Support answer · Care & Maintenance
How do I replace the tracks on my Dolphin robot?
Short answer: Follow your Dolphin model's video and instructions, since some track replacements also require removing the brushes and side panels.
Based on Maytronics support, updated 2026-07-19, rewritten by Poolbots' pool experts. Parts that fix it are below.
The answer
What to know.
Find your model below for its track replacement video and written instructions. The steps vary by model.
M400/M500/Aquarius XL

Replacement track part number: 9985006-R2.
- Disconnect the power supply from the electrical outlet.
- Lower the handle, then turn the robot onto its back.
- Use a screwdriver to release the back brush from its sockets.
- Carefully lift out the brush, leaving the tracks in place.
- Pull the front brush out of its sockets by hand.
- Remove all four screws from one side panel, then take off the panel.
- Take off the rubber track.
- Remove all four screws from the opposite side panel, then take off that panel.
- Take off the rubber track on that side.
- Fit the replacement track and reinstall the side panel with its four screws. Repeat on the opposite side.
- Put both brushes back into their designated sockets.
- Return the robot to its upright position and straighten the handle.
S50 (S50, E10, E20, Active 10, Cayman, Escape, Encore)

Track part number for S50: 99831521-R2.
Track part number for E10/E20/Active 10/Cayman/Escape/Encore: 9983152-R2.
Before starting, disconnect the power supply from the electrical outlet.
- Place the robot upside down.
- Take the existing tracks off the robot.
- Fit a replacement track on each side.
- Turn the brush to check that the tracks are fitted correctly.
S100 (Advantage, Proteus DX3, Saturn, Echo, Nautilus CC, Active 15, Cayman, Escape, Explorer E20)

S100 track part number: 99831521-R2.
Gray track part number: 9983152-R2.
- Disconnect the power supply from the electrical outlet.
- Place the robot upside down.
- Take the existing tracks off the robot.
- Fit a replacement track on each side.
- Turn the brush to check that the tracks are fitted correctly.
S200 (E30, Advantage Ultra, Active 20, Quantum, T35, Triton PS)

S200 track part number: 99831521-R2.
Gray track part number: 9983152-R2.
- Disconnect the power supply from the electrical outlet.
- Place the robot upside down.
- Take the existing tracks off the robot.
- Fit a replacement track on each side.
- Turn the brush to check that the tracks are fitted correctly.
S300/S400 (Proteus DX5i, Active 30, T35/T45, Premium 40, Explorer E30, Active 30i, T55i, E50, Active 50, Explorer E50)

S300 track part number: 99831521-R2.
Gray track part number: 9983152-R2.
- Disconnect the power supply from the electrical outlet.
- Place the robot upside down.
- Take the existing tracks off the robot.
- Fit a replacement track on each side.
- Turn the brush to check that the tracks are fitted correctly.
M550/M600/M700 (Active 60, E60i, Explorer E70)

Replacement track part number: 9983152-R2.
- Disconnect the power supply from the electrical outlet.
- Place the robot upside down.
- Take the existing tracks off the robot.
- Fit a replacement track on each side.
- Turn the brush to check that the tracks are fitted correctly.
Liberty 200/300/400

Replacement track part number: 9983152-R2.
- Disconnect the power supply from the electrical outlet.
- Place the robot upside down.
- Take the existing tracks off the robot.
- Fit a replacement track on each side.
- Turn the brush to check that the tracks are fitted correctly.
Liberty 600
Follow this model's video for the replacement procedure.

Replacement track part number: 9983152-R2.
Nautilus CC Plus
Follow this model's video for the replacement procedure.

Replacement track part number: 9983152-R2.
Premier
Follow this model's video for the replacement procedure.

Replacement track part number: 9985006-R2.
Sigma/Nautilus CC Supreme
Follow this model's video for the replacement procedure.

Replacement track part number: 9985006-R2.
Finding replacement tracks
Poolbots sells replacement parts. For help choosing tracks for your model or following the replacement steps, contact Poolbots' pool experts by live chat or phone.
Source: Maytronics support. Same steps and facts, rewritten for clarity; the videos and illustrations are Maytronics' own.
Replacement parts
Parts that fix this.
This answer comes down to tracks & wheels. The exact part depends on the model: choose your robot and we open its parts list, or browse the category for every model.
Browse by category:Tracks & Wheels All genuine Dolphin parts →
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