Maytronics Dolphin Supreme M5 active brush assembly dynamic - 9995541-ASSY

Maytronics Dolphin Supreme M5 active brush assembly dynamic

This is the complete dynamic active brush assembly for the Dolphin Supreme M5 and its platform siblings. Unlike a passive roller, the active brush is motor-driven: it spins independently of the robot’s tracks, pressing bristles firmly against the pool surface to dislodge compacted algae, fine sediment, and biofilm that waterflow alone cannot remove.

What this active brush assembly does in the Dolphin

The assembly mounts at the front of the chassis and receives drive from the brush motor via an internal gear train. As the robot travels, the brush counter-rotates against the direction of travel, maximising scrubbing force on the pool floor, walls, and waterline. When the assembly fails — seized bearings, stripped gear teeth, or a split brush sleeve — the robot still moves but leaves behind streaks and unscoured patches, which is the clearest field diagnostic for this part.

Which Dolphin models it fits

The 9995541-ASSY is confirmed for the Dolphin Supreme M5, Supreme M400, Supreme M500, C3, C4, and Wave 90. Maytronics’ own global parts catalogue additionally lists it across a wide range of European-market models including the M400, M500, KAPTUR 400, KAPTUR 500, DIVER PRO 400, DIVER PRO 500, Evolution 50/60, Maximus X70/X90, Active X4/X5, and Zenit 10/20/30 series. Cross-reference your robot’s model label against this list before ordering — the platform is broad but not universal.

Signs it needs replacing

Replace this assembly when you see visible brush bristle wear down to the core sleeve, hear a grinding or clicking noise from the front brush bay during operation, or notice the brush spindle has no rotation when the robot is running in hand. A brush that rotates freely when the robot is off but stalls under load points to worn internal bearings or a sheared drive gear within the assembly — neither is serviceable individually, so the complete assembly is the correct fix.

How to install it

Power down and remove the robot from the water. Open the top access panel and lift out the filter cartridge to expose the brush bay. The assembly unclips from the chassis with two lateral locking tabs; no tools are required for removal on most M-series bodies, though some variants use a single Phillips screw on each end cap. Seat the new assembly until both tabs click, confirm the brush spins freely by hand, then refit the filter and close the panel. Total installation time is under ten minutes for anyone familiar with the robot’s interior.