(2) Visually check the general condition of the component and ensure it has not sustained any damage before installation.
(3) Check that mounting faces and seal grooves are clean and not deteriorated.
(4) Use only the tools designed specifically for the operation.
(5) Check that threaded sections protrude by one thread relative to the nuts and chamfers at completion of final torquing.
(6) Comply with all the tightening torque values specified in the relevant sequence of operations.
(7) Use gloves to handle bearings and any other parts prone to oxidation.
(8) Cold shrink installation of bearings (chilling in liquid nitrogen or any other medium) is strictly prohibited.
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SEALS - MAINTENANCE PRACTICES
_____________________________ TASK 70-21-00-918-002 Seals (Preformed Packings and O-rings) and Gaskets
1. Reason for the Job
__________________
The data in this procedure is applicable to all installations that use seals
or gaskets.
Seal removal, installation and lubrication instructions is given in this
procedure.
This procedure tells you when you can continue to use a gasket.
2. Job Set-up Information
______________________
Not Applicable
3. Job Set-up
__________ Subtask 70-21-00-869-051
A. Not Applicable.
4. Procedure
_________ Subtask 70-21-00-020-051
A. Removal of the seal.
(1) Do not remove the seals with a sharp or pointed tool (knife-blade or a scriber) which could can cause damage to the surface of the parts.
Subtask 70-21-00-640-051
B. Lubrication of the seal.
(1) Lubricate the seals with lubricants recommended in the installation procedure.
(2) Apply a light layer of engine oil to the O-rings.
(a) If you apply too much lubricant, you can prevent the correct seal installation and can cause contamination.
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Subtask 70-21-00-420-051
C. Installation of the seal.
(1) Use only new seals and rubber items during installation operations.
(2) Make sure the seals are in good condition and free from cuts or gouges.
(3) During the seal installation, be carefull to install the seal correctly.
(a) Make sure the seal groove (recess) is free from sharp edges.
(4) For O-rings that must be installed over threads or splines, you must use a conical sleeve, without burrs or sharp edges, to prevent damage to seal.
Subtask 70-21-00-210-051
R D. Continued use of the gaskets.
R (1) Examine the gaskets with imbedded flexible seal material for the R limits that follow:
(a) Examine for nicks, cuts, gouges or openings across the surface of the seal material.
1 These are not permitted.
_
(b) Examine for hard or britted seal material. 1 These are not permitted.
_
(c) Examine the surface of the seal material for deformation that could cause a blockage of the seal.
1 These are not permitted.
_ R
R (d) Examine the full length of the seal surface.
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E. Maintenance of the aluminium gaskets.
(1) Remove the lifted metal in the bolt hole area with a fine polishing stone or equivalent.
(a) Be careful not to cause damage to the seal material.
(2) Cut all thin, lacy, seal material that extends beyond the normal seal material on the aluminium surfaces.
(a) Be careful not to cut or loosen the bottom of the material.
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LOCKING - MAINTENANCE PRACTICES
_______________________________
TASK 70-22-00-911-002
Locking Procedures
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