OEM replacement part 3884997-R6. Guide wheels 4 pack with 2 drive gears for Dolphin/Nautilus CC Plus cleaners. - What it is: Genuine Maytronics replacement part designed for Dolphin Nautilus CC Plus models. Includes 4 guide wheels and 2 drive pulleys/gears. - What it does: Replaces worn or failed drive gears and pulleys to restore wall climbing and overall cleaning performance. After replacement, the robot can climb walls effectively again and maintain optimal debris removal. - Compatibility: Compatible with Maytronics Dolphin products, including Nautilus CC Plus. Fits M200, M400, M500 and Dx3, Dx4, Dx6 Premier pool cleaner accessories. - Easy to install: Open the unit, replace the 4 pulleys and 2 drive gears, then reassemble. Ensure all parts are properly aligned for a perfect fit. - When to use: - Cleaner climbs slowly or stalls on walls due to worn gears or pulleys. - Preparing for peak cleaning season to ensure reliable wall climbing and brushing. - After extended use to refresh drivetrain and restore performance. - Benefits: Restores climbing efficiency, extends cleaner life, preserves cleaning performance without replacing the entire unit. Genuine OEM part ensures proper fit and compatibility.