This field study evaluated a newer and older dozer at a construction site. Both dozers performed similar activities in the same location within the construction site. Two operators participated in this study. One operator used the older equipment and the other operator used the newer equipment.
Jolting and jarring measurements were taken at the seat/operator interface and at the floor of the cab. The result of this field study indicates that the newer dozer was better than the older dozer.
Past studies have shown that musculoskeletal disease affecting operators of construction equipment appears to be due to awkward postures (including static sitting), whole body vibration, work intensity, high resistance levers and repetitive motions (Kittusamy and Buchholz 2001; Kittusamy, 2002; Buchholz et al., 1997). It is believed that reducing ergonomic exposures, such as whole body vibration and postural stress, may be an important factor in improving the health, comfort and efficiency of these operators.