Komatsu PC200-7 Swing Second Stage Planetary Carrier Assembly

This component serves as the second stage planetary carrier within the swing motor reduction gearbox assembly. Manufactured from cast steel to withstand high shear loads and cyclic fatigue inherent in excavator slewing operations. The carrier integrates four planet gear positions (four star configuration) ensuring balanced torque distribution to the ring gear. It interfaces directly with the first stage sun gear output and the second stage planet gears, maintaining critical concentricity and gear mesh parameters. This assembly is a non-serviceable structural sub-component of the swing drive unit; replacement requires disassembly of the swing motor gearbox housing and verification of gear backlash and bearing preload upon reassembly. Compatible with Komatsu PC200-7, PC210-7, PC220-7, PC230-7, and PC290-7 model excavators equipped with the standard swing drive configuration.