GOVERNOR - The governor controls the opening and closing of the start switch. When the motor is off, springs on the arm of the governor cause the arm to come in contact with the bottom of the start switch causing the two contact points on the switch to come together and close the start winding circuit. When the motor is turned on, the rotational force of the shaft causes the weights on the ends of the governor to spin out. When that rotational force is greater than the force of the springs, the arm on the governor drops down and the contacts on the switch separate and disconnect the start capacitor circuit. With age, the governor will sometimes stick open so that when the motor shuts off, the start circuit will remain open and the motor will not restart. For instructions on replacing the Governor see our guide on "
How To Replace the Governor on an AO Smith Motor".
FRANCISCO Posted: 5/23/2019
WHERE CAN I BUY A START "V" SWITCH ???Reply
InyoPools Product Specialist Robert M. Posted: 5/23/2019
Hello Francisco - What is the catalog or part number of your motor?Reply
Anonymous Posted: 5/3/2019
I need to replace a Jacuzzi tub A.O.Smith motor. S# = S8B83A15 SER= 2C97 Type = S RPM = 3450 SF =115 PH = 1 A=10.6 SFA HZ= 60 AMB= 40C FR= 56Z Code= L INS= B* TIME = SPL. HSG + OPEN Thermally protected Type A..... Any cahnce you could help with a replacement?Reply
InyoPools Product Specialist Matt S. Posted: 5/3/2019
Is there a 4 between the S and the 8 of the model number?Reply
Michelle Posted: 5/2/2019
Hi I’m looking for a motor and pump my hot tub. It’s 1.5 hp part # 7-186022-03 type CXSM volts 115 amps 13.8/3.8 serial CB05-10 . Hope this info helps!Reply
InyoPools Product Specialist Robert M. Posted: 5/3/2019
Hello Michelle - The replacement motor would be part number BN50V1.Reply
Jay Posted: 3/16/2019
Does the AO Smith SP1510Z1XBC motor have replaceable brushes?Reply
InyoPools Product Specialist Matt S. Posted: 3/18/2019
Jay - there are no brushes listed as replaceable parts on this motor's schematic sheet.Reply
Marco Posted: 3/11/2019
Looking for A.O smith ac motor C48A01A19Reply
InyoPools Product Specialist Robert M. Posted: 3/12/2019
Hello Marco - Unfortunately, we do not carry that motor.Reply
Unsure Posted: 2/21/2019
I have an ao smith pump motor and not sure what the model number is. The frame says p56y. It’s a single phase 1 hp motor. Part says 0-193985-04 and serial is 24811ch type cx. Not sure what bearing to get to replace mine.Reply
InyoPools Product Specialist Robert M. Posted: 2/27/2019
Hello Unsure - Your part number, 0-193985-04, cross-references to model B2853. That motor would require two 6203 bearings.Reply
Mike Posted: 2/1/2019
I'm looking for the shaft end for an AO Smith motor. The motor number is K48M2P105B3. 5Reply
InyoPools Product Specialist Matt S. Posted: 2/1/2019
Hello Mike - do you need the shaft end bearing, the shaft, or the shaft end cap?The parts page for your motor should be shown on this page: Century / A.O Smith UST Series UST1202 and UST1252Reply
Bill Posted: 1/5/2019
I'm looking for a Century end bell #2505780 can you help?Reply
InyoPools Product Specialist Matt S. Posted: 1/10/2019
Hello Bill, I checked with a few warehouses for the part but it appears to be obsolete. After a few google searches, the only results I could find with that part number were for salvaged end bells from old motors.Reply
InyoPools Posted: 8/29/2018
Hello Lisa - The B723 motor was discontinued. The replacement for your Magnetek B723 is Century model B653.Reply
Lisa Posted: 8/28/2018
Hi, I have a Magnetek Century Centurion pool pump and I am looking for a replacement motor for it. Do you have this? Or can you tell me what else will work? Here is the info: CAT:B723, Part: 8-164717-04, HP 1.0, Type:CX, Volts:208-230/115, Amps:SF 6.4-5.9/11.8, RPM:3450, AMB: 50C, SF: 1.40, Time:CONT, Code: J, Encl:DP, FR:M56C, Form:KJM, Insul class: B, PH:1, Serial: B86-265, 1081 Pool pump duty mount horiz with vent holes down, thermally protected. other info near sku: E44549 LR4642 and near words copper conductors only is 174050-01 Thank you! LisaReply
