Genuine Maytronics part · Brushes & Climbing Rings
Maytronics Grey Brush Assembly, DYN-C.B
Part number 99955340-ASSY · UPC 810071221736 · 1 year part warranty
Genuine Maytronics grey replacement brush assembly for Dolphin Sigma, Dolphin M400 and Dolphin Wave 60.
$69.99 MSRP
Out of stock
About this part
What it does and when to replace it.
This genuine Maytronics grey replacement brush assembly helps scrub pool surfaces as the robot moves. Part 99955340-ASSY is a combine brush, not an active brush.
Confirmed fits include Dolphin Sigma, Dolphin M400, Dolphin Wave 60, Dolphin Oasis Z5i, Dolphin Wave 80, Dolphin Nautilus CC Supreme and Dolphin Explorer E40. Poolbots does not currently stock this part in its store. Before buying, confirm your robot model and part number with Poolbots' pool experts by live chat or phone.
- Have your robot's model name and part number 99955340-ASSY ready when contacting Poolbots' pool experts.
Compatibility
Fits these Dolphin robots.
Confirmed by Maytronics' compatibility checker and each robot's own spare-parts list.
Also listed by Maytronics for: Dolphin Sigma, Dolphin M400, Dolphin Wave 60, Dolphin Wave 80, Dolphin Nautilus CC Supreme, Dolphin Active X4, Dolphin KAPTUR 400, PS50, Dolphin Dolphin 4, Dolphin Zenit 20, Dolphin Evolution 50, F50, Dolphin Maxi Kart, Dolphin SF50, Dolphin DIVER PRO 400, Dolphin Blue Maxi 65, Dolphin DIVER PRO 500, Dolphin Evolution 60, F60, Dolphin F60, PS60, SF60, Dolphin SF60, Dolphin Swell MX, Dolphin C5 PRO, Dolphin Pro X1, Dolphin Active X5, Dolphin KAPTUR 500, Dolphin X90, Dolphin Zenit 30, M500, Dolphin M500, Wave 30, Dolphin Wave 30, M400.
Do it yourself
How to replace it at home.
Switch off and unplug the power supply.
Remove the robot from the pool, let it drain and place it on a stable surface.
Follow your robot's brush replacement instructions to remove the worn assembly.
Install 99955340-ASSY in the correct position using your robot's instructions.
Check that the replacement assembly is secure before returning the robot to the pool.
Step-by-step answers for this kind of part
How do I replace the climbing rings on my Dolphin brushes?Video20 min
These steps apply to all Dolphin models equipped with climbing rings.
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Step 1: Soak the existing climbing rings Soak the rings in the pool, or leave them in water for 10 minutes. Make sure they are completely soaked before continuing.
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Step 2: Turn the robot over Take the robot out of the pool and place it upside down.
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Step 3: Check that the power is unplugged Confirm that the power supply is disconnected from the outlet before working on the brushes.
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Step 4: Release the brush With a flathead screwdriver, release both sides of the brush from their sockets.
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Step 5: Take out the brush Remove the released brush from the robot.
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Step 6: Remove the old rings Take the existing climbing rings off the brush.
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Step 7: Fit the replacement rings Let the new climbing rings soak in water until they are flexible. Work them onto the brush.
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Step 8: Reinstall the brush With the new rings in position, slide the brush into its sockets. Press it into place.
Brush removal and installation videos
These videos show how to remove and reinstall the brushes. Use them as a reference for steps 2-5 and 8.
M Line (DX3/Sigma/Nautilus CC Plus/Nautilus CC Supreme/M400)
M600 (Active 60, Explorer E70)
For help finding replacement climbing rings, contact Poolbots' pool experts by live chat or phone.
How do I replace the brushes on my Dolphin robot?Video30 min
Disconnect the power supply from the electrical outlet before starting. Find the front, middle, or rear brush section below, then follow the video and instructions for your model.
For help choosing a replacement brush, contact Poolbots' pool experts by live chat or phone.
Front brush
S50 (E10, E20/E25, Active 10, Cayman, Escape, Encore)
Replacement front brush: 9995544-ASSY.
- Disconnect the power supply from the electrical outlet.
- Turn the robot over so its underside faces up.
- Take the tracks off the robot.
- Use a flathead screwdriver to remove the wheel disk.
- Turn the wheel until you can see the drive gear's retaining screw through it.
- Loosen and remove the screw, then take out the white drive gear.
- Ease the old brush out gently.
- Slide the replacement brush into position. Put the drive gear back and secure it with its screw.
- Put the wheel cover and tracks back on.
- Turn the brush by hand to check that it moves smoothly.
S100 (Advantage, Proteus DX3, Saturn, Echo, Nautilus CC, Active 15, Cayman, Escape, Explorer E20)
- Disconnect the power supply from the electrical outlet.
- Turn the robot over so its underside faces up.
- Take the tracks off the robot.
- Use a flathead screwdriver to remove the wheel disk.
- Turn the wheel until you can see the drive gear's retaining screw through it.
- Loosen and remove the screw, then take out the white drive gear.
