Sparking Skilsaw HD77 saw

[dhstannard]

Hi,

My neighbor gave me a gift of a relatively new Skilsaw HD77 worm drive saw. That he said doesn't work.

In reality it does 'work' except that it produces a lot of sparks coming from the armature end. I checked the 2 brushes and they seem to have a significant amount of material left.

Before I take the saw apart, I thought that I should check this group's wisdom on most likely causes so that I spend my time and money wisely.

Thanks

David

[emo325]

hello! if the carbon brushes are good check the commutator bars for burns, distorted, loose bars also check between each bar gap make shure there is nothing in between causing a short. also check the armature for burn marks or delamination. and last check the field for damage and burn marks of discolering. good luck!