Have dewalt cordless jig saw. On opening the lift mechanism to take out the blade the lever napped. Try as a might I cannot see how it works to change the blade. The blade that is in there is useless and I cannot use the saw without changing the blade. Can anyone help??

Do the same procedure on how you installed the blade.

Dewalt Jig Saw

DeWalt Jig Saw MANUAL ManualsOnline com


Blade catch wears out too fast
I loved this tool when it was working but after not that much use the teeth that hold the blade under pressure no longer hold hard enough to prevent the blade from coming out. The mechanism that holds the blade has no catch hole, it uses a few serated teeth to pressure hold the blade in place. Unfortunately, once the pressure starts to lessen you can't tighten it down...

there is a very small spring under the mechanism that might have broken. To remove/install the blade you need to lift up on the lever to engage the nut to tighten the spindle until snug and then push the lever down.

You may try to find it in the part list http://servicenet.dewalt.com/Products/Detail/DC330K As the part near blade is stressed by vibrations also some screw might get loosen.
Juraj

this is a keyless change system and there is a lever on the side that you need to lift to remove/install blades. This tool uses the "t" shank blades. If you still need assistance go to Dewaltservicenet.com and in the middle of the site at the bottom type in the model number and you can view this manual online or download it, It is 7 pages long. Let me know if you need more assistance.

ive had this problem many times, first make sure you have the right blade, then you need to make sure you are seating it correctly, and tightening correctly.

bearing or brished worn out probably

check bearing and brushes, this was my problem on my SKIL 4280.

Try ;loosening/removing the hex head bolt that is right where you insert the blade to loosen things up

If you need further help, I’m available over the phone at https://www.6ya.com/expert/john_32f4b76dad4781c4

I have used the same tool. Make sure that the blade release/ hold tab is engaged. Maybe the return spring is fouled or stuck. Try some lubricant.