Adam Koren-Roth
11-17-2022, 12:12 AM
I am looking for some help with diagnosing and fixing a start up issue with a unisaw i purchased over the summer.
the saw:
The saw is a 90s Delta No 83-654 with a 3hp Delta motor (model# 612512B).
the problem:
The saw hums when turned on and the blade tries to turn but doesn't unless i hand start it by turning the fan and then it will start successfully for a few minutes before the problem returns.
https://youtube.com/shorts/Z3uxjSMEzrw?feature=share
where i’m at:
From what ive read it seams like the issue is either the startup capacitor or the centrifugal switch. Using a grizzly maintenance/repair video, i checked the capacitor with a electrical tester and it seemed off but it was hard to tell because it has a bleed-down resistor wired in that i don’t feel confident removing. Next off i tried to get at the centrifugal switch to see if theres sawdust jammed up in it or its otherwise faulty but I’ve been having a heck of a time trying to get the motor cap off. I pulled out the 4 bolts holding the cap on but cant figure out how to get the fan off which seems to be in the way.
https://youtube.com/shorts/48SbC_JeLPc?feature=share
My knowledge of electric motors is pretty weak so I have trying my best to figure it out off of forum post and youtube videos but im not all that confident ive pinpointed the problem so any help would be much appreciated
the saw:
The saw is a 90s Delta No 83-654 with a 3hp Delta motor (model# 612512B).
the problem:
The saw hums when turned on and the blade tries to turn but doesn't unless i hand start it by turning the fan and then it will start successfully for a few minutes before the problem returns.
https://youtube.com/shorts/Z3uxjSMEzrw?feature=share
where i’m at:
From what ive read it seams like the issue is either the startup capacitor or the centrifugal switch. Using a grizzly maintenance/repair video, i checked the capacitor with a electrical tester and it seemed off but it was hard to tell because it has a bleed-down resistor wired in that i don’t feel confident removing. Next off i tried to get at the centrifugal switch to see if theres sawdust jammed up in it or its otherwise faulty but I’ve been having a heck of a time trying to get the motor cap off. I pulled out the 4 bolts holding the cap on but cant figure out how to get the fan off which seems to be in the way.
https://youtube.com/shorts/48SbC_JeLPc?feature=share
My knowledge of electric motors is pretty weak so I have trying my best to figure it out off of forum post and youtube videos but im not all that confident ive pinpointed the problem so any help would be much appreciated