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  1. 4th April 2021, 02:04 PM #1
    graham.murfett
    graham.murfett is offline Senior Member
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    Default Start cap for 750W (1HP) dust extractor

    G'day
    I think i found the reason my dust extractor wont start.

    dusty-cap.jpg

    Trouble is... it exploded exactly where the cap info is eg uf & watt info.

    Can anyone tell me what cap i need, and possibly where to buy one on the Qld Sunshine Coast?

    Thanks
    Graham
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  2. 4th April 2021 02:04 PM # ADS
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  3. 4th April 2021, 02:35 PM #2
    China
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    Any electrical wholesaler will have one take the old one plus the the motor specs with you.
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  4. 4th April 2021, 02:35 PM #3
    dinosour
    dinosour is offline Senior Member
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    Sometimes the value of the capacitor is on the motor data plate, it’s voltage is usually 440v
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  5. 4th April 2021, 02:35 PM #4
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    Fuzzie
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    The start cap on my old dusty blew up a couple of years ago. I eventually tracked down a $$ replacement cap, but I was warned when purchasing it that the motor itself was probably the fault. It did in fact blow again soon after replacement. I would be thinking of finding a motor rewinder to check out the motor first or just go out and buy a new one.
    Franklin
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  6. 4th April 2021, 02:47 PM #5
    Bohdan
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    A typical value for a start cap for a 1hp motor would be from 140-180µF with about a 300v rating. This value is not critical so anything in that range would do.

    Google "electric motor repair" and you will find plenty of suppliers.
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  7. 4th April 2021, 05:25 PM #6
    graham.murfett
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    Thanks for all the prompt replies.

    I'll hit the electrical wholesalers etc 1st thing Tuesday.
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  8. 4th April 2021, 06:50 PM #7
    Pete57
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    I found local electrical supplier did not have much choice but found one that suited my pool pump. For my very old bandsaw motor, got one through Machinery House spares.
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  9. 4th April 2021, 10:10 PM #8
    aarggh
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    Washing machine repair places also have similar rated caps. As Bodhan mentioned the value isn't overly critical generally, more so that the voltage rating has a good overhead.
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  10. 5th April 2021, 12:03 AM #9
    Jeffen
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    When my compressor cap went (just like yours) my local Jaycar had the exact replacement for about $20
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