Matthew Posted: 8/20/2018
Hello Scott - unfortunately we do not have a wiring diagram for the capacitor. But if you have not yet disconnected the old capacitor, you can take a picture of the wire connections as they are now for referencing when installing the new capacitor. We have an article concerning the low-speed issue on dual speed pumps, give it a read: My Pool Pump Runs On Low Speed But Not On High SpeedReply
Scott Posted: 8/18/2018
Hi do you have the wiring schematic for the capacitors on a B2982 AO smith century? Would one cause the pump to only run on high speed and not low speed? (run capacitor?)Reply
Matthew Posted: 8/3/2018
The B852 uses two of the 203 style motor bearings. We have a motor bearing chart page and a few part diagram pages for pool pump motors. Plus, you can always contact us at 407-834-2200 or email to upload@inyopools.com for help with finding motor bearings. We'll likely ask for a part, catalog or model number listed on the motor label; or, a clear picture of the label.Reply
Joe Posted: 8/2/2018
Hello! I just replaced my 3/4hp pool pump motor and all of the gaskets using a rebuild kit. It's running great. The motor that I took out of service looks pretty good though ... just needs new bearings and a new end cap (square metal flange 56y) The motor is a Century Centurion B2852. Any idea where I can get the bearings and end cap for this motor?Reply
InyoPools Posted: 7/27/2018
Hello Schrapnel - The K48L2PA105 would require two 203 bearings.Reply
Schrapnel Posted: 7/15/2018
Hello, I am looking for replacement bearings for an A.O. Smith pump part number K48L2PA105. Can you please point me to the right ones? Thanks and God Bless.Reply
Inyopools Posted: 7/13/2018
Hello Peter - The replacement for the C48M2EC11C3 is model Q1152. Unfortunately, we do not carry that motor.Reply
Peter Haynes Posted: 7/9/2018
I need a replacement motor for an A. O. Smith motor # C48M2EC11C3. It also has a label on the motor # 0813010 It is a pump motor, 2HP, 120/230V 60 hz single phase, 3450rpm, SF 1.1, and has a square flange motor, 5/8" shaft with an impeller retainer screw in the end. Rating is cont, Thermally protected, Ambient 50 deg C, Max amps 24/12, It is for a SW pump. can anyone suggest a supplier to cross reference this motor please?Reply
Inyopools Posted: 3/5/2018
Burel - I'm not finding your motor under C48K2EB23. Can you recheck the number and give me more information like Manf and model, a second model number, HP, SF Amps and FR.Reply
Burel Posted: 3/2/2018
Hi I am looking for the references and prices of the bearings and the starting capacitor for a referenced motor : C48K2EB23 Regards MarcelReply
InyoPools Product Specialist Dennis R. Posted: 9/25/2017
Frustrated with pump - Here's another guide that goes into more detail on windings, "How To Use a Multimeter to Test a Pool Pump Motor - Winding Resistance".Reply
Frustrated with pump Posted: 9/23/2017
Thank you for the reply. I checked the guide on "How the Common Capacitor Start Pool Motor Works". Didn’t see anything in there about the windings and how to check if they have shorted out. Please help.Reply
InyoPools Product Specialist Dennis R. Posted: 9/23/2017
Frustrated with pump - Check for continuity on your motor windings. They may have shorted out. See our guide on "How the Common Capacitor Start Pool Motor Works".Reply
Frustrated with pump Posted: 9/22/2017
I’m also having an issue with my AO pump motor. Mine is connected to a pump for the sprinkler system. I have tested the pressure switch, checked voltage and replaced the start capacitor. Still nothing. No humming, clicking or anything. Motor #C48K2PA105 Any thoughts? I cleaned the contacts on the switch and the pressure switch. Tried wiring it directly bypassing the pressure switch with no change. The shaft spins freely so it doesn’t seem locked up. What else should I check? I have removed it from the pump now. Is there a way to test it on the bench?Reply
