Question about Coleman Powermate Premium Plus 6250W Portable Generator

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My generator is not producing any power how do I go by exciting the brushes

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Simple way is to use a small battery charger (1 or 2 amp) and momentarily contact brushes (very quick swipe). You must watch polarity. Check your manual; generally the positive brush is the one closest to the bearing. Oftentimes problem is brushes have worn and are not contacting rings. Examine commutator rings for smooth surface. Remove diode board and check for leaking capacitor. If it is split open, burned or swollen replace as needed. Good luck

Posted on Sep 03, 2010

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Disconnect the rotor field wires at the AVR or on the exciter/brushes. Note they are polaroty sensitive. Connect a 12V battery to F+ and F- (note polarity) and momentarilly power from the battery for a few seconds. DO NOT forget to disconnect the rotor/exciter field wires first or the voltage regulator will be damaged.

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Disconnect the rotor field wires at the AVR or on the exciter/brushes. Note they are polaroty sensitive. Connect a 12V battery to F+ and F- (note polarity) and momentarilly power from the battery for a few seconds. DO NOT forget to disconnect the rotor/exciter field wires first or the voltage regulator will be damaged.

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most generators you can polarize the brushs this is done by using a 12v. battery and a set of jumper cables hook to the battery and touch the brushs with the other ends it doesn't matter whicht side, but before you do all that check the connections at the brushs and see if they are loose or not making a good contact, i do hope that i was able to help you, thank you.

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  1. Check for any blown fuse and replace. It can be traced directly from the output lines.
  2. Check field excitation. The field excitation is supplied by the battery to the excitation coil through a pair of carbon brushes. If the brushes are worn out, no excitation field is supplied and no output is generated. Replace carbon brush if found worn-out.
  3. Use an analog multitester to check the continuity of the carbon brush and the field coil.

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