMMER - SLIDE to the handle and remove the carbon ring assembly (140) from the gearshaft.
(5) Loosen the sleeve and remove the carbon ring assembly (140) from the tool.
(6) Remove and discard the O-ring (130).
(7) Put the removed parts in a CONTAINER - STORAGE and send them to the repair shop.
D. Installation of the Magnetic Seal Assembly (type equipped with the thrust ring)
(2) Get a new magnetic seal assembly.
(3) For the starter drive pad:
(6) Engage the magnetic seal assembly on the gearshaft until the O-ring (150) of the housing is fully against the AGB pad.
(7) Lubricate the threads of the 3 studs with graphite grease (Material No.CP2101) .
(8) Install washers (160) and nuts (170) and continuously install the magnetic seal assembly until the housing flange is fully against the AGB pad.
(9) TORQUE the nuts (170) to between 33 and 29 lbf.in (0.37 and 0.33 m.daN ).
(10) Depending on the drive pad on which you have replaced the magnetic seal assembly, install one of these units:
Subtask 72-63-00-410-070-A ** ON A/C NOT FOR ALL WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(1) With acetone (Material No.CP1039) or isopropyl alcohol (Material No.CP1041) or stoddard solvent (Material No.CP2011) or ardrox 552 (Material No.CP2559) or turco ind 79 (Material No.CP2560) or mag-chem teksol (Material No.CP2566) or degreasol 99 R (Material No.CP2584) or mag-chem skysol (Material No.CP2656) remove the coked oil which possibly remains on the gearshaft area related to the rotary part of the magnetic seal, to prevent possible damage to the O-ring (130) at installation. (2) Get a new magnetic seal assembly.
CAUTION:
USE GLOVES WHEN YOU HANDLE THE MAGNETIC SEAL COMPONENTS TO PREVENT CONTAMINATION. MAKE SURE THAT THE FACE OF THE MAGNETIC SEAL WHICH TOUCHES THE CARBON RING IS THE POLISHED SURFACE.
(a) Remove the magnetic seal assembly from its packaging. (3) For the starter drive pad:
- lubricate a new AIPC 72-63-00-06-010 O-RING (130) with engine oil (Material No.CP2442) . Install the O-ring (130) in the inner groove of the carbon ring assembly (140).
- lubricate a new AIPC 72-63-00-06-060 O-RING (150) with engine oil (Material No.CP2442) . Install the O-ring (150) in the outer groove of the magnetic seal housing assembly (180).
- lubricate a new AIPC 72-63-00-03-060 O-RING (130) with engine oil (Material No.CP2442) . Install the O-ring (130) in the inner groove of the carbon ring assembly (140)
- lubricate a new AIPC 72-63-00-03-010 O-RING (150) with engine oil (Material No.CP2442) . Install the O-ring (150) in the outer groove of the magnetic seal housing assembly (180).
CAUTION:
MAKE SURE THAT PARTICLES; EVEN OF EXTREMELY SMALL SIZE, ARE NOT LEFT BETWEEN THE POLISHED FACE OF THE MAGNETIC RING AND THE CARBON FACE OF THE ROTATING RING ASSEMBLY DURING INSTALLATION. OTHERWISE LEAK CAN OCCUR.
CAUTION:
DO NOT HIT THE CARBON MATING FACE OR SLIDE IT ON THE MAGNETIC MATING RING WHEN YOU INSTALL THE CARBON RING ASSEMBLY.
(a) Very carefully, install the carbon ring assembly (140) against the polished face of the magnetic ring. CAUTION:
DO NOT HIT THE MAGNETIC SEAL HOUSING DURING THE INSTALLATION TO PREVENT DAMAGE TO THE MAGNETIC SEAL COMPONENTS.
1 Align the carbon ring assembly with the housing bore. (6) Engage the magnetic seal assembly on the gearshaft until the O-ring (150) of the housing is fully against the AGB pad.
(7) Lubricate the threads of the 3 studs with graphite grease (Material No.CP2101) .
(8) Install washers (160) and nuts (170) and continuously install the magnetic seal assembly until the housing flange is fully against the AGB pad.
(9) TORQUE the nuts (170) to between 33 and 29 lbf.in (0.37 and 0.33 m.daN )
. (10) Depending on the drive pad on which you have replaced the magnetic seal assembly, install one of these units:
- IDG (Ref. AMM TASK 24-21-51-400-040)
- starter (Ref. AMM TASK 80-11-10-400-002)
E. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 72-63-00-710-058-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
F. Do a leak check of the replacement seal (Ref. AMM TASK 71-00-00-790-006). If there are leaks (Ref. AMM TASK 71-00-00-790-002).
5. Close-upSubtask 72-63-00-942-052-A ** ON A/C NOT FOR ALL
A. Remove the WARNING NOTICE(S).