InyoPools Product Specialist Dennis R. Posted: 9/17/2017
Redleg44 - A capacitor is often discharged after the motor is off a while. This is more a safety precaution. Check that the governor is not stuck open. The thermal overload may be defective. Try replacing it. Also, check for a short(s) in your motor winding.Reply
Redleg44 Posted: 9/16/2017
I have a pool pump with an AO Smith model number C48L2N134B1 Motor. With the timer switch on it does nothing. No hum to hear or feel. There is 240 volts present at the terminal. The start capacitor looks OK; an ohmmeter reads no continuity (not shorted) but there was no charge on the capacitor when I attempted to discharge it before reading continuity. The start switch appears to be closed. The only thing I can think might be wrong is the thermal overload may be permanently open.Your thoughts?
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InyoPools Product Specialist Dennis R. Posted: 9/7/2017
Rusty75 - Unfortunately, we do not have instructions for replacing motor windings. It is my understanding that this requires special equipment and the tolerances required are not something most people would attempt. Usually, when a motor's winding had to be replaced, you'd take them to a motor shop, but due to relative costs, that's really done now.Reply
Rusty75 Posted: 9/4/2017
I have a Sta-rite 1.5 hours SNF-L pump. I have broken it down all the way and tested the windings as directed. I get an OL on my multimeter when I test L2 and Red (power & windings through start windings). So I believe they are bad. How do I replace the windings? The motor would turn on and hum while barely turning(maybe 5-10 evolutions) and then cut off after about 10 sec. Bearings are fine and nothing impeding it as the shaft spins freely.Reply
InyoPools Product Specialist Dennis R. Posted: 7/13/2017
cuzy - Here are links to the three parts you requested for your motor, model #K48L2N104, aka CT1102.front bearing - Bearing, 304 Ntn-6304-ll (6304) - $21
back bearing - Bearing, 203 (62032rs) (Single) - $21
fan - Essex Group Cooling Fan, Id 25/32in O.d. 4 3/4 In (saw-48) - $35
And the mysterious "How To Replace the Cooling Fan on an AO Smith Motor" is still in process.
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cuzy Posted: 7/12/2017
Hmmm, so where is this mysterious"How To Replace the Cooling Fan on an AO Smith Motor" that you mention at the end of this document?Wouldn't you know it, I just replaced my overheating AO Smith pump motor (thanks for sending me your excellent replacement Century motor, it works like a champ), and when I removed it from the pump, I discovered its internal cooling fan had self destructed.
I'm considering buying the fan and bearings, but I'd like to know the cost of all 3 items as well as availability (and part #s) for my old motor first. Its model # K48L2N104, serial 22310FM, 1HP SF 1.5 56J Frame motor.
Not sure if it is worth it to "rebuild" it with these 3 items, when I now have the new motor. Should I bother, just to have a "backup" motor?
Regards, Cuz.
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Anonymous Posted: 10/11/2016
You discuss replacing the motor bearing[s] but no reference to size or where to purchase [including the seal. I've found the bearing but nothing about the flange seal. Some info on this would be very helpful. Thank you.Reply
InyoPools Product Specialist Dennis R. Posted: 7/13/2015
novice - Yes the run capacitor (25 MFD /370 VAC) in on top of the motor under a bump. The start capacitor will be under the electrical cover at the back of the motor. The start capacitor will be rated between 50-400 MFD and 125 or 250 VAC. See our guide on "How To Select the Right Capacitor For Your Pool Pump Motor" for more information on pool pump capacitors.Reply