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Thread: Vacuum pump removal

  1. #1
    CTJER's Avatar
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    Default Vacuum pump removal

    Had a vacuum pump failure on my O-235 Colt. Plan on a RAPCO replacement.Problem is I can't get the old one removed. The problem is access to the lower left nut. Tried grinding down a 7/16 wrench without success. Any suggestions for a proper tool?

    Jerry

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    Gilbert Pierce's Avatar
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    Last edited by Gilbert Pierce; 08-25-2019 at 06:01 PM.

  3. #3
    CTJER's Avatar
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    Default Re: Vacuum pump removal

    Thanks. I knew one of you Shortwing gurus would be able to point me in the right direction. Next problem is to figure out how Aircraft Spruce works the core credit. Tried to order on line just now and expected a direction on this. Nothing. Will call them tomorrow.

    Thanks again Gilbert!

    Jerry

  4. #4
    andya's Avatar
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    Default Re: Vacuum pump removal

    I have ground down several 7/16 box wrenches for different engine installations. The key is to cut a slot in the box of the wrench so all you have to do is slip the end of the stud through the gap in the box and slide it fwd on the nut. Have used the wrench Gilbert suggests but have better luck with my modified box wrench.
    "Progress is our most important problem"

  5. #5

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    Default Re: Vacuum pump removal

    Well since THAT one nut is such a pain in the arsh to get on and off. If you are lucky the last person that put on the vacuum pump tighten that nut with a FLAT BLADE screw driver. So try tapping it off the same way. I know mine came off that way and I know several A&Ps that do the same.

  6. #6
    CTJER's Avatar
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    Default Re: Vacuum pump removal

    Will give it a try.

    Tks - Jerry

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    Default Re: Vacuum pump removal

    Quote Originally Posted by andya View Post
    I have ground down several 7/16 box wrenches for different engine installations. The key is to cut a slot in the box of the wrench so all you have to do is slip the end of the stud through the gap in the box and slide it fwd on the nut. Have used the wrench Gilbert suggests but have better luck with my modified box wrench.
    Ground down, heated with a torch and bent 90 degrees. Thatís what I use. Oh yeah, start off with a very thin wrench!


    Sent from my iPhone using Tapatalk

  8. #8
    CTJER's Avatar
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    Default Re: Vacuum pump removal

    None of it worked. Therefore it's a RAPCO replacement and tool or...………...I'm thinking of chucking all the gyro instruments in favor of a Foreflight synthetic purchase. Back up would be a Garmin 295. Thoughts?

    Jerry

  9. #9
    Gilbert Pierce's Avatar
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    Default Re: Vacuum pump removal

    Quote Originally Posted by CTJER View Post
    None of it worked. Therefore it's a RAPCO replacement and tool or...………...I'm thinking of chucking all the gyro instruments in favor of a Foreflight synthetic purchase. Back up would be a Garmin 295. Thoughts?

    Jerry
    No vacuum in my airplane. Mini 5 iPad, Stratus 2 with attitude indictor. Also an electric turn and bank for needle ball and airspeed if necessary. Backup GPS Anywhere Map and BK Aviator Ace under the seat.

  10. #10

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    Default Re: Vacuum pump removal

    Too many thoughts to post. I've wavered both ways, modern and steam. I've listened intently to others but at this point, I have a mix of both so that means my vacuum pump is still in place and my fast i-tablet has the latest FlyQ with WiFi with ADS-B in from a cheap flightbox source. Think it through for you - just you. When you're alone and sweating a bit...what might happen - what you would depend upon at night, or when the weather gets bad, or both. FlyQ is on my big old iPhone6Splus too, as backup to the tablet. Then, there's always maps and compasses. I have deleted all VOR capability from my plane. My 2c.

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