Question about Electrical Supplies

Open Question

How do you check brushes on Generac Centurion 3250 generator

Check brush terminals with volt meter without the AVR connected. Shows only 53 volts

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 1383 Answers

SOURCE: i get no 110 or 220 volt power

generac was purchased by Briggs Stratton some years ago, however some information is available at the following web address, just enter your model number:

http://www.generac-portables.com/service_support/owner_manuals/owner_manuals.cfm

The small board that you describe is the bridge rectifier that converts ac from the windings to dc for the armature. You can test the brush/board by removing the part from the generator and applying 12 to 16 volts ac to the input tabs/wires then test/read dc (dc voltage will be lower than input ) voltage at the brushes. Use meter to make sure that you are getting dc. I use a small power supply less than one amp that I purchased at the thrift store for a couple of dollars. If test fails replace part. If it tests ok re-install brushes and re-connect the ac power supply to brush/board which in turn will energize the armature. At this point test the armatrue for magnetic power. I use a thin welding rod or wire against armature. If you feel a magnet start the engine. If the windings are good you should get some voltage at the plugs and the two wires that feed the brushes (will not be full voltage). If voltage is present, kill engine and disconnect ac power supply and connect the original wires to brushes/board and start engine. If you now have voltage at plugs you spiked the system indirectly by energising the armature. If still no voltage you may have an open circuit that feeds the brushes or diode pack is failing with the incresased voltage. Good luck with your repair and email if you have questions.

Posted on Apr 14, 2009

mamicheddy
  • 79 Answers

SOURCE: i get no power 110 or 220v from my generac 5000

The best thing to do at this point is to flash the fields. You do this by applying battery voltage (12Vdc) or 6Vdc to the wire that come from the brushes. The brush closest to the bearing is Positive and the brush near the rotor winding is Negative. While the generator is running apply battery voltage to the correct spots on the brushes. You should see an increase in voltage. If you do see an increase, then you will need that little board with diodes, that is your voltage regulator. Use rubber gloves when performing this procedure and stay away from rotating parts.

Posted on May 08, 2009

protek480
  • 1714 Answers

SOURCE: My Generator is putting out voltage on both the

Check the voltage with a meter in all the recepticles with your meter leads in the left and right slots on the plugs. Is that 184 volts AC there? If so, your gen has big problems with the voltage regulator. Let me know what you read. You can check the right slot of each plug to the round ground hole on the plug too, should be 120 volts there.

Posted on Jul 02, 2009

stunt driver
  • 5 Answers

SOURCE: Checked capacitor, diodes and circuit breakers and

Make sure it is not the brush set.
There must be continuity from one slip ring to another.
If not, but rotor doesn't look burnt - check points where rotor wire is soldered to slip rings, or clear contact point on each side of wire and check continuity there, past slip rings and brushes. Big chance that wire came loose from slip ring.
Had such problem on my Champiion 3500
evern if burnt - rotor is easy to rewind at home, unlike stator.

Unless your model is Inverter type - there is AVR module.
But, unless your rotor has continuity - don't bother going further.

Posted on Jan 13, 2010

  • 185 Answers

SOURCE: A new Generac Centurion 36kW unit is producing 350

Hello, seeing how this is a new generator, I would have the company either replace the unit or have a certified tech (factory) set the voltage. My first check would be that the voltage regulator is not functioning, or is set incorrectly. I have worked on generac for 30 years. My suggestions are because of warranty issues. You might void your warranty if you try to set the voltage. Just curious, when you discovered this, was there a load connected? Also, I would make sure by checking line voltage with my multimeter to verify it is functioning properly. Sometimes a Digital Meter can give false readings. Do not put a load on the generator, I would connect a 100w light bulb to a phase - neutral connection as not to damage household equipment. Please feel free to contact again if there are more questions.
joe

Posted on Jan 15, 2011

Testimonial: "Thanks for the info. Joe, it confirms what I already suspected. I have called in a certified generac technician because of the warranty issue. "

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

GENERATOR WILL RUN BUT DON'T PRODUCE ELECTRIC


Hi and welcome to FixYa, I am Kelly.

Without a model number... I am guessing about what type / brand and MODEL of generator you have. I have to assume it is a Coleman Power mate.

Try flashing the field. Do this.. take and electric drill and plug into the outlets of the generator. Turn on the output power GENERATOR ON. Squeeze the drill trigger and rotate the chuck as fast as you can. This will induce voltage into the stator and they usually will start producing power. When it does produce power it will try to yank the drill chuck head out of your hand so keep that in mind.

If the above does not work...
Remove the small cover from the center of the endbell. It covers the end of the rotor shaft and has 2 brushes under the cover.
INSPECT the brushes visually (do not remove them yet)
(Generator OFF!)
Use a meter to read resistance by probing the electrical contacts of the brushes. You MUST read LOW resistance. This is the rotor winding.
No resistance or high resistance
Remove the brushes inspect for damage. Try to probe the slip rings of the rotor. (You might have to make a 14/2 Romex electiral wire extension to get some solid copper wires to touch the rotor slip rings) Again you must read LOW reistance.

If you have low resistance and the brushes are good.....
Reinstall the brushes. (TEST for AC) Start generator
STILL NO OUTPUT?!!!!
Use a meter on DC to read AVR voltage output to the brushes by probing the brush terminals. You should read 3 - 7 VDC. No voltage.... hmmmm Possibly an AVR problem but...

Try this.
Rig up a 9 Volt battery that you TAPE the wires to the battery terminals and the case of the battery
Just loosely connect the 2 wires to the brushes. Wrap the battery with a rag it might explode if you don't remove it fast enough. Your going to yank this off as soon as it produces power QUICKLY.

