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Page Title: Section IV: PRECISION INSTRUMENTS, TOOLS, DIES, JIGS, FIXTURES AND SPARE AND REPLACEMENT PARTS
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TM 38-260
4-16. VALVES
Critical valves shall be either disassembled, cleaned with process C- 11, greased with preservative P-11, and loosely
reassembled without gaskets; or disassembled, cleaned with process C-1, greased with preservative P-11, and
matchmarked, wrapped with greaseproof barrier material, sealed with pressure sensitive tape, tagged, and placed in
humidity controlled storage where possible. Used gaskets shall be discarded.
Section IV.
PRECISION INSTRUMENTS, TOOLS, DIES, JIGS, FIXTURES AND SPARE AND REPLACEMENT
PARTS
4-17. PRECISION INSTRUMENTS
a. Precision measuring and recording instruments, such as air gauges, optical gauging machines, dial indicators,
and like equipment will not require preserving in most instances. Metalworking assemblies of precision instruments shall
be coated with preservative oil P-9, of table 2-1.
b.  Pens and recording-type instruments shall be removed and cleaned with a commercial cleaner or one
recommended by the manufacturer.
c. Small items that do not have precision working assemblies shall be preserved by coating with preservative
compound P-2, grade 2, or P-3, grade 3, of table 2- 1.
4-18. TOOLS, DIES, JIGS, AND FIXTURES
a. Tools and tool accessories shall be cleaned, dried, preserved, and packed in accordance with PPP-P-40.
b. Special tooling, dies, jigs, and fixtures shall be removed from the basic unit prior to shipping to Government
storage as part of a package. Each item shall be properly identified to the machine tool, press, or other item of plant
equipment to which it was attached when in use.
4-19. SPARE AND REPLACEMENT PARTS
a. Spare and replacement parts include motors, coolant pumps, anti-friction bearings, and similar items for the
repair and maintenance of Government-owned plant equipment.
b. Items that have been used or contaminated due to prolonged storage shall be cleaned, dried, and preserved,
as applicable.
4-14

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