TM 55-2840-231-23
The special tools identified in this manual are designed specifically for use on this engine. Avoid the
use of makeshift tools.
Do not use brass or lead tools when installing or disassembling hot section
parts. Brass and lead contaminants can ultimately lead to part failure.
Before using tools, be sure that they are clean and free from nicks, dents, or burrs that could damage
engine parts.
Do not use cadmium-plated tools on titanium parts. Doing so may cause
parts to fail during subsequent use.
Titanium parts require special care. When cadmium-plated tools are used on titanium parts, it is possible
for particles of cadmium to become embedded in the titanium. At temperatures above 600°F (316°C), the
cadmium can cause the titanium to become brittle, resulting in overstressed areas and possible cracking.
Therefore, cadmium-plated tools will not be used on titanium parts.
Do not use screwdrivers or sharp metal rods to separate engine parts. If engine parts are bound or seized,
use wooden wedges to separate them.
Do not use hammers with metal heads to drive any tool on any part of the engine; instead use hammers
with plastic, nylon, or rawhide heads when driving is required.
Do not leave tools or parts on any part of the engine, particularly near inlet, during maintenance. Return
each tool to its proper place immediately after use.
Use approved thermally insulated gloves.
Lift all heavy parts with proper lifting devices to prevent damage to the part or injury to personnel. Do
not use engine components as handles when moving the engine.
Never mark engine parts with a lead pencil. Such deposits can cause corrosion
and burn-out of parts. Do not use either the electrolytic-etch or electric-arc
scribe methods to mark engine parts.
Use dye or equivalent to temporarily mark engine parts (item 48, Appendix D).
1-50. Cleanliness.
Keep dirt and other foreign material out of the engine. Use the recommended covers to seal openings in
the dismantled engine and in disassembled parts.
Place each engine part on a clean surface as it is removed from the engine. Wrap small parts in barrier
material (item 15, Appendix D), seal with tape (item 3, Appendix D) and tag (or otherwise identify) the
package with engine and module serial number, part nomenclature, and part number.
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