Products Description

Product Details

Maintains the straight-line movement of the track and reduces travel resistance

Maintains straight-line track travel and reduces rolling resistance. The SD13 carrier roller sits above the track frame and supports the upper run of the chain as it returns to the drive sprocket. When the carrier roller is worn or seized, the upper run loses support, sags, and repeatedly slaps against the track frame, creating additional resistance. Higher rolling resistance forces the bulldozer to consume more power to maintain the same travel speed, which increases fuel consumption. For earthmoving operations running 8 to 10 hours a day, this wasted power shows up directly on the diesel bill. With the carrier roller in proper condition, the upper run stays in straight-line travel and rolling resistance remains within design range.

Prevents the track chain from damaging the track frame, protecting high-value components

Prevents chain from grinding into the track frame and protects high-value components. When the carrier roller fails, the upper track run loses its support height and the chain drops onto the top surface of the track frame, continuously rubbing against it during travel. The track frame is one of the most expensive structural components in the undercarriage system. Once the chain wears a groove into it or grinds through, it requires full replacement or welding repair, with downtime and repair costs far exceeding the price of a new carrier roller. The SD13 has only two carrier rollers per side, making replacement cost a small fraction of overall undercarriage maintenance. Replacing a carrier roller at the early stage of failure prevents major repair of the track frame and track chain.

The sealing structure controls oil leakage and reduces unplanned downtime

Seal design controls leakage and reduces unplanned downtime. The SD13 carrier roller uses a sealed-for-life design with a floating seal. Under normal conditions, the grease fill lasts the entire service interval and the roller requires no routine maintenance. However, if the seal fails and grease leaks out, the internal bearing runs without lubrication, generates heat, and seizes within a short period. Once the carrier roller seizes, the track chain drags across its surface, creating flat spots and abnormal noise, at which point the machine must be stopped for replacement. For an earthmoving project running on a schedule, unplanned downtime costs not only the parts but also operator hours, schedule delays, and knock-on effects on subsequent operations. Checking the seal area for leakage signs during routine inspection and replacing the carrier roller at the early stage of leakage turns unplanned downtime into a planned maintenance event.

About STONE

Stone is a leading supplier of engineering machinery parts, focusing on providing high-quality parts for mining companies. Since its establishment in 2004, we have been based in Shanghai, China, and have built our own brand STONE, becoming a trusted choice in the industry. We are committed to providing a variety of parts including bulldozers, excavators and wheel loaders for well-known brands such as Caterpillar and Komatsu. Our product line covers a full range of OEM parts, such as Track Chain, Track Rollers, Sprocket, Excavator Buckets, Blades, Excavator Cylinders, Swing Circles, and various electrical and hydraulic components to ensure that our customers' stringent requirements for quality and performance are met.