20 Most Recent AO Smith 1.5 hp 3450rpm 56J Frame 115/230 Volts Hayward Northstar Swimming Pool Pump Motor - Electric Motor Questions & Answers

Don't think so, take them apart and you will find out. Be sure to have a replacement shaft seal.

Impeller could be plugged? Diffuser may have become misaligned and hitting the impeller? May have sucked up some foreign debris? Knocking could be a bad bearing.

service factor must match old motor ! motor must match impeller hp rating ! .. get the numbers off the impeller and search it on the web.. bet your motor is too small.. the easy fix ? buy the right impeller for your motor.. the things you need when buying a impeller are as fallows.. your motors hp and SF .. thats the service factor ! if the voltage is 120 v the motor set on 240 it will jump back and forth between start and run.. it will make a click ..click ..click noise .USE A VOLT METER. I smell a northstar a real pain of a pump.. REMEMBER TO BUY AMERICAN PRODUCTS (PLEASE) AND SUPPORT YOUR LOCAL POOL PUMP REPAIR GUY.. AND GIVE ME A THUMB OR TWO ,IF;N YA FEEL I WAS OF HELP ..JAY FLORIDA

notify goulds -----https://www.gouldspumps.com/en-US/Home/ or online search and open one of the 1000's of part sites

Yes this is an old thread but info is still helpful to those that are searching. Here is one diagram from a 3/4 motor. Be aware that most residential high voltage are 240v. This will have the motor turning a bit faster.

The values are stamped on the old capacitors. If you haven't got them, I would contact the manufacturers authorised agent for advice.

remove bump on motor and take picture of wiring before removing get numbers off try electrical supply

Try priming it water at the filter. Make sure that the filter o ring is sealing under the cap. Make sure there is enough water in the pool to enter the suction line and that it is not restricted.

Can't do it electrically. See if you can flip the armature and use that in that direction [bit of a long shot here - sorry]