Question about Heavy Duty DeWalt 18V 6 12" Circular Saw DC390K

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How do I replace the blade guard on a Dewalt DC390K saw

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Remove the clip behind the back blade flange holding it on to the housing and lift it up of the return spring, replace the opposite way remembering to relocate the return spring. Make sure you get the model number correct as the 390 and 390k are different.

Posted on Jan 02, 2013

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Posted on Jan 02, 2017

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Its sounds like the blade lock button is depressed.
looking from the rear of the unit, you should see a button between the left side of the handle and behind the blade shield.
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I hope this helps.

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I HAVE A DW716 MITER SAW AND NEED TO CHANGE THE BLADE, BUT I'M NOT SURE EXACTLY HOW TO REMOVE THE BLADE GUARD. I KNOW THAT I NEED TO PURCHASE THE CORRECT BLADE WRENCH TO DO THE JOB. CAN YOU TELL ME THE...


Hi there
You do not need to remove the blade gaurd to change the blade. You only need to raise it enough to acces the blade screw. Unplug the saw. Raise the blade arm. Raise the guard to it's upper position. On the left side of the blade, just forward and up slightly from the blade screw is a screw for the guard bracket. Loosen, but do not remove this screw. Once it's loosened the guard can be raised farther exposing the blade screw.
pg 6 of the manual illustrates this process, here's a link so you can see the parts I am discribing,
http://servicenet.dewalt.com/Products/Detail?isId=true&productNumber=DW716&selectedType=12803#
click the pdf icon next to instruction manual, then open the file.
As for the blade wrench, this should have come with the saw, there is a slot in the base for storing the wrench, on the back left side, it slides in and out for safe keeping. If you have misplaced the wrench the DEWALT part number 608563-1

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Not cutting through wood. Cuts are diminishing.


Sounds like the wood your cutting through is to hard for your battery powered saw....try one with a cord they work much better, especially for hardwood's.

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How do i get guard out of way to replace blade..DW718


Make sure the saw is unplugged, manually move the blade guard up to it's fullest extension, push the arbor lock to make sure the arbor and blade do not spin (on front of saw motor housing), then wrench the nut holding the blade to remove. Remove the old blade, install new one and reassemble in reverse order. You can take the guard off completely if you choose, but it is not necessary. I hope this helps and good luck!
PLEASE REMEMBER TO VOTE AND LEAVE A TESTIMONIAL. THANK YOU

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Spindle and spindle hole in blade different shapes


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1 Answer

Repair spring to lower guard to spring back on dewalt 18v dc390 saw


You may be able to salvage the torsion spring that is there. Sometimes the end will break off and you can bend yourself a new end and just stick it back into the retaining hole in the housing or guard. There may be damage to the guard which will not allow you to just bend the spring to make a new joint. Either way, you need to know what you are dealing with. First remove the blade if you haven't done so already. Then remove the bumper (rubber piece) that stops the guard from returning too far. Next you will need a pick or a small flat head screwdriver. Look around the hub and you will notice a retaining ring. You will have to use the pick or screwdriver to get the ring started. Look for a little tab around the perimeter of the hub. You will have to work that tab out and make sure you keep your pick or screwdriver under it. Then work it around and off the hub. Then you can remove the guard from the hub. The spring is located under the guard and is a torsion spring. Look for damage to the guard and the housing as well as the spring. If there is any question to the integrity of the guard you should replace it. The part number for the torsion spring is 612517-00 ($1.50), the retaining ring is 150383-00 ($1.50) just in case you break it, and the guard number is 611925-00 ($6). If you have any questions please post back.

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Dewalt miter saw .


Either the blade or the guard is out of alignment. You will have to check and find out which one is the culprit.

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