A: If the upper cabin chassis shakes or drifts slightly after the operator releases the control levers, the gears are worn.
A: Technicians must check the pinion spline alignment, clean old grease from the lower cavity, and apply high-pressure open-gear lubricant.
A: Cross-reference the stamped part number 169-5549. This reduction assembly fits Caterpillar 320B and 320C track frames perfectly.
A: Designed with deep internal oil channels, the gearbox promotes constant oil circulation to keep bearings cool and prevent lubricant thinning.






















