Ground milling machine with dust removal device and service tunnel and method

A ground milling machine, in particular a road milling machine, recycler or stabilizer, for machining ground in or counter to a working direction, comprising:

• a machine frame, supported by travel apparatuses, comprising a drive engine;
• a milling drum, rotatably mounted in a milling-drum housing arranged on the machine frame, for removing ground material;
• a milled-material conveying apparatus for transporting the removed ground material from the milling-drum housing to a discharge point;
• and
• a dust extraction apparatus for extracting dust-containing air from a region of the milled-material conveying apparatus, wherein the dust extraction apparatus comprises at least one extraction line, which opens into the region of the milled-material conveying apparatus via an extraction opening, wherein:
• the ground milling machine comprises a left side wall, a right side wall, a front wall and a rear wall, wherein:
• a maintenance tunnel is provided which comprises a tunnel entrance opening and a tunnel exit opening and is designed such that, via the tunnel entrance opening, it establishes an access connection, accessible from outside the ground milling machine, between one of the side walls, the front wall or the rear wall of the ground milling machine and the extraction opening.

A method for the maintenance of a dust extraction apparatus for extracting dust-containing air from a milled-material conveying apparatus of a ground milling machine, in particular a ground milling machine according to claim 10, comprising the steps of:

• a) opening a maintenance tunnel which establishes an access connection between at least one extraction opening and/or extraction hood of the dust extraction apparatus and a side wall, a front wall or a rear wall of the ground milling machine;
• b) performing maintenance on, for example cleaning, the extraction line and/or the extraction hood and/or the extraction opening through the maintenance tunnel;
• and
• c) closing the maintenance tunnel on the side wall, the front wall or the rear wall of the ground milling machine.