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  1. #1
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    Looking for a motor for Ridgid R4512

    My Ridgid R4512 table saw died, suddenly. I've read that the switch is the most common cause for this, so I replaced it -- still no power. I call Ridgid support and they told me that from my description of the circumstances, and if I'd already tried replacing the switch, the problem was the motor.

    Anybody have one in working order that they'd be interested in selling? I can get a new one from Ridgid but the cost with shipping is close to what I paid for the whole table (used).

    Thanks.

    Jeff

  2. #2
    Senior User LastChanceWoodshop's Avatar
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    Re: Looking for a motor for Ridgid R4512

    Jeff,

    Before you go replacing the motor, did you double check that the switch is working and check the motor starting capacitors? A starting capacitor is probably in the $10 range.
    There's never enough time to do it right, but there's always enough time to do it over.

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  4. #3
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    Re: Looking for a motor for Ridgid R4512

    Did you smell anything when the motor died suddenly? Is it an open or a closed motor? Full of sawdust? Can you run a ground test on the leads to see if the windings are good? Does it hum when you turn on the power?

    Roy G

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  6. #4
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    Re: Looking for a motor for Ridgid R4512

    Okay, thanks for the suggestions, but I have to show my electric motor ignorance here. What happened was the that the saw tripped the circuit breaker at the box while operating, and when the breaker was reset the saw would not turn on.

    Quote Originally Posted by LastChanceWoodshop View Post
    Jeff,

    Before you go replacing the motor, did you double check that the switch is working and check the motor starting capacitors? A starting capacitor is probably in the $10 range.
    I replaced the switch with a new one. Neither new nor old had any effect -- no reaction, no sound, nothing. I don't know where to look for a starting capacitor -- doesn't appear in the parts diagrams or lists.



    Quote Originally Posted by Roy G View Post
    Did you smell anything when the motor died suddenly? Is it an open or a closed motor? Full of sawdust? Can you run a ground test on the leads to see if the windings are good? Does it hum when you turn on the power?

    Roy G
    No smell. Closed motor, I believe. No hum.

  7. #5
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    Re: Looking for a motor for Ridgid R4512

    Jeff,

    My electrical knowledge is also limited! This video seems to demystify troubleshooting the starting capacitor:

    https://m.youtube.com/watch?v=4k4c998kLKc

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  9. #6
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    Re: Looking for a motor for Ridgid R4512

    Quote Originally Posted by zdorsch View Post
    Jeff,

    My electrical knowledge is also limited! This video seems to demystify troubleshooting the starting capacitor:

    https://m.youtube.com/watch?v=4k4c998kLKc
    Thanks! I'll explore this!

  10. #7
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    Re: Looking for a motor for Ridgid R4512

    Jeff, when you reset the breaker, did it close all the way? Do you have the right voltage at the outlet? Is there a thermal reset button on the motor?

    Roy G

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  12. #8
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    Re: Looking for a motor for Ridgid R4512

    Quote Originally Posted by Roy G View Post
    Jeff, when you reset the breaker, did it close all the way? Do you have the right voltage at the outlet? Is there a thermal reset button on the motor?

    Roy G
    Yes, breaker reset fine, and I checked by plugging other devices into the outlet. Voltage-wise it’s the same outlet I’ve been running the saw on for about a year. I looked for a reset button and didn’t find one — also, no mention of one in the owner’s manual.

  13. #9
    Senior User LastChanceWoodshop's Avatar
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    Re: Looking for a motor for Ridgid R4512

    To satisfy yourself that the switch is working, do you have access to a multi-meter or a test light? As to the starting cap, I don't see one on the parts diagram either. But if I had to guess it's inside that square housing on the back of the motor:

    Attached Images Attached Images
    Last edited by LastChanceWoodshop; 09-08-2018 at 02:41 PM.
    There's never enough time to do it right, but there's always enough time to do it over.

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  15. #10
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    Re: Looking for a motor for Ridgid R4512

    My Ridgid saw is an older model (TS 3650) but the motor may be the same. The reset is on the motor wiring cover, and the starting capacitor is on the bottom side of the motor housing>



    Go
    Practicing at practical woodworking

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  17. #11
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    Re: Looking for a motor for Ridgid R4512

    Quote Originally Posted by Gofor View Post
    My Ridgid saw is an older model (TS 3650) but the motor may be the same. The reset is on the motor wiring cover, and the starting capacitor is on the bottom side of the motor housing>



    Go
    Thanks -- looks like this is going to be the project for the coming week -- I'll start by picking up a multi-meter. Thanks, everyone -- all this is really helpful and possibly money-saving.

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