The paper presents a possible improvement of uniformity of dust extraction from individual cyclones of a multi-cyclone air filter with modifications of the dust collector design. The suggested dust collector model is divided into segments, with insulated extraction ducts, assigned to a specific number of individual cyclones. The concept of the division into extraction ducts and segments is presented based on the airfilter multicyclone of a special tracked vehicle. A physical and mathematical model of the dust collector segment is presented, and the heights of individual extraction ducts are calculated.