Dolphin gear is slipping

pecck1 · Sep 9, 2022

What can I do about my gear slipping? When it does the tracks stop moving because it can't get a solid connection to the smaller gear and just slips.
Thanks for any recommendations. I can't compare to new, so I can't tell what if anything is worn down.

mas985 · Sep 10, 2022

You need a hub and bearing replacement:

Maytronics Dolphin 9993219 Wheel Kit

Lowest Prices Guaranteed. THE Leading Experts of Maytronics Dolphin Replacement Parts and Robotic Pool Cleaners. Authorized Service Center and Elite Dealer. All Maytronics Parts Available. Call 303-985-0077 if you do not see the part you need or if you need assistance with pricing or...

marinapoolspaandpatio.com

and maybe a drive gear

Maytronics Dolphin 9983142 Gear Drive for Motor

Lowest Prices Guaranteed. THE Leading Experts of Maytronics Dolphin Replacement Parts and Robotic Pool Cleaners. Authorized Service Center and Elite Dealer. All Maytronics Parts Available. Call 303-985-0077 if you do not see the part you need or if you need assistance with pricing or...

marinapoolspaandpatio.com

Unfortunately, they are currently back ordered on Marina.

caffeinatedsoap · Dec 10, 2022

I made a drive gear STL as I was having the same issue. You'll want to shim out your drive wheel or it'll probably all go wrong again.

Dolphin S300i Drive Gear by wesbrowntech

This is a replacement drive gear for the Dolphin S300i. Make sure to shim out your drive wheel as odds are the bore of it has worn out as well. I have no idea how long this gear will last but its worth a shot as they're really hard to find!

www.thingiverse.com

JSquare · Dec 15, 2022

caffeinatedsoap said:
I made a drive gear STL as I was having the same issue. You'll want to shim out your drive wheel or it'll probably all go wrong again.

Dolphin S300i Drive Gear by wesbrowntech

This is a replacement drive gear for the Dolphin S300i. Make sure to shim out your drive wheel as odds are the bore of it has worn out as well. I have no idea how long this gear will last but its worth a shot as they're really hard to find!

www.thingiverse.com

Thanks! What is the best way to shim the wheels as you mentioned? I have a Pentair Dolphin Warrior SE. 2.5 years old. Goes through the check, runs like normal backwards, struggles to move forward. Guessing it is worn rear wheels, bushings and the drive gear looks a bit worn.

Rrebel · Dec 29, 2022

caffeinatedsoap said:
I made a drive gear STL as I was having the same issue. You'll want to shim out your drive wheel or it'll probably all go wrong again.

Dolphin S300i Drive Gear by wesbrowntech

This is a replacement drive gear for the Dolphin S300i. Make sure to shim out your drive wheel as odds are the bore of it has worn out as well. I have no idea how long this gear will last but its worth a shot as they're really hard to find!

www.thingiverse.com

This is awesome! iam printing this tomorrow! any change you have the frontwheels and the brush gear also? living on a remote island this is great!

caffeinatedsoap · Jun 22, 2023

JSquare said:
Thanks! What is the best way to shim the wheels as you mentioned? I have a Pentair Dolphin Warrior SE. 2.5 years old. Goes through the check, runs like normal backwards, struggles to move forward. Guessing it is worn rear wheels, bushings and the drive gear looks a bit worn.

You'll have to model a ring for how much wear you have. It should be an easy thing to do as compared to the gear which was a pain.

Rrebel said:
This is awesome! iam printing this tomorrow! any change you have the frontwheels and the brush gear also? living on a remote island this is great!

Just the gear since I couldn't find any to buy at the time.

Just a follow up, the new gear fixed my issue for a bit but now it would appear as though the entire chassis is deflecting/warping causing the drive unit to pull towards the center of the large wheel and causing the new gear not to mesh and slip. Made it 6 months though

As far as I can tell there isn't any way to fix this besides a new case?

mas985 · Jun 23, 2023

You need to replace the wheel hub as well and probably the brush assembly. They both have slip bearings that wear.

caffeinatedsoap · Jun 23, 2023

mas985 said:
You need to replace the wheel hub as well and probably the brush assembly. They both have slip bearings that wear.

Yeah I did that it, I'm writing up a post on my findings right now.

donrua · Apr 14, 2024

I have no idea what these mean, or how you do them:

- drive gear STL (what does the stl stand for?)
- what does "shim the wheel" mean, or how do you do that?
- You'll have to model a ring for how much wear you have.

Seems like the Dolphin products are built to break, and for the money they cost, seems like that's not a great investment. I've been on three threads where the slipping gear issue seems to not have a solid solution, even a replacement gear for motor and wheel seemed to fit a bit loose.

Louis2024 · Apr 17, 2024

Sure thing!

I gotta say, does anyone else here feel like Dolphin's design is just totally hard to wrap your head around?

mas985 · Apr 17, 2024

Those are plastic hydraulic bearings so they are designed to wear like that and eventually have to be replaced. No different than the brakes or tires on your car.

STL - File format for cad drawings

STL (file format) - Wikipedia

en.wikipedia.org

This is so you can 3-D print them.

But it is not all that expensive to just replace the parts as I post in #2: