Chosen Solution
Today i tried to polish my car using my Grinder, but after a few minutes of working, it stoped. I can open it, but i do not know what are its basic parts. If somebody point me where and what are the most possible parts to failure, it will be nice. It seems to me, that the damage happened because of the resistance applied on to the devise, while i push it on the surface of the car.
Hi @dorosk, If you have a DMM (digital multimeter) use its Ohmmeter function to prove that each wire in the power cord has continuity from end to end, from the plug to the connection in the grinder, just in case it is a broken wire in the cord. If the cord is OK it may be the trigger switch (supplier example only) or perhaps the carbon brushes to the motor. Here’s a parts list that shows all the parts that may help. The reason I linked a different supplier for the trigger switch is that this supplier shows that it is no longer available, but if you search for the part number i.e. 569159-00 you will find other suppliers that have stock.
Replace the motor brushes. I’ve fixed Many tools that way. I hope the commutator isn’t too bad. Most people don’t know to look at the brushes / commutator arcing on all brush motor tools. If it’s a constant low level blue - all’s good. As yellow then white start appearing and the size of the flashes get bigger - replace brushes. When you get the new set, compare lengths. The longer it’s run with yellow white arcing getting worse, that’s damaging the commutator.
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