48Y Motor Spacer...How to use??

[JSnake Repair]

I have a Pentair Challenger HP setup that I am replacing the motor on. My previous model was an Emerson 1081 Pool Motor 'K63CXESF-4793' (56Y), and my new one is a Century USQ1202 "1081" (48Y). I am aware I am taking a drop in true HP.

I have this rubber spacer block with adhesive on one side, but there is no documentation ANYWHERE on how to install it. Common sense suggests I should cut 3 small squares off and apply to locations in the photo...but then why did they not provide 3 pre-cut squares?

Please help...

 

[Texas Splash]

If you're still working in this, I'm going to ask @JamesW for some help.

 

[JamesW]

The spacer goes underneath the motor in the back if there is a gap.

 

[mknauss]

I am aware I am taking a drop in true HP.

You must change your impeller to match.

 

[JamesW]

10 C35- 11 Motor Pad

Pentair Motor Pad C35-11 - INYOPools.com

C35-11 - PAD, MOTOR (C35-11)

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Pentair Support, Motor (355385) - INYOPools.com

355385 - SUPPORT, MOTOR (355385)

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11B 355385 Adapter, 5-5/8 in. dia. motor



What is the difference between 48Y & 56Y?

Both have the same exact size square flange.

The 56Y motor body diameter is 1″ larger than 48Y, so the 48Y usually includes a 1/2″ rubber spacer if required when mounting.

Body diameter is the only difference, they can be inter-changed.

48Y frame is 5 5/8" in diameter, has same flange as 56Y, just smaller diameter motor

 

[JamesW]

The 48 frame is a 1/2" smaller radius, so the rubber spacer goes under the back of the motor to support the motor when changing from a 56 motor to a 48 motor.

 

[JamesW]

The only difference between the 56Y and 48Y is the circumference (width) of the motor.

They will both mount to the seal plate but the 48Y will need an optional spacer (that comes with the motor) to sit on to make up for the difference in size.

How To Choose The Right Replacement Pool Pump Motor - INYOPools.com

how to find the correct pool pump motor

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What Does My Pump Motor's Frame (FR) Rating Mean? - INYOPools.com - DIY Resources

Your pool pump motor frame (FR) rating notes three key parts of your motor’s design which will help you match your current motor to a replacement.

www.inyopools.com

56Y frame is 6 3/4" in diameter, has same flange as 48Y

 

[JamesW]

Pentair Support, Motor (355385) - INYOPools.com

355385 - SUPPORT, MOTOR (355385)

www.inyopools.com

Pentair Challenger Pump Parts - INYOPools.com

Pentair Challenger Pump - INYOpools.com has the largest selection of swimming pool and spa replacement parts with over 70,000 parts in stock. Order today and save!

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[JSnake Repair]

You must change your impeller to match.

In the previous setup, the Emerson motor had a True Horsepower rating of 2.6 (2HP x 1.3SF). My new Century Pump has a True Horsepower rating of 2.2 on the label.

Previously used parts were as shown in the image, this is what I have purchased to replace them (as the impeller and spacer are quite worn; diffuser did not really need replacement). It appears reviewing page 12 of the manual, that I have the equivalent of a 355027S (a 2HP motor)...and that they were using the WRONG parts prior (for a 1.5HP motor, not surprising). If they had been using the correct parts, I would actually not have need to change my impeller (or diffuser)...but now I do.