Installation of the Magnetic Seal [CFMI]

TASK 72-63-00-400-005-A
Installation of the Magnetic Seal

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

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
The magnetic seal and sealol seal are interchangeable ; you can install one seal or the other.
There is two configurations of magnetic seal for Starter and Integrated Drive Generator (IDG) drive pads:

configuration one is the basic configuration,
configuration two (POST SB 72-193) is fitted with a thrust ring.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
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 )

B. Consumable Materials

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

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
50	O-RING	AIPC 72-63-00-02-025
70	O-RING	AIPC 72-63-00-02-060
50	O-RING	AIPC 72-63-00-03-010
70	O-RING	AIPC 72-63-00-03-060
50	O-RING	AIPC 72-63-00-05-120
70	O-RING	AIPC 72-63-00-05-170
50	O-RING	AIPC 72-63-00-06-060
70	O-RING	AIPC 72-63-00-06-100

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-790-002-A	Fuel or Hydraulic or Oil Leakage Limits
TASK 71-00-00-790-004-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-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
Accessory Gearbox Assembly
Removal of the Carbon Ring Assembly at IDG or Starter Drive Pad
Magnetic Seal Assembly of the Hydraulic Pump Drive Pad
Removal of the Carbon Ring Assembly at Fuel Pump or Hydraulic Pump Drive Pad
Magnetic Seal Assembly (without thrust ring)
Magnetic Seal Assembly (equipped with thrust ring)
Magnetic Seal Assembly of the IDG Drive Pad
Magnetic Seal Assembly of the Starter Drive Pad
Magnetic Seal Assembly of the Fuel Pump Drive Pad

3. Job Set-up
Subtask 72-63-00-860-053-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).

Subtask 72-63-00-010-060-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 72-63-00-110-051-A ** ON A/C NOT FOR ALL

A. Removal of the coked oil

CAUTION: THE MAGNETIC SEALS ARE MATCHED ASSEMBLIES. IF ONE OF THE COMPONENTS IS DAMAGED, YOU MUST REPLACE THE COMPLETE SEAL.

(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 (70) at installation.

Subtask 72-63-00-420-057-A ** ON A/C NOT FOR ALL

B. Installation of the Magnetic Seal
(1) Removal of the magnetic seal assembly

CAUTION: USE GLOVES WHEN YOU HANDLE THE MAGNETIC SEALS TO PREVENT CONTAMINATION. MAKE SURE THAT THE FACE OT THE MAGNETIC SEAL WHICH TOUCHES THE CARBON SEAL IS THE POLISHED SURFACE.

(a) Remove the magnetic seal assembly from the storage box. Put on gloves to do this.
(2) Apply a thin layer of engine oil (Material No.CP2442) to the following new 0-rings:

AIPC 72-63-00-05-170 O-RING (70) for the fuel pump drive pad,
AIPC 72-63-00-02-060 O-RING (70) for the hydraulic pump drive pad,
AIPC 72-63-00-06-100 O-RING (70) for the starter drive pad,
AIPC 72-63-00-03-060 O-RING (70) for the IDG drive pad.

(3) Install the 0-ring (70) in the inner groove of the carbon ring assy (60).
(4) Apply a thin layer of engine oil (Material No.CP2442) to the following new 0-rings:

AIPC 72-63-00-05-120 O-RING (50) for the fuel pump drive pad,
AIPC 72-63-00-02-025 O-RING (50) for the hydraulic pump drive pad,
AIPC 72-63-00-06-060 O-RING (50) for the starter drive pad,
AIPC 72-63-00-03-010 O-RING (50) for the IDG drive pad.

(5) Install the 0-ring (50) in the outer groove of the seal housing (20).
(6) Removal of the carbon ring assy.

CAUTION: DO NOT HIT THE CARBON MATING FACE OR SLIDE IT ON THE MAGNETIZED MATING RING WHEN YOU REMOVE THE ROTATING RING.

(a) Separate the carbon ring assy (60) from housing assy (20). Remove the tissue paper and apply a thin layer of engine oil (Material No.CP2442) to the carbon mating face.
(7) Installation of the carbon ring assembly.

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.

(a) Very carefully install the carbon ring assembly (60) against the mating housing assy (20). Make sure that the carbon mating face touches the polished face on the magnetic ring. Align the rotating ring assembly with the housing bore.
(8) Moving of the magnetic seal assembly.

CAUTION: DO NOT TAP THE MAGNETIC SEAL HOUSING TO INSTALL IT IN ITS RECESS. TO PREVENT SEPARATION OF THE MAGNETIC SEAL COMPONENTS IT IS IMPORTANT TO DO AS DESCRIBED BELOW.

(a) Engage the magnetic seal assembly in the AGB until the O-ring (50) of the magnetic seal housing is fully against the bearing housing.
(9) Apply a thin layer of graphite grease (Material No.CP2101) to the 3 nuts (40) and washers (30), and progressively lower the assembly with the 3 nuts until the seal housing flange is fully against the face of the bearing housing.
(10) TORQUE the nuts to between 33 and 29 lbf.in (0.37 and 0.33 m.daN )

5. Close-up
Subtask 72-63-00-410-057-A ** ON A/C NOT FOR ALL

A. 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
(3) Remove the WARNING NOTICE(S).

Subtask 72-63-00-710-053-A ** ON A/C NOT FOR ALL

B. Do a leak check of the replacement seal (Ref. AMM TASK 71-00-00-790-004). If there are leaks (Ref. AMM TASK 71-00-00-790-002).

[Rev.10 from 2021] 2026.04.01 12:54:42 UTC