
Genuine Maytronics part · Tracks & Wheels
Dolphin Blue Tracks (2 Pack)
Part number 99831521-R2 · UPC 810071221651 · 1 year part warranty
Genuine Maytronics blue replacement tracks in a two-pack for Dolphin S100, Dolphin S50, Dolphin S200, and other confirmed models.
$54.99 MSRP
Not stocked by Poolbots. Sold on Amazon as a genuine Maytronics part.
Ships from Amazon.com. As an Amazon Associate, Poolbots earns from qualifying purchases.
About this part
What it does and when to replace it.
These genuine Maytronics blue tracks help your Dolphin robot grip the pool surface and move while cleaning. The listed part warranty is one year.
Match your robot to the confirmed fit list: Dolphin S100, Dolphin S50, Dolphin S200, Dolphin S300, and Dolphin S400. Part 99831521-R2 includes two tracks to replace the robot's existing tracks. Poolbots does not currently stock this part. Contact Poolbots' pool experts by live chat or phone for help confirming your model and identifying the right part.
- Match both part number 99831521-R2 and your exact robot model before buying.
- A similar model name does not confirm fit. Ask Poolbots' pool experts about spec-sheet names outside the confirmed list.
- Rinse debris from the tracks after use and check them for visible wear.
Compatibility
Fits these Dolphin robots.
Confirmed by Maytronics' compatibility checker and each robot's own spare-parts list.
Also listed by Maytronics for: Dolphin S100, Dolphin S50, Dolphin S200, Dolphin S300, Dolphin S400, S50, S100, S200, S300i, Dolphin S300i, S300i BIO, S400.
Do it yourself
How to replace it at home.
Switch off and unplug the power supply.
Remove the robot from the pool and place it on a stable surface.
Follow your model's track-replacement instructions to release and remove the old tracks.
Install both replacement tracks using the instructions for your exact model.
Check that both tracks are seated correctly. Return the robot to the pool before testing.
Step-by-step answers for this kind of part
How do I replace the tracks on my Dolphin robot?Video20 min
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.
Specifications
Size & Dimension
- Package Dimensions
- 17.0x2.4x9.9 inch
General Info
- Warranty (years)
- 1
- UPC
- 810071221651
Questions
Dolphin Blue Tracks (2 Pack), answered.
Which robots are confirmed to fit part 99831521-R2?
The confirmed models are Dolphin S100, Dolphin S50, Dolphin S200, Dolphin S300, and Dolphin S400. Ask Poolbots' pool experts to verify fit for any other model name shown on the spec sheet.
Does this package include one track or two?
Part 99831521-R2 contains two blue replacement tracks.
Is this part currently stocked by Poolbots?
Poolbots does not currently stock this part in its own store. This page helps you identify it. Contact Poolbots' pool experts by live chat or phone for help.
















