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Dewalt drill 988 18v chuck wont open

Post in 'DIY and General non-hearth advice' started by Shipper50, Nov 10, 2008.

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  1. Shipper50

    Shipper50 Minister of Fire

    Nov 10, 2007
    I have a Dewalt cordless tool set with drill, saw, light and others and today my 18 volt 988, on my hammer drill the chuck wont open. I can hold the chuck with my hand with enough force to stop the movement and the chuck would normally open in reverse.

    Any help would be appreciated.


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  2. flewism

    flewism Member

    Aug 22, 2006
    newport MI
    how old is the drill? Find a Dewalt service center these people are amazing. If it is still under warranty they will replace the chuck and anything else they find wrong and they will look. I have a 13 year old 18 volt hammer drill bought when 18 volt was the latest thing out on the market. I dropped for the umpteenth time off a 6' step ladder about 2 years ago, but this time it broke, the motor would run but the chuck would not spin. I took it in and their policy is $99 maximum cost. on mine they replaced the chuck, drive assembly, and the motor for $99 on a 10 plus year old drill. basically I got a new drill for $99 the case and the trigger switch was the only thing not replaced. That is their policy $99 maximum repair cost on any of their power tools.
  3. tkirk22

    tkirk22 New Member

    Nov 20, 2007
    VA Mountains
    Try tapping on the chuck with 2 hammers simultaneously from each side.

    I can't help you with specifics on removing the chuck other to say that a new chuck is about $30 at lowes. All the chucks I have personally replaced were simply screwed on and I use an impact gun to spin them off.

    They make special chucks that can take the hammer action so keep that in mind if you replace it.

    Incidentally, I borrowed a corded DeWalt hammer drill the other week to drill about twenty 1/2" holes in concrete. Each hole took several minutes and I let the drill cool down between each hole. After 6 holes, the trigger switch failed due to a design flaw in a connector. $30 later, I replaced the switch (design flaw was fixed) and gave the drill back.

    Then I bought the right tool to drill holes in concrete: a rotary hammer. It went through the concrete like butter. Harbor Freight has their Chinese model for about $60 and Northern Tool has one for $100. Both come with 3 or 4 SDS bits and a one year warranty.

    I absolutely hate buying Chinese tools but I couldn't justify spending $400+ for something I will use about 10 minutes a year.
  4. PaulRicklefs

    PaulRicklefs New Member

    Sep 24, 2008
    La Ronge, SK Canada
    I got the same drill. You may need to use some force to open it, like a couple of pipe wrenches, but it will release. Once you crack it loose oil the heck out of it with 3 in 1 or even wd-40 (although the latter won't last as long). I use my drill daily and I find the only time I have issues is when I forget to lubricate.

    Good luck.
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