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Forum topic by firefighterontheside posted 10-01-2018 01:05 AM 898 views 0 times favorited 58 replies Add to Favorites Watch
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firefighterontheside

19259 posts in 2032 days


10-01-2018 01:05 AM

I bought this saw. Apparently it needs a start capacitor. Is this an easy thing to fix? Thanks.

-- Bill M. "People change, walnut doesn't" by Gene.


58 replies so far

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lumbering_on

564 posts in 666 days


#1 posted 10-01-2018 01:13 AM

Depends on your skill level, but generally it’s not that difficult. I’m not familiar with the Unisaw motor, but the capacitor should be mounted to the top of the motor and would be under a separate cover. The only question would be how do they know it’s only the capacitor?

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firefighterontheside

19259 posts in 2032 days


#2 posted 10-01-2018 01:46 AM

Yes, that’s a good question.

-- Bill M. "People change, walnut doesn't" by Gene.

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Rick Dennington

6245 posts in 3370 days


#3 posted 10-01-2018 02:29 AM

Bill,

The start capacitor should have a dome-shaped cover with 2-3 screws holding it down…Remove the cover, and check to see if it’s burned, blown, or possibly “swelled up” caused from blowing….If it is just remove it, take it to town to an electric co. or an electrician for a replacement…Also, remember which wires go on which terminals…Most have four…It may not make any difference, but if it’s the capacitor, mark the terminals with a red Marks- a lot….

-- " It's a rat race out there, and the rats are winning....!!"

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firefighterontheside

19259 posts in 2032 days


#4 posted 10-01-2018 02:44 AM

Thanks Rick. I’ll open it up on Wednesday after work.

-- Bill M. "People change, walnut doesn't" by Gene.

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Rick Dennington

6245 posts in 3370 days


#5 posted 10-01-2018 02:47 AM

Bill,

If all it is is a blown capacitor, that’ll be an easy fix…..Let’s just hope that’s all it is….!! Good luck..!

-- " It's a rat race out there, and the rats are winning....!!"

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TheFridge

10504 posts in 1662 days


#6 posted 10-01-2018 04:43 AM

It could be the centrifugal switch as well. Same symptoms as a bad starting cap but most times it’s a lot easier for most to spend 5-10$ to avoid cracking the motor open.

Huge fan of new bearings for used equipment. Don’t cost much and can up the value of equipment to be resold. It’s a bargaining chip that’s worked in my favor many a times.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

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boxcarmarty

16652 posts in 2536 days


#7 posted 10-01-2018 12:38 PM

Bill, what makes you think it is the start capacitor that is bad???

-- My mind is like lighting, one brilliant flash, then its gone.....

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artsyfartsy

1064 posts in 1334 days


#8 posted 10-01-2018 12:57 PM

Before you take it apart and remove the wires, take a photo with you phone. I do that all the time when I’m repairing things so I can remember which wire went where it’s supposed to go when I’m replacing.

-- DWelch. Michigan, The only dumb question is the one not asked!

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firefighterontheside

19259 posts in 2032 days


#9 posted 10-01-2018 01:02 PM



Bill, what makes you think it is the start capacitor that is bad???

- boxcarmarty

The guy told me when I bought it that the start cap was bad. I’m sure he could be wrong. I can change several cheap parts and hope something fixes it. I’ll get a better look on Wednesday.

-- Bill M. "People change, walnut doesn't" by Gene.

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boxcarmarty

16652 posts in 2536 days


#10 posted 10-01-2018 01:07 PM


Bill, what makes you think it is the start capacitor that is bad???

- boxcarmarty

The guy told me when I bought it that the start cap was bad. I’m sure he could be wrong. I can change several cheap parts and hope something fixes it. I’ll get a better look on Wednesday.

- firefighterontheside


I have seen the switch go out on the Unisaws on more then one occasion…..

-- My mind is like lighting, one brilliant flash, then its gone.....

View DDWW's profile

DDWW

90 posts in 802 days


#11 posted 10-01-2018 06:03 PM

How did this work out for you? The cap is an easy fix,

if its the Magnetic start switch thats pricey. It can be DIY. The electronic parts are third party exact replacements may not be manufactured. If you understand what your buying you can buy components on Amazon and Ebay and rebuild the starter.

The cheap way to do it is to use a Grizzly magnetic starter. they have several choose the one for the amps your motor draws.

My unisaw doesn’t like to work below 45 degrees and occasionally I have to whack the starter box to shake saw dust off the relay.

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firefighterontheside

19259 posts in 2032 days


#12 posted 10-01-2018 08:06 PM

After looking at it closer, the original switch has been removed and a “light switch, was wired into the cord in a junction box. Perhaps it is just the switch. I will open up the capacitor and take a look at it.

-- Bill M. "People change, walnut doesn't" by Gene.

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lumbering_on

564 posts in 666 days


#13 posted 10-01-2018 11:42 PM

BTW, does it start at all?

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firefighterontheside

19259 posts in 2032 days


#14 posted 10-01-2018 11:45 PM

I haven’t had any time to try it. I loaded this stuff into my garage last night and then went inside to get my sons ready for bed. Now I’m at work until Wednesday morning. I’ll look at it on Wednesday.

-- Bill M. "People change, walnut doesn't" by Gene.

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firefighterontheside

19259 posts in 2032 days


#15 posted 10-03-2018 04:44 PM

I’m afraid this Unisaw is gonna be the loser of the bunch of tools I bought. The motor is not original to the saw and it appears to be rigged to work. There is a homemade guard built around the start capacitor. It is 3 hp and says it can run on 110 or 220 and 32 or 16 amps respectively. I can’t plug it in unless I make an extension cord to run into the shop.

-- Bill M. "People change, walnut doesn't" by Gene.

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