Question about Electric Demolition Jackhammer
It has orange& gray case. The motor slowed down and started smoking. I check the brushs,they are 3/4in.long. I clean motor with electric motor clearner, made no differants.
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: I have an Atco Regent
The generator makes the particular rotary cutting blades spin so that you can cut turf. Sometimes the particular cut grass penetrates the generator shaft and will either temperature it up to standstill or perhaps clog the particular motor. The motor needs to be checked for almost any foreign things, the armature needs to be rotated to find out if that moves openly.
A smoking rectifier is not good, it will need to be replaced.
The rectifier is required to switch AC (wall power) to unregulated DC.The brushes are the power input to the motor, with the slowing,the brushes are shorted to provide a dynamic break which quickly stops the blades. You will need to test the motor to see if that caused the rectifier to go.
I am not sure what the specs would be for resistance but it should be in the 10 ohm range for a 12 amp motor (120 volts/12 amps=10 ohms)
Posted on Apr 26, 2011
SOURCE: My craftsman 12 amp 18"
If the brushes are really short, that could be a lot of the loss of power if they are not making good contact with the commutator. If you can not find your model number, see if you can locate an identical one or one of the same motor. You may have to try going into Sears to see if there is one on the sales floor and get the model number off that one.
Posted on Aug 24, 2011
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