1. The bulldozer track roller is the excavator chassis accessories mainly have four wheels: four wheels refer to the track roller, carrier roller, front idler, sprocket; A belt is a track. The track roller plays a supporting role and is located between the lower surface of the left/right beam of the bottom frame and the track, depending on the tonnage of the excavator. Usually there are 5-10 on one side.

2. The main function of the heavy wheel is to support the weight of the excavator and the bulldozer, so that the track can move along the wheel. The function of the track roller is to transfer the weight of the locomotive set to the ground and roll on the tracks. To prevent derailment, the track roller should also be able to prevent lateral relative movement of the track against it.

3. The role of the heavy wheel is to pass the weight of the excavator to the ground. When the excavator runs on the uneven road, the heavy wheel will be impacted by the ground impact, so the heavy wheel is subjected to a large load, poor working conditions, often in the dust, and sometimes immersed in the mud, so it requires a good seal.

4, Track roller often work in mud, water and sand, and withstand strong impact, working conditions are very bad, flange is easy to wear. The requirements of the track roller are wear-resistant rim, reliable bearing seal, low rolling resistance, etc. The processing accuracy of the supporting wheel and axle is relatively high, which generally needs CNC machine tools to achieve the requirements.In general, the bulldozer track roller is used to support the weight of the tractor while rolling on the track rail (rail link) or track plate. It is also used to restrict the track and prevent lateral slippage. When the tractor turns, the weight wheel forces the tracks to slip on the ground.