Awesome video. My grinder started smoking. I replaced brushes and brush holder as they melted on. Grinder now makes a high pitch wizzing noise? Any ideas? Cheers
Hi, could be a few things. Sometimes it takes a bit for the new brushes to "run in" this could also make a bit of a wizzing noise. Did you take the head off? maybe its now rotated and not in the original position anymore (check the handle position to the power on button) I also had it mounted in the wrong position, and this caused it to make a high pitch screaming sound (coming from the gear reduction). Also put new grease in the gear reduction this helps too and it probably had a life before so :p
Hi. Did the same thing today with my dga 452, replaced brushes, checked the armature (no short circuits), but after reassembling it doesn't run smooth or constant as new, after a few seconds the speed varies and it come back again but has enough power to cut someting. I noticed a little bit of play on the big bearing. What do you think? What should I do? Thanks in advance.
hi, sounds more like a brush is not seated correctly or a bad connection somewhere in the system. Sometimes the brushes have to "run in" a little bit so they make sufficient contact with the armature. And i would suggest you check if the brushes move freely up and down, if one sticks a bit it can cause a bad connection. Before i replaced the armature in mine, it would behave the same as you discribed. It burned trough a set of brushes regularly and it melted the black endcaps away with them. I then decided to replace the complete armature and brushholder (the white part) and it runs like new again. I too had measured no fault in the old armature but mine was completely worn out where the brushes run on the copper part.
@@thebrojectlist6881 I replaced even the brush holder, brushes runs smoothly in place, cleaned the copper colector with fine sandpaper, so it's making very good contact. I feel the brushes a little bit hot after some time even running it without cutting/grinding. Just made a video today. Thanks. th-cam.com/video/b9XxlYusuR8/w-d-xo.html
@@calinsandor9518 i've watched your video :p i would say it"s still a bad connection on something (check the cables and the on/off switch) or still a faulty armature. Before i replaced the armature in mine, it would do the exact same thing, often even worse and more frequent.
@@calinsandor9518 Well it wouldn't hurt to do that but check for bad connections first. If you give it a whack when the speed drops, does it come on again? Also did it do this before you replaced the brushes?
Awesome video. My grinder started smoking. I replaced brushes and brush holder as they melted on. Grinder now makes a high pitch wizzing noise? Any ideas? Cheers
Hi, could be a few things. Sometimes it takes a bit for the new brushes to "run in" this could also make a bit of a wizzing noise. Did you take the head off? maybe its now rotated and not in the original position anymore (check the handle position to the power on button) I also had it mounted in the wrong position, and this caused it to make a high pitch screaming sound (coming from the gear reduction). Also put new grease in the gear reduction this helps too and it probably had a life before so :p
Hi. Did the same thing today with my dga 452, replaced brushes, checked the armature (no short circuits), but after reassembling it doesn't run smooth or constant as new, after a few seconds the speed varies and it come back again but has enough power to cut someting. I noticed a little bit of play on the big bearing. What do you think? What should I do? Thanks in advance.
hi, sounds more like a brush is not seated correctly or a bad connection somewhere in the system. Sometimes the brushes have to "run in" a little bit so they make sufficient contact with the armature. And i would suggest you check if the brushes move freely up and down, if one sticks a bit it can cause a bad connection. Before i replaced the armature in mine, it would behave the same as you discribed. It burned trough a set of brushes regularly and it melted the black endcaps away with them. I then decided to replace the complete armature and brushholder (the white part) and it runs like new again. I too had measured no fault in the old armature but mine was completely worn out where the brushes run on the copper part.
@@thebrojectlist6881 I replaced even the brush holder, brushes runs smoothly in place, cleaned the copper colector with fine sandpaper, so it's making very good contact. I feel the brushes a little bit hot after some time even running it without cutting/grinding. Just made a video today. Thanks. th-cam.com/video/b9XxlYusuR8/w-d-xo.html
@@calinsandor9518 i've watched your video :p i would say it"s still a bad connection on something (check the cables and the on/off switch) or still a faulty armature. Before i replaced the armature in mine, it would do the exact same thing, often even worse and more frequent.
@@thebrojectlist6881 probably I'll end up replacing the armature too and the bearings.
@@calinsandor9518 Well it wouldn't hurt to do that but check for bad connections first. If you give it a whack when the speed drops, does it come on again? Also did it do this before you replaced the brushes?