250 - 450 Sonifier Chapter 7: Maintenance
User’s Manual Reconditioning the Stack Interface
100-413-016 Rev. C 7 - 5
Lapping Procedure
5. Holding the part to recondition, place the interface surface on the
emery cloth. Grasp the part at the lower end, with your thumb over
the spanner-wrench hole, and lap the part in a straight line across
the emery cloth.
NOTICE
Do not apply downward pressure. The weight of the part alone provides
sufficient pressure.
6. Rotate the part 120 degrees (1/3) to the next hole.
7. Stroke the part an equal number of times at each rotation (2 or 3).
8. Pick up the part and lap it once or twice in the same direction.
9. Rotate the part 120 degrees, placing your thumb over the span-
ner-wrench hole, and lap the part the same number of times as
described above.
10. Rotate the part another 120 degrees to the next spanner-wrench
hole, and repeat the lapping procedure.
Re-examine the mating surface. If necessary, repeat steps 5 through 10 until you
remove most of the contaminant.
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