Part # UST1252
Warranty 1 Year
Dimensions 16" L x 8.5" W x 6.5" D
Alternate Part #'s 12020, 164135, 177022, 184951, 5KCR39UN6181X, 90118597, B231, B231SE, C1149, EB231, JH25UP1, K48N2N106, K48N2N106A1, K48N2N106A3, K48N2N106A9, K48N2N106C2, K48N2N113A6, SP1620Z1M, SP1620Z1MBK, UST1252, V12020
Voltage 230, Max Amps 230V = 11.2, Single Speed, Round Flange, RPM = 3450, Threaded Shaft, Frame = 56J Used on the following models: Hayward Max Flow, Hayward Super Pump, Hayward Super II, Hayward Northstar and Jacuzzi Magnum pumps.
Note: NOT California Title 20 Compliant.
California Title 20 Compliant Options:
What is a recommended replacement motor for this Hayward pump. see attach jpg. Please include cost
RS 2000 2.00 Hp
Just in Case I consider what would be a good dropin pump as well? Please include cost.
The Century 2.5 HP Round Flange 56J Up Rate Motor - UST1252 and California Title 20 Compliant Options: Dual Speed (230V)- B2979 Variable Speed - ECM27CU are motor options. The Tune Up Kit Hayward Super II - GOKIT2 or GOKIT2SALT will be needed when replacing the motor on the Hayward RS Series pump. We do not offer the Super II / RS 2.5HP Pump. The Waterway Champion 2.0 HP Full Rate EE Pool Pump - CHAMPE-120 or Waterway Power Defender 270 PD-VSC270 (California Title-20 Complaint) are other pump options.
Will Thermal Overload Protector - 610806-095 work on AO Smith motor model K48N2EC15?
The correct replacement terminal board for your Century 2.0 HP Square Flange 48Y Full Rate Motor - SQ1202 motor is the 626536-002
I am inquiring about the part for this ao smith motor for the thermal Overload protector. Not the terminal board.
I am about to purchase (replace) the pool filter pump. It is HP 3.0 and total HP = 3.45. I am wondering if this is too big. I recall it was about 2.5 HP for the original. How is the HP determined?
hi, i have a in ground pool about 38000 gallons i am using a haywood pump 1 hp the water flow is horrible. I can not turn on all jets (7) 2 floor-3 on the wall-2 at the steps-not enough pressure to push things to the skimmers. I want to upgrade to a 2.5 hp thinking it would be better but i noticed the rpms are the same what are your thoughts.
John, Any single speed pump will have the same rpms (3450). If you want to increase the horse power, you need to make sure that your filter and plumbing can handle the increased flow.
Hi, again: Related to the question about the leakage below. The inserts appear to be fully seated, and the leakage appears come from mostly the very top center area - between two bolts. Any other possibilities? The pump itself is about 11 years old, but not sure what would have caused it to start leaking suddenly. Thank you; Ken
If the seals have been replaced and lubed then the only other possibilities will be those bolt inserts or the housing has been warped to the point that they do not seal flush with one another.
I have a UST 1252 motor connected to a Hayward Super II Pump. This motor is about 2 years old. It has begun to leak around the top of the seal between the motor and pump. I did replace the seal using your GO kit, but it made no difference. Cleaned the surfaces real well and the bolts are tight. It is a fair amount of leakage and definitely from top area, not the bottom. Suggestions/causes? Thanks: Ken
The Super 2 series has been known to get leaks at the bolts where the housing meets the motor. The bolt ports are known to separate from the housings. If that is the case then you can use the pump housing repair tap set part number 5110-22.
I am looking to replace a pool motor UST 1252. Found in on your webpage along with tune-up kit. I was having pump leak problems at the seam between pump and main housing. Thinking of replacing at same time. Do you have a complete kit or only parts ?
Hi Mike, we may have a kit but we would need to know the make and model of your pump. This should be something like Hayward Super Pump, Hayward Super II, Jacuzzi Magnum, etc.. Could you please email back with your pump details.
