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I burnt up my motor but all the bearings look good. The brushes look good as well. I bought all the bearings and the speed control. If I replace all these do you think it will work? If not, could the magnetic shield be damaged?

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  • adroessler Jul 23, 2009

    Does "replace the motor" mean: replace the field or replace the armiture? I'm trying to narrow it down in order to avoid spending more than I need to. Thanks,
    Adam

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Bearing are not the problem. The motor is toast. Replace the motor.

Posted on Jul 23, 2009

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2 Answers

Electrolux 6500 SR overheats.


If there is a dis balance in the armature a bearing was become hot and is not anymore in the center(middle) between the 2 stator coils the field magnet then one of the 2 carbon brush should become shorter then the other.
If there was too long a too much particulate matter in the vacuum cleaner bag then the motor was before running too hot with a lost airflow the field or armature become too hot and a thermal failure on one collector can made the difference , the color of the magnet field coils must be smooth and have not a dark brown color but have a fresh brass color the commutator on the armature have no great differences in the gaps between each other and if running the motor the rpm can sounds good but inspection on the sparks from the brushes is the first relation to see the color of the coils of the armature and the fieldmagnet but also the bearings must feel that its turns smoot. control the carbon brushes can be very important. not too short , if they too short DO NOT REPLACE BRUSHES if bearings color or the commutator surface is not smooth , change IF ITS rewarding only a motor like its a Kirby thats a choice here is how the color of the field should be
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3 Answers

I keep blowing the heater motor fuse motor tested good changed the resistor and the heater control unit but still blowing the fuse it doesnt blow if the resistor is unplugged any suggestions


Hi. If the brushes are worn or have worn in the past to the point where there is damage to the rotor commutator, that could blow fuses for you.

Are you saying the fuse doesn't blow when the heater is on "high" and the resistor disconnected?

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1 Answer

2002 grand caravan blower motor intermittent replaced resistor


in review
the fan speed resistor is new
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12 volts test ..only runs it at full speed
if cabin filer want changed the blower motor would run hotter

could be the motor brushes or bush/motor bearing when slowed
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does that have climate control ?
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1 Answer

Motor grinding and sparks


Sounds like you have a bad rear armature bearing.
Remove the end cap on the motor and the 2 carbon brushes.
Remove the 4 screws that hold the motor housing to the frame and pull it straight off.
Most often the bearing heats up enough to ruin the rubber boot that sits over the bearing as well as the motor housing itself. Check to ensure the armature is not burnt

22119051-wvjv2ek3boqiwefmtj30yfqx-1-0.jpg If the armature is OK and it is just a bearing you can replace it in place with a standard bearing puller

22119051-wvjv2ek3boqiwefmtj30yfqx-1-1.jpg Make sure to replace the brushes as well when you do this repair.

Dec 10, 2013 | Bosch 4000 - 07 Electric Table Saws

1 Answer

Heat makes a screaming sound - only comes on when on high, air does not come on at all - A little advice and help needed. THANKS


The screaming sound is the blower motor bearing. the fan speed switch controls the grounding side of fan motor once on high it grounds the high speed fan relay. so lower speeds goes through blower motor resistor. this may be burnt out do to bearing is screaming tight to shaft creating a larger ampere draw that burnt it out.

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1 Answer

Unit has hard time starting, need to turn wheel, only runs at slow speed


you have a problem with the bearings or the motor/brushes are burnt. Does this tool arc when running. If so I would check the brushes first, unplug the tool and remove them and while they are out rotate the motor slowly and look at the commutator bars for excessive discoloration or unusual wear.

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2 Answers

Hi it seems like their is no power but their is, the motor is very hard to turn by hand? I'm assuming the bearings are gone. what do you think any history on these similar problems


bearings in a table saw are always a problem, but the replacement cost is cheaper than a new saw, but also if you have possibly overloaded or tried cutting with a dull blade the electrical system might be out. I would think the bearings first though.

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3 Answers

Failed electric motor on 10" Craftsman Table Saw


by seized is it burnt up or are the bearings just bad, the bearings are minimal but the field/armature would be more. Give me the model number and I will try and find a breakdown and let me know what we are looking for and I will try and help.

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2 Answers

Bosch 4000 table saw won't work


OK sounds like you are handy. You have electric to the brush tubes? (first unplug saw to test) If yes then I would remove the brushes to see if they were making contact with the commutator. Does the blade spin freely? If not you might have a bearing problem. I would again use air after removing the brushes and then reinsert making sure they seat on the armature. If still nothing then if you are comfortable I would pull the motor housing. But before pulling go to Bosch Tools website and downloading a breakdown of your saw. Let me know if I can help

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4 Answers

Carbon brush sparking and cause no power for electric motor


You have either one of 2 problems. Either you have a brush that is hung up and burnt or the armature is bad. If you are comfortable in removing the brushes first unplug the tool and remove the brush caps. Pull brushes out and look at the spring making sure not collapsed and then the end of brush that rides on armature for a burning look. Then I would look into brush tube and try and turn by hand the roller to look at the segments of armature best you can. If this needs anything other than brushes I would take it to a repair shop. Good luck
Dave

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