Delta 17-900 chuck removal

Can anyone advise me on how to do this ? The owners manual doesn't say. I thought running the quill down, I'd see a space for a drift. The slots in the quill are there, but the taper goes in higher than the two slots. So I tried to unscrew the chuck it from the taper, thinking that would work, but so far no luck and I'm afraid of beating the chuck key any harder. I purchased a new 5/8 chuck (threaded) and it came with a #3 taper arbor to screw on so I can approach it either way - just can't seem to get either way to work for me.
jim in FL
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Adjust your stops for maximum depth and you should be able to slide a bar through the exposed slot and wack it down to get it out.
If that doesn't work you could probably chuck something like a big allen wrench in the chuck and use that for wacking on.
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Got it. When I lowered the spindle and looked through, i was only looking through the first set of slots - turning the spindle inside revealed another set that allowed access to the top of the arbor. Made a trip to the local surplus house and bought a drift, and it came right out.
One thing I noticed is my new arbor isn't quite as long as the old one by maybe 3/4 to 1" , but it fits nicely and very snug. Anything to worry about ?
Thanks
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