I have a 2 year-old UST1252 motor. I believe the start capacitor is failing - perhaps the run capacitor as well. The pump generally does not start (hums and then shuts down and/or breaker trips) the first time after sitting for a while. Flow seems good once it runs and the impeller seems to move freely (I have only reached in through strainer side, have not removed the pump (yet). All that said, can you tell me the size/ratings for the capacitors? Thanks! Ken
I'm trying to replace the motor on my pool pump but all these numbers and abbreviations on the motor label are really confusing me. What do they mean?
Replacing a pool pump motor is not as difficult as it seems. You can try looking here. If you need help figuring out what the information on your label means. If you are still having difficulty figuring it out you can call us at our toll free number or you can send us a photo of your motor label here.
I'm trying to find a replacement motor for my pool pump but my model number doesn't match what you have listed as the model number. My model number begins with a C48 and yours begins with an SP. Please help.
What we have listed on our chart pages is the pump model number. The model number you have will just identify the motor. If you look on the plastic housing on the pump there should be a sticker which will have the pump model number. You can usually find this by the discharge port on the pump. Once you locate it you can choose the correct replacement motor. Be certain to change the shaft seal and gaskets as needed. You can use our >How to guide if you need help.
Why should I purchase a Tune Up Kit?
A Tune Up Kit includes all of the essential replacement seals and gaskets for the pump. The seals and gaskets should be replaced when installing a new motor on your pump. New seals will prevent the pump from leaking water or losing the prime. A Tune Up Kit will protect your motor and ensure that the pump is working efficiently.
Why do I need to purchase a new shaft seal?
We strongly recommend replacing the shaft seal. The purpose of a shaft seal is to prevent water from running down the shaft of the motor and into the motor housing. Water will damage the bearings and cause the motor to fail. A new shaft seal should be installed whenever a motor is replaced. The motor manufacturer can deny the warranty if the motor fails to due to water damage from a faulty shaft seal. To find your shaft seal you will need to visit our Pool Pump Parts Page or the Spa Pump Parts Page and select your make and model.
What is Service Factor?
Service Factor(SF) is a multiplier that when multiplied by the horsepower of the motor indicates the total permissible horsepower loading that may be carried when the motor is operating at rated voltage and frequency. The most important thing to remember when replacing a motor is that the replacement motor's horsepower times its service factor must be equal to or greater than the original motor's horsepower times its service factor. The Service Factor rating can be found on the motor label. See Step 4 of our How to Read a Pool Motor Label guide.
Less than 1 hr
Screwdriver, Pliers, Socket Set, Adjustable Wrench
Remove 4 exterior Motor to pump bolts
Remove next 4 bolts on bezel
Loosen rear metal cover screws
Remove impeller by securing the driveshaft nut and turning the impeller
Remove next two covers attached to motor
Turn off breakers
Replace gaskets, seals and impeller spring
Reassemble in reverse with new motor
(5 out of 5 stars) Excellent Pump Moter Replacement
Reviewed By: PoJo from Clarence, NY ()
Pros: Awesome fit - excellent replacement
Tip to get the impeller off the old pump moter: use a 7/16" open ended wrench - it slides in near the capacitor on the electrical side... rotate the impeller until the wrench slides into place at the end of the shaft and then one person holds the motor and the wrench while a 2nd person loosens the impeller off with bare hands by turning the impeller counter clock-wise.
(5 out of 5 stars) Great motor at the Best Price
Reviewed By: peejmeister from Lucas, TX ()
Pros: Great price, quiet motor.
Although there was an initial glitch in getting this shipped, the Support team expedited it and got it out shortly thereafter. The motor installed easily (following the great how-tos on this site) and runs like a champ, and is extra quiet. I would recommend this motor for any application it fits. I've been very satisfied with its performance.
(4 out of 5 stars) Great swimming pool filter pump motor
Reviewed By: Janice T. from Franlkin Lakes, NJ ()
Pros: Reasonably quiet, long life.
Cons: Impeller removal is difficult and dangerous
The motor is great. I had to replace it for my filter pump only after 14 years of hard use. The motor could use an improvement where you have to hold the motor in place to remove the impeller. The back assembly needs to be removed and the starting conductor as well. I feel it could be easy to damage some of the parts in order to hold the motor in place while unscrewing the impeller. They could provide a small slot where a wrench can be inserted away from the conductor and wires.