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The MAYTRONICS 99955380-assy is a replacement wheel assembly for Dolphin robotic pool cleaners. The assembly consists of a PVC wheel, a thermoplastic elastomer bushing, and a retaining washer. The PVC wheel provides durable traction against pool surfaces, the bushing reduces rotational friction at the axle point, and the washer keeps the assembly seated during operation. This part is installed by pool service technicians and knowledgeable pool owners performing routine maintenance on Dolphin-series automatic pool cleaners.
This wheel assembly is intended for residential robotic pool cleaners that have developed reduced drive performance or uneven movement across pool surfaces. When a Dolphin unit begins to show sluggish travel, erratic tracking, or visible wear on the existing wheel, replacing the wheel assembly restores normal drive function. The part fits a range of Dolphin models and compatible private-label units, making it a common stock item for pool service professionals handling Dolphin cleaner repairs.
Compatible with the following Dolphin and private-label models: Dolphin Triton PS Plus, Dolphin Triton PS, Dolphin Active 30i, Dolphin Proteus DX5i, Dolphin Mercury, Dolphin Premium Energy, Dolphin Discovery M2BIG, Dolphin Discovery with Swivel, Dolphin T35, Dolphin T55i, Dolphin T45, Prowler 930 (Pentair), Dolphin Prowler 920 (Pentair).
Pool service technicians typically handle wheel assembly replacement, though the task is within reach of experienced pool owners. Before beginning, power down and unplug the cleaner completely and remove it from the water. Use hand tools to remove the existing wheel, bushing, and washer, then seat the new assembly in reverse order. Verify that the washer is fully engaged before returning the unit to service.
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