Aladdin 6203-625 pool pump motor bearing with a 15.9 mm, 5/8 inch boreAladdin Bearing #203-625, 15.9 mm (5/8"), 6203-625 In stock$1099
Aladdin 6203-625 pool pump motor bearing with a 15.9 mm, 5/8 inch bore
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Aladdin Bearing #203-625, 15.9 mm (5/8"), 6203-625

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$1099
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Quick overview

  • 5/8 inch bore The 15.9 mm, 5/8 inch shaft size of the 6203 series bearing.
  • 6203 series The common pool pump motor bearing family.
  • Also listed as 6203-LL Aladdin lists it as 6203 motor bearing RBL, 6203-LL.
  • Motor rebuild part The bearing changed when a motor starts to whine, growl or run hot.
  • Aladdin part Sourced as a replacement bearing for pool pump motors.
  • Change them in pairs A motor carries a bearing at each end, and replacing only the noisy one usually means going back in.
Full description and specifications ↓

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Product details

The Aladdin 6203-625 is a pool pump motor bearing with a 15.9 mm, 5/8 inch bore. It is also listed as 6203 motor bearing RBL, 6203-LL.

When you need one

Bearings are what a motor rides on, and they are usually the reason a pump that once hummed now growls, whines or squeals. Caught early, a bearing change is a cheap repair. Left running, a failed bearing takes the shaft and the windings with it and the whole motor gets replaced instead.

Getting the right one

Bore size is what matters first: this one is 15.9 mm, 5/8 inch, in the 6203 series. Note that the product name shortens the number to #203-625 while the part number itself is 6203-625. There is a bearing at each end of a motor, and since both have done the same hours it is worth doing the pair while the motor is apart.

From Pool School

Replace the Pool Pump Motor or the Whole Pump?The manufacturers' tests first, what each repair replaces, and the federal motor rule. Read How to Prime a Pool PumpFrom the breaker to a full pot, each manufacturer's time limit, and what to check when it won't catch prime. Read
Specifications
Brand Aladdin
Manufacturer part number 6203-625
Type Pool pump motor bearing
Bore 15.9 mm (5/8")
Series 6203
Also listed as 6203 Motor Bearing RBL, 6203-LL
Shipping weight 0.14 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

What size is the bore?
15.9 mm, which is 5/8 inch. That is the shaft size the bearing rides on.
Is this the same as a 6203-LL?
Aladdin lists this part as 6203 motor bearing RBL, 6203-LL. Note that the product name shortens the number to #203-625 while the part number is 6203-625, so go by 6203-625 when matching.
How do I know a bearing has failed?
A motor that has gone from a hum to a growl, a whine or a grinding noise, or one that is running noticeably hotter, is usually telling you the bearings are done.
Should I replace both bearings?
It is the sensible approach. There is a bearing at each end of the motor and they have run the same hours, so doing one and leaving the other often means stripping the motor twice.
Ask your own question