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TM 55-2840-231-23
APPENDIX H
GENERAL MAINTENANCE PRACTICES
H-1.
APPENDIX OVERVIEW.
This appendix contains general maintenance practices. Maintenance personnel will become familiar
with them before starting to work on the engine or on any of the engine subassemblies or components.
Be sure to comply with all assembly lubrication procedures. Failure to do so could result in oil system
contamination.
•Antiseize compounds will not be used to lubri-
cate a surface that will come in contact with
engine oil.
•Do not use a lubricant on carbon seals.
The lubricants used during assembly are listed under Expendable Supplies and Materials in appendix D.
Be sure all surfaces that need lubrication are clean and free of moisture and solvents before applying
the lubricant.
Do not contaminate highly-finished surfaces with body moisture or other agents before lubricating.
This could cause corrosion after lubricant is applied.
Lubricating oil (item 5, Appendix D) is the type of oil meant wherever the term “light coat of oil” or
the word "oil" is used in assembly procedures.
Unless otherwise noted, use a light coat of lubricating oil to lubricate threads of bolts, screws, studs,
coupling nuts and fasteners used in assembly. Failure to do this may cause bolts to be improperly torqued
or may cause shank nuts to become loosened during assembly, and may cause bolt seizure and/or failure
during removal.
H-3.
USE OF JACKING SCREWS.
Jacking screws are used to remove tight-fitting covers and flanged parts.
Bolts referenced in disassembly procedures are used as jacking screws.
In procedures that specify using jacking screws, do the following:
a.
Manually thread bolts into holes until they bottom.
b.
Alternately turn bolts clockwise one-quarter of a turn, one at a time, until part being jacked can
be freely removed from engine.
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