- Ease the old brush out gently.
- Slide the replacement brush into position. Put the drive gear back and secure it with its screw.
- Put the wheel cover and tracks back on.
- Turn the brush by hand to check that it moves smoothly.
S200 (E30, Advantage Ultra, Active 20, Quantum, T35, Triton PS)
- Disconnect the power supply from the electrical outlet.
- Take the tracks off the robot.
- Use a Phillips screwdriver to remove the four screws securing the brush.
- Lift out the old brush.
- Fit the replacement brush and secure it with the four screws.
- Turn the brush by hand to check for smooth movement.
S300 & S400
S300 (E35/E35i, Proteus DX5i, Active 30, T35/T45, Premium 40, Explorer E30, E40i, Active 30i, T55i)
S400 (E50i, Active 50, Explorer E50)
- Disconnect the power supply from the electrical outlet.
- Take the tracks off the robot.
- Use a Phillips screwdriver to remove the four screws securing the brush.
- Lift out the old brush.
- Fit the replacement brush and secure it with the four screws.
- Turn the brush by hand to check for smooth movement.
M400/M500 (Sigma, Oasis, Nautilus CC Supreme, Aquarius XL, C4)
- Gently push the brush out with a flathead screwdriver until it releases.
- Position the replacement brush where the old one sat.
- Press the brush inward until it is seated.
- Turn the wheels to check that the brush moves properly.
M250 (Nautilus CC Plus, Dx3, Zenit 20)
Follow the video for the front-brush replacement procedure.
Premier
Follow the video for the front-brush replacement procedure.
Middle brush
M400/M500
- Disconnect the power supply from the electrical outlet.
- Turn the robot over so its underside faces up.
- Remove the four screws securing the brush, one at each corner.
- Lift the brush out of the robot.
- Fit the replacement brush in the same position as the old one.
- Reinstall all four screws and tighten them.
Sigma
Replacement middle brush: 9995541-R1.
This middle-brush procedure applies to Sigma produced in 2026 or later.
- Disconnect the power supply from the electrical outlet.
- Turn the robot over so its underside faces up.
- Remove the four screws securing the brush, one at each corner.
- Lift the brush out of the robot.
- Fit the replacement brush in the same position as the old one.
- Reinstall all four screws and tighten them.
Rear brush
S200 (E30, Advantage Ultra, Active 20, Quantum, T35, Triton PS)
Replacement rear brush: 99955380-ASSY.
- Disconnect the power supply from the electrical outlet.
- Turn the robot over so its underside faces up.
- Take the tracks off the robot.
- Carefully free the brush from the notches on both sides, then remove it.
- Fit the replacement brush where the old one sat.
- Put the tracks back on both sides.
- Turn the brush by hand to check for smooth movement.
S300 & S400
S300 (E35/E35i, Proteus DX5i, Active 30, T35/T45, Premium 40, Explorer E30, E40i, Active 30i, T55i)
S400 (E50i, Active 50, Explorer E50)
Replacement rear brush: 99955380-ASSY.
- Disconnect the power supply from the electrical outlet.
- Turn the robot over so its underside faces up.
- Take the tracks off the robot.
- Carefully free the brush from the notches on both sides, then remove it.
- Fit the replacement brush where the old one sat.
- Put the tracks back on both sides.
- Turn the brush by hand to check for smooth movement.
M400/M500 (Sigma, Oasis, Nautilus CC Supreme, Aquarius XL, C4)
Replacement brush assembly: 99955340-ASSY.
- Gently push the brush out with a flathead screwdriver until it releases.
- Position the replacement brush where the old one sat.
- Press the brush inward until it is seated.
- Turn the wheels to check that the brush moves properly.
M600/M700 (Active 60, E60i, Explorer E70)
Replacement rear brush: 99955340-ASSY.
- Disconnect the power supply from the electrical outlet.
- Turn the robot over so its underside faces up.
- Take the tracks off the robot.
- Carefully free the brush from the notches on both sides, then remove it.
- Fit the replacement brush where the old one sat.
- Put the tracks back on both sides.
- Turn the brush by hand to check for smooth movement.
M250 (Nautilus CC Plus, Dx3)
Follow the video for the rear-brush replacement procedure.
M550
Follow the video for the rear-brush replacement procedure.
Specifications
Product Info
- Active Brush
- No
- Brush Type
- Combine Brush
General Info
- Warranty (years)
- 1
- UPC
- 810071221736
Questions
Maytronics Grey Brush Assembly, DYN-C.B, answered.
Which Dolphin robots fit this brush assembly?
Confirmed compatible models are Dolphin Sigma, Dolphin M400, Dolphin Wave 60, Dolphin Oasis Z5i, Dolphin Wave 80, Dolphin Nautilus CC Supreme and Dolphin Explorer E40.
Does Poolbots currently stock this part?
Poolbots does not currently stock 99955340-ASSY in its store. Contact Poolbots' pool experts by live chat or phone for help identifying the part and checking fit.
What warranty is listed for this part?
The listed part warranty is 1 year.
Brushes & Climbing Rings
