Problems relating to the adoption of large-diametered guide rollers in 4 wheel drive large bulldozers are studied. Advantageous impacts in improving maneuvrability resulting from the increase of angle of inclination of master pins are analysed. Changes in relationships between steering angles of right and left wheels due to the adoption of larger angle of inclination for master pins are discussed. Measures that should be taken in steering gear design with increased angle of inclination of kingpins are described.