20T-30-00173 Excavator parts pc40MR Track roller

The PC40MR support wheel is an important part of Komatsu PC40MR excavator crawler chassis “four-wheel belt”. It mainly supports the weight of the excavator and allows the track to move smoothly along the wheels. It is usually composed of wheel body, support wheel shaft, shaft sleeve, sealing ring, end cover and other related components. The design and manufacturing quality of this kind of support wheel has an important influence on the safety and performance of the excavator.