SEBO Bag Door for 300 and 350 Mechanical Uprights

Lost suction on a SEBO 300 or 350 often starts at the bag door rather than at the bag itself. Part 50215GS is the gray black door used on the mechanical version of those uprights, and it is what presses the compartment shut so that the whole of the airflow has to travel through the filter bag.

The principle behind it is simple: any gap around the door edge is a path of lower resistance than the bag, and air will always take it. Thousands of open-and-close cycles wear the latch and flatten the sealing face, and a door that has been dropped or forced can distort just enough to stand slightly proud of its frame. From then on the machine sounds exactly the same at the motor while pickup falls away at the floor, which is why bag doors get overlooked and new bags get blamed. Checking the door for a firm, even close is worth doing before concluding that the motor is tired.

There is a quick test that costs nothing. Fit a fresh bag, close the door, and run a hand slowly around the join while the machine is running: any draught you can feel at the edge is suction being wasted there rather than delivered at the floor. Note as well that SEBO designates this door specifically as the mechanical type for the 300 and 350, and lists those machines on their own parts sheet under that name, so match the description against your own machine before ordering rather than going by the model number alone.

• Fits: SEBO 300 and 350 mechanical uprights
• Colour: gray black
• Type: mechanical bag door
• Function: closes the bag compartment so all air is drawn through the bag
• Replace when: the door will not latch tight, or the sealing face is worn or cracked
• Part number: 50215GS

Wipe out the seal channel and check how firmly the catch engages when the new door goes on. If you are also servicing the power nozzle on a 300 or 350, the sensor pulley for the power nozzle on those machines is SEBO 5117-01. Searching for a SEBO 300 bag door, a 350 bag door replacement or genuine SEBO part 50215GS brings you to this listing.