The part coded 208-26-31190 (or 2082631190) serves as the pinion gear shaft that ensures power transmission in the swing machinery system of Komatsu PC400-3 excavators. For the heavy equipment swing mechanism to operate efficiently and stably, the gear profiles and shaft structure must be in exact alignment.
Points to Check During Swing Gear and Shaft Replacement
- Wear and burr conditions at the gear tips must be inspected.
- Bearing tolerances of the spline teeth on the shaft should be checked.
- Tooth contact patterns with the corresponding swing bull gears should be reviewed.
You can confirm the serial and model compatibility of your machine by comparing your currently removed swing machinery pinion gear shaft with the part number 208-26-31190 and reference codes in the 2082631190 format.
