Dewalt belt sander stops sanding when pressure applied

DeWALT DW433 Type 1 3 21 Variable Speed Belt Sander Parts


And the correct tools

You might try Dewalt. I have a Black & Decker weed eater that had a broken belt and I had to order it from Dewalt. I was told that they had some kind of merger. Ordered it and it worked just fine.

There is a belt adjustment know on the side of the sander. Turn the adjustment know back and forth while the sander is running until it centers itself.

You can probably get an owners manual at www.retrevo.com It's a free site but requires registration (also free).

Check the brushes for the motor they may have gone bad or broken, I have seen this happen before on dewalt tools.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

could be stuck bearing or loose screw on the drive. give me the model number and I will try and find you a breakdown for it.

You may be applying too much pressure. Also it is my experience with this type sander that one has to use the side of the pad. If you try to use the whole flat pad they chatter. For flat sanding I use a "Jitterbug" type sander. What you have is for coarser work I SUSPECT than what you are trying to do. The quarter sheet type would probably be better for you.

have you checked the fuse first.
possibly worn brushes on the motor, remove the brushes and check the length of them , also look to see if they are pitted or burned.

All sander will have two adjustments. The first is to release the sanding belt by retracting the position of one of the rollers. The second adjustment moves one of the rollers belt tension from side to side. The roller angular position is changed, sometime by a single knob or screw, and sometimes by two separate adjusting screws.

I am assuming you have a 5" pad palm sander. IF pad stops then belt is broken