Grizzly GO 442 cyclone dust collector motor problem

[Mike Kees]

My dust collector motor just quit. Sort of started up once almost like a "soft start' then kicked in to full speed. This happened twice in last two days of use. Then when I switched it on again it started to go and just quit. The breaker had tripped,I reset it and tried again same thing. I have pulled the fan cover off end of motor and everything spins freely just as it should. At this point I suspect capacitors,how do you test/figure out if that is the problem. I pulled the switch cover to see if there was dust inside and blew it out.There was almost no dust anyway. Need to figure this out fast as I am building cabinets for a client and need my DC. Thanks,Mike.

[Bill Dufour]

Spin it up to speed by hand and turn it on. If it speeds up and runs like normal the start capacitor or start switch is bad. Do let it run more then one minute with no restriction on input or it may overheat.
I assume this is single phase?
Bill D

[Mikail Khan]

Most of the cap failures I have had you could see swelling or leakage.



MK

[Mikail Khan]

Cap testers can be purchased from amazon for about $20. Replacement capacitors can be purchased from grizzly for about $25.

MK

[Mike Kees]

I opened up the capacitor enclosure and they both look like new on the outside. Motor is 5 hp single phase.

[Bill Dufour]

Check ebay for caps. Should be under $10 for both. Since they look good I suspect the centrifugal switch. Many Asian motor makers use under voltage caps and they fail sooner then they should.

For 120 volt RMS. you need 170 volts
For 240 volt RMS you need 340 volts.
These are bare minimum I suggest 400 volt or better. More voltage costs only a few cents more.
Bill D

[Mike Kees]

Bill I was just on Grizzly's web site and looked up there part list. Start capacitor is 400m250v nd the run capictor is 40m450v. It is wired 240v. So if it is the centrifugal switch would that cause it to kick the breaker ? It has kicked the breaker three times now. That kind of worries me that more is going on than capacitors,centrifugal switch etc.

[David L Morse]

How long does it take for the breaker to trip? Is it instant or take a second or maybe several seconds?

How often do you start and stop it? On and off for each operation or run continuously through the day? How many starts per hour?

Do you vent outside or use the filter?

[Mike Kees]

Breaker trips in like 10 seconds or so. I group work as much as possible trying to run it 1/2 hour or more without start/stopping it but I probably still end up with 2-3 starts an hour. I use a filter,where I live it would cost me a fortune at -30 to vent outside.

[David L Morse]

Breaker trips in like 10 seconds or so. I group work as much as possible trying to run it 1/2 hour or more without start/stopping it but I probably still end up with 2-3 starts an hour. I use a filter,where I live it would cost me a fortune at -30 to vent outside.

Probably the start capacitor or the centrifugal switch. I would change the start cap first, it's the easiest thing to do. If that doesn't fix it the next thing is the centrifugal switch. You need to remove the back cover of the motor to get to it.

[Mike Kees]

Hauled the motor in to a motor repair shop today. It was the centrifugal switch contacts. They got replaced. So another weird thing about this TEFC motor is well it is not totally enclosed. the centrifugal switch is right under the fan on the end of the motor outside the enclosure. Tech guy at the motor shop told me to blow it out with compressed air about once a week while it is running. Thanks for all advice.