Zodiac Vortex 3 Saphir castor bumper black - W1977A

Zodiac Vortex 3 Saphir castor bumper black

This is the genuine Zodiac castor bumper (bumper à roulette) for the Vortex 3 Saphir robotic pool cleaner. It is a compact roller-equipped buffer mounted on the lower sides of the robot body, designed to absorb impact and guide the cleaner smoothly away from pool walls and corners without stalling or jamming.

Function and role in the cleaner

The castor bumper combines a rigid plastic housing with a small rotating roller. As the robot navigates the pool floor and walls, the roller makes low-friction contact with surfaces and obstacles, allowing the unit to deflect and continue its cleaning cycle without loss of traction or directional control. Without a functioning bumper, the robot can become trapped in corners or sustain repeated impact damage to its chassis.

Compatible models

This part fits the Zodiac Vortex 3 and Vortex 4 series of robotic pool cleaners, including the Vortex 3 Saphir (W9300). It is listed as part number 29 on the Vortex 3/4 exploded-parts diagram, making identification and fitment straightforward.

Symptoms that indicate replacement is needed

Replace this bumper when the roller no longer spins freely, when the plastic housing is cracked or deformed, or when the robot repeatedly gets stuck in pool corners or along walls during a cleaning cycle. Visible flat spots, missing rollers, or an audible grinding noise during navigation are further signs of a worn castor bumper.

Why genuine Zodiac parts matter

Genuine Zodiac replacement parts are manufactured to the exact tolerances of the original assembly. Using genuine parts helps ensure the ongoing quality and reliability of the cleaner, preserving correct wall-deflection geometry and preventing premature wear on adjacent chassis components. Aftermarket alternatives can deviate in roller hardness or housing dimensions, leading to erratic navigation or accelerated wear.