Sinclair Surface Prep Machine 390 - Manual (Page 5)

Assembly of mounting discs, pads and brushes
Lay the machine down on the handle. Thus the support of the discs is accessible. Put
the mounting disc on the actuation and lock it by turning anti-clockwise.
Assembly of the vacuum unit
Assemble the vacuum unit with two supports to the handle.
- insert lower connector into the plastic mounting
- lock the upper connector by shifting the upper plastic mounting down
The upper plastic mounting can be shifted by loosening the screws.
- Mount discs and brushes as described in item
- Connect the vacuum ring and the vacuum with the tubes
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