IAI America LSA-W21SS - Manual (Page 48)

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[2] Remove the stainless sheet and clean the linear scale.
So that the original tension can be restored when the stainless sheet is installed again later on,
use a marker pen to draw marker lines near the stainless-sheet retainer plates at both ends.
[3] Use an Allen wrench of 2.5 mm across flats to remove the bolts securing the top stainless-sheet
retainer plate. Remove the bolts at both ends of the stainless-sheet retainer plate. Now the
stainless sheet can be removed.
[4] Pull out the stainless sheet from the slider to remove the sheet.
Caution:
The permanent magnets have very strong magnetic force, so if you are not careful, the
stainless sheet may be attracted to the magnet and become bent to the point where it can
no longer be used. Exercise caution.
Marker lines
Pull out.
Stainless sheet
Stainless-sheet retainer plate