Vehicle for loosening and sucking up contaminants from wastewater sewers and sludge pits, - having a pivotable telescopic boom which can be positioned over the opening of the wastewater sewer or the sludge pit, - having a high-pressure hose which is mounted on a hose reel such that it can be wound up and unwound and which can be guided out of vehicle , and can be guided into the telescopic boom , approximately parallel to the longitudinal axis of the vehicle , - having a suction hose which can be pulled into a storage unit on the vehicle and can be pulled out of said storage unit, - wherein high-pressure hose and suction hose can be guided together in the telescopic boom , - wherein the telescopic boom is fastened rotatably to a horizontally arranged rotary bearing , - wherein the rotary bearing has roller bodies for the high-pressure hose , which are arranged in a circular manner around the axis of the rotary bearing , - wherein the high-pressure hose , in a first position of the telescopic boom , at least sectionally bears against the roller bodies of the rotary bearing and, in a second position of the telescopic boom , is guided from the hose reel into the telescopic boom without being in contact with the roller bodies of the rotary bearing , - characterized in that - the rotary bearing has support rollers for the high-pressure hose , which are arranged around the axis of the rotary bearing , - the support rollers can be moved in such a way that, in a first position , they are present approximately at the height of the roller bodies , so that the high-pressure hose is guided between the roller bodies and the support rollers , and, in a second position , they are present above or below the roller bodies . - having a pivotable telescopic boom which can be positioned over the opening of the wastewater sewer or the sludge pit, - having a high-pressure hose which is mounted on a hose reel such that it can be wound up and unwound and which can be guided out of vehicle , and can be guided into the telescopic boom , approximately parallel to the longitudinal axis of the vehicle , - having a suction hose which can be pulled into a storage unit on the vehicle and can be pulled out of said storage unit, - wherein high-pressure hose and suction hose can be guided together in the telescopic boom , - wherein the telescopic boom is fastened rotatably to a horizontally arranged rotary bearing , - wherein the rotary bearing has roller bodies for the high-pressure hose , which are arranged in a circular manner around the axis of the rotary bearing , - wherein the high-pressure hose , in a first position of the telescopic boom , at least sectionally bears against the roller bodies of the rotary bearing and, in a second position of the telescopic boom , is guided from the hose reel into the telescopic boom without being in contact with the roller bodies of the rotary bearing , - characterized in that - the rotary bearing has support rollers for the high-pressure hose , which are arranged around the axis of the rotary bearing , - the support rollers can be moved in such a way that, in a first position , they are present approximately at the height of the roller bodies , so that the high-pressure hose is guided between the roller bodies and the support rollers , and, in a second position , they are present above or below the roller bodies . <EOS>