Method and cleaning tool device

A method of cleaning an area (48) located inside a restriction (46) by means of a mechanical cleaning tool (1), the restriction (46) having a smaller cross-sectional dimension than the area (48) to be cleaned, said method comprising the following steps:

• moving the cleaning tool (1) into or through the restriction (46);
• moving a mechanical cleaning body (18) radially out into abutment against the area (48) to be cleaned;
• rotating the cleaning body (18) relative to the area (48) to be cleaned;
• moving the mechanical cleaning body (18) radially in from the area (48) which has been cleaned;
• and
• moving the cleaning tool (1) out from the restriction (46), characterized in that the method further includes:
• applying a force to the cleaning tool, rupturing a rupture element (34) in an attachment (16) for the cleaning body (18);
• moving the attachment (16) axially in a direction of a leading end portion (10) of a tool housing (6) relative to the tool housing (6), whereby an external second inclined plane (36) in the attachment (16) hits an internal third inclined plane (38) in the tool housing (6);
• and
• moving the attachment (16) with the cleaning body (18) radially inwards by a further axial displacement of the attachment (16), bringing about an inward radial displacement of the cleaning body (18).