Drive gear OKI 3PB4055-2440P1

The Drive gear OKI 3PB4055-2440P1 is a replacement mechanical component designed for dot matrix printers compatible with OKI ML320 and ML390 series. Manufactured from a durable white polymer, the gear restores mechanical drive function in the paper feed and print head assembly, helping to maintain consistent print timing and reduce misfeeds. This spare part is intended for service and repair tasks where the original drive gear shows wear, cracking, or loss of teeth.

Advantages

The replacement drive gear offers reliable durability and consistent dimensional accuracy to match original equipment tolerances. Its white polymer construction resists typical wear and provides smooth engagement with mating gears and shafts. Using a correctly fitted drive gear reduces vibration and print alignment errors, supporting stable dot matrix printing performance over extended service intervals.

Key specifications

• Compatibility: dot matrix printer drive assemblies for specified OKI ML320 and ML390 models
• Material: durable white polymer suitable for mechanical gear use
• Function: drive gear for paper feed/print head timing
• Form: spur gear geometry matching original equipment mating profiles
• Intended use: replacement part for worn or damaged gears

How to use

Power off and disconnect the printer before beginning any service work. Access the drive assembly by removing the printer cover panels according to the manufacturer's service instructions for the ML320/ML390 series. Carefully note or photograph the original gear orientation and shaft relationships before removal. Remove the worn gear from its shaft, inspect adjacent components (bushings, shafts, mating gears) for wear, and clean the area of debris. Install the replacement drive gear in the same orientation, ensuring proper engagement with neighboring gears and secure fit on the shaft. Reassemble the cover panels and perform a test print to confirm correct feed and timing functions.

Recommendations

Replace the drive gear as part of routine mechanical maintenance when signs of wear are present. Use compatible tools and follow safety precautions from the printer service manual. If other mechanical components show wear or deformation, replace them together to ensure long-term reliability and to prevent accelerated wear of the new gear.