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  1. #1
    Junior Member marknett's Avatar
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    Porter Cable 7424xp problems?

    Porter Cable 7424XP bought 10-30-16. First, let me say that I have never owned or used a DA so I have no knowledge to compare to. When I first got the polisher , It did not seem to want to turn correctly. After talking about it on here , I thought maybe I'm pressing to hard. I have to have the unit on at least 5 or it will not spin when against the paint. It will stop turning constantly even with no down pressure. I can float the pad from the car and it takes 1 to 2 seconds before it will start back spinning. Seems it's worst about it on vertical surfaces. I s this normal? Like I said , I have nothing to compare against. Any suggestions? Oh and yes I do have the compression washer in. I using a 5" hook and loop back plate with 6.5" pads . Mostly the ones that came with the kit (CCS . So, Is it me or the machine?

  2. #2
    Junior Member marknett's Avatar
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    Re: Porter Cable 7424xp problems?

    Anyone?

  3. #3
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    Re: Porter Cable 7424xp problems?

    I use 5.5" pads and have no problems unless I'm pushing too hard. I only apply enough pressure to keep the pad flat on the surface. Let the machine do the work.

    I have a full sized truck so I have plenty of vertical surface to use it on.

  4. #4
    Super Member Dan K's Avatar
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    Re: Porter Cable 7424xp problems?

    That is a lot of pad for the PC to turn if they are 6.5" CCS smart pads. You will probably have to crank it up to 6 with those. Draw a line on your backing plate wth black marker so you can tell if it is rotating. Ease up on the pressure until it rotates at the speed you desire. Thin pads no bigger than 5.5" work best on that machine. Vertical panels that are not flat will definitely increase the problem.

  5. #5
    Super Member DaveT435's Avatar
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    Re: Porter Cable 7424xp problems?

    I agree 5.5 inch pads are the way to go. I don't know why they include 6.5 inch pads with that package. If you have an pads new and unopened I would try to exchange them.
    2015 F-150 Crew Cab Lariat
    2016 Chevrolet Camaro 2SS

  6. #6
    Super Member MarkD51's Avatar
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    Re: Porter Cable 7424xp problems?

    All good advice so far.

    Another thing I note that will bog down the PC D/A, even with 5.5" Pads and a 5" Backing Plate, is a Pad that becomes fairly saturated with products being used.

    That after 2, or 3 panels max, swap the pad for a fresh one, and begin again.

    Cleaning on the fly helps some, but still it is wise to have a good number of any given pad type on hand when correcting.

    That they not only saturate, but also get loaded up with various other nasties that shouldn't be in the mix with the correcting products being used.

    Even with a 5" Backing Plate, and 5.5" Pads, speed 5 on the dial will be usually the speed needed for correcting with some assurance of regularity of pad rotation.

  7. #7
    Junior Member marknett's Avatar
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    Re: Porter Cable 7424xp problems?

    Ok , Thanks for the advise. 5.5" pads and swap regularly. I hope this helps. I was starting to think this thing was broke

  8. #8
    Super Member dlc95's Avatar
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    Re: Porter Cable 7424xp problems?

    Are you keeping the pad flat? Maybe using the included handle?

    A tilted pad will be less inclined to spin.

  9. #9
    Super Member aztec1987's Avatar
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    Re: Porter Cable 7424xp problems?

    I tend to use 5.5" pad, have you drawn lines on your pad in order to see if the plate is spinning? I apply enough to have control over the machine but light enough to keep the plate spinning, too much pressure will just have the plate sit still and machine to vibrate. When you are done doing a pass just keep the machine still in the surface until it stops or else you will run into the life the bearings fast!
    "I don't consider myself to be the best.. and I don't like compliments.. they distract me." - Jimi Hendrix

  10. #10
    Junior Member marknett's Avatar
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    Re: Porter Cable 7424xp problems?

    I will try it with the handle and see if that helps. I have a black backing plate so I added a piece of green tape for spinning reference. I think the biggest issue may be the 6.5" pads. I will remember the waiting till it stops before lifting also.

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