3-1
Chapter 3
Maintenance
• Routine Maintenance . . . . . . . . . . 3-1
• Replacement Parts. . . . . . . . . . . . . 3-2
Routine Maintenance
Routine maintenance is limited to keeping
the extensometer clean and the moving parts
free. No lubrication is required. All hydraulic
fluid, dust and other foreign matter should be
kept off all parts, particularly under the
cover. commercial solvents, such as
Chlorothene N.U. and Methyl Ethyl Ketone
(MEK) may be used sparingly with a soft
brush or soft lint-free cloth, but do not
immerse the extensometer in solvent. Low
pressure compressed air may be used
cautiously for cleaning and drying, but do not
direct the airstream directly into the cover.
Dullness and small nicks in the knife edges
may be dressed using a fine whetstone,
careful preserving the edge bevel. When
done on a powered wheel, cooling lubricant
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