B. Open the fan cowl doors (Ref. TASK 71-13-00-010-040):
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
4. Procedure
_________
(Ref. Fig. 805/TASK 72-63-00-991-315, 806/TASK 72-63-00-991-316) Subtask 72-63-00-020-066
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:
- IDG (Ref. TASK 24-21-51-000-040)
- starter (Ref. TASK 80-11-10-000-002) Subtask 72-63-00-020-067
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 TOOL SET - JACK SCREW (856A1130G06).
(3) Remove and discard O-ring (150). Subtask 72-63-00-020-068
C. Removal of the Carbon Ring Assembly
(1) Prepare the tool set 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).
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Magnetic Seal Assembly (Typical for the IDG and Starter Drive Pads)
Figure 805/TASK 72-63-00-991-315
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Removal of the Carbon Ring Assembly (Typical, at IDG Drive Pad) Figure 806/TASK 72-63-00-991-316
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(4) Attach the slide hammer 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 storage box and send them to the repair shop.
Subtask 72-63-00-420-063
D. Installation of the Magnetic Seal Assembly (type equipped with the thrust ring)
CAUTION : DO NOT USE THIS SOLVENT NEAR FLAMES OR HEAT, BECAUSE THIS
_______ SOLVENT IS FLAMMABLE. DO NOT BREATHE THE GASES RELEASED FROM SOLVENT, DO NOT LET IT TOUCH YOUR SKIN OR CLOTHING AND MAKE SURE YOU HAVE A GOOD FLOW OF AIR, BECAUSE THIS SOLVENT IS DANGEROUS TO YOUR SKIN, EYES AND LUNGS.
R (1) With acetone (Material No. CP1039) or isopropyl alcohol (Material No. R CP1041) or stoddard solvent (Material No. CP2011) or ardrox 552 R (Material No. CP2559) or turco ind 79 (Material No. CP2560) or mag-R chem teksol (Material No. CP2566) or degreasol 99 R (Material No. R CP2584) or mag-chem skysol (Material No. CP2656) remove the coked oil R which possibly remains on the gearshaft area related to the rotary R part of the magnetic seal, to prevent possible damage to the O-ring R (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 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 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).
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- lubricate a new 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 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).
(5) Lubricate the carbon ring mating face and the gearshaft with engine oil (Material No. CP2442).
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.
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