Power Knob, for D4 (gray black) Upright The housing has to seal

The housing has to seal around the bag

so the canister runs stable and quiet once more

carefully photograph all wire connections before disconnecting them to ensure correct reinstallation

or uneven rotation

Power Knob, for D4 (gray black) Upright The housing has to sealThis genuine SEBO Power Knob in gray black fits the SEBO D Series D4 canister. It is the knob you turn to power the machine on and off, seating over the switch mechanism and giving a firm, comfortable grip for the control. A power knob that has cracked, stripped, or worn smooth no longer turns the switch cleanly, so the D4 becomes awkward to start and the mechanism below can be left exposed. Fitting a fresh knob restores a positive turn and dependable