brushes spark

[Augusto]

Hello. Can you tell me why the brushes spark is to high?

[Mark]

Hi Augusto,

Excessive sparking inside the rear vent holes is caused by an armature that has gone bad. The armature has shorted out and is now arching. The armature shorted out due to excessive load, usually caused by the type of work that was being done or by an extension cord that was too long and its wire gauge too small. The armature will need to be replaced. Many times when an armature is damaged the field will be damaged as well. You will want to have the field tested to see if it was damaged.

Unfortunately the armature and field have been discontinued for this version of the hd77 saw. You will likely need to replace the saw.

Good luck!


-Mark