Plug in a light or a small fan so you can see that power is being produced. Let it run a few minutes before shutting it down.

To do anything else I need to know your generator model number to do winding and voltage regulator checks.

Thanks for choosing FixYa,
Kelly

Aug 30, 2011 | Coleman Electrical Supplies

1 Answer

A new Generac Centurion 36kW unit is producing 350 volts across phase A & B and 175 volts from each phase to nuetral/ground. I need 120/240 volts.


Hello, seeing how this is a new generator, I would have the company either replace the unit or have a certified tech (factory) set the voltage. My first check would be that the voltage regulator is not functioning, or is set incorrectly. I have worked on generac for 30 years. My suggestions are because of warranty issues. You might void your warranty if you try to set the voltage. Just curious, when you discovered this, was there a load connected? Also, I would make sure by checking line voltage with my multimeter to verify it is functioning properly. Sometimes a Digital Meter can give false readings. Do not put a load on the generator, I would connect a 100w light bulb to a phase - neutral connection as not to damage household equipment. Please feel free to contact again if there are more questions.
joe

Jan 14, 2011 | Electrical Supplies

1 Answer

My Generac Guardian 15,000 Watt Model 004582 generator is putting out low voltage (about 45V on the 120V side). The trouble lights on the voltage regulator are lit as follows: Regulator light - lit red...


Hi Jake and welcome to FixYa. I am Kelly. Check both CB1 and CB 2 circuit breakers by pushing them to OFF and then back ON. Open the brush block access and then start the unit. You should read voltage at the brushes of 5 - 14 VDC on the terminals of the brushes. If you do not have 5 - 14 VDC at the brushes the probable suspect is the automatic voltage regulator (AVR). If you do have the correct voltages then with the unit OFF.... do a resistance check across the armature coil by reading resistance at the brush block terminals. You should read around 180 Ohms. It can be more or less resistance but for sure less than 500 Ohms. If you do NOT get a resistance reading remove the brush block assy and test the armature directly by reading across BOTH slip rings. You should get the resistance previously stated. If you have resistance then most likely there is a problem with the brushes. (Too short / broken carbon brush / missing spring or a defective terminal.) Without knowing the AVR output voltage and the armature resistance reading at this point it is difficult as to how to advise you to proceed. Let me know the values you obtain for AVR DC voltage at the brushes and actual ARMATURE resistance reading. Make sure you use R x 1000 on the meter. I am having thoughts of maybe a broken wire somewhere inside the control panel also.

Thanks for choosing FixYa,
Kelly

Jan 09, 2011 | Generac Guardian 100 Amp Transfer Switch...

1 Answer

Not charging


To test the chargeing system on your bike. First, text the battery. Unless it is "brand new" there is always the posibility that your battery is the problem. This is especially true on an Ironhead Sporty due to the vibration. Take it to an automotive parts store and ask them to load test it.

The first thing we want to do is to "polarize" the generator. Using a jumper wire, MOMENTARILY touch the wire from the "A" terminal to the positive terminal of the battery. Just make it spark, that's all.

Now, with the battery FULLY CHARGED, connect a DVOM (digital volt ohm meter) to the battery. Red meter lead to the positive and black meter lead to the negative. Put the meter's function switch in DC VOLTS, 20 VOLTS or greater scale. Start the engine bring it to a high idle. The meter should read 14.5 to 15.0 volts. If not, test the generator.

First, remove all the wires from both the "A" and the "F" terminals. put your meter's function switch to DC VOLTS, 50 VOLTS or greater. Connect the red meter lead to the "A" terminal and the black meter lead to a good ground. Start the engine and bring the revs up to about 2000 rpm. MOMENTARILY, connect a jumper lead form ground to the "F" terminal of the generator. Your volt meter should read 25-30 volts.

If your generator output is good, you need to replace your regulator. If the output of the generator is zero or low, you need to service the generator. Check the brushes to make sure they're not worn and you may need to recondition the communtator surfaces.

Good luck
steve

Sep 19, 2010 | 1979 Harley Davidson XLH 1000 Sportster

1 Answer

Generac 5250 with a 8 hp Honda engine. Runs fine, no output


Take a resistance reading across the brushes with and Ohm meter. (not running) You should read a low resistance. If you have no resistance across the brushes then then either the brushes are not mating with the armature or the the armature is open.
IF you have resistance then the AVR (Automatic Voltage Regulator) in the endcap has failed. With the engine running and the Brush block disconnected you should have 4 - 12 VDC on the two wires going to the brush block. No voltage = bad AVR.

Thanks for choosing FixYa.

Kelly

Jul 30, 2010 | Electrical Supplies

1 Answer

Generac 5500XL, model#09778-7 no output. Changed the power regulator board. No luck. Flashed the 120 plug with 12-30vdc from DC board. Nothing. Excited the brushes directly with DC board. Only got 2.36VDC...


Double check your brush istallation. positive side toward rotor bearing, if you put 12 vdc directly into brush pack and check with a meter at the 120 vac outlet and have low or no voltage, you may have no resistance in your rotor slip rings, excitor & main windings also need a resistance check. 12.6-16.7 ohms (rotor) 2.26-2.80 ohms (excitation) .26-.32/.28-.35 main or power windings. Note: unit running when appling 12 volts to brush pack. 2-5 second only, ( This test tells you the rotor & stotor are ok )

Jan 22, 2010 | Coleman Powermate 5000W Home Backup...

2 Answers

My Coleman Powermate 6250 generator has no power output. After the carburator was cleaned, I flashed it. A voltage meter shows there is power being generated, but none so to light a light bulb. What to do...


Take the cover off and flash the rotor again with a 12 volt battery. Positive