Hoefer PR250 - Manual (Page 12)

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p6
7. Platform Installation (continued)
Remove the non-skid rubber
mat to access the screws.
Remove 4 screws located in
the center of the platform. Insert the 4 screws,
through the platform onto
the shaker head and tighten. Replace the non-slip
mat on the platform.
Remove the two
middle clamps to
access the screws. Inserting 4 screws, through
the platform onto the
shaker head and tighten. Replace the two
middle clamps into
the platform.