SUHNER ABRASIVE TURBO TRIM SH 350 Hook Originalbetriebsanleitung Seite 23

To fill the grease cup, press in the button. Insert the grease
gun into the nipple on the grease cup, and press strongly
to charge it with grease. Stop when the button has moved
up. Press the grease button at regular intervals and after
cleaning and connecting the hand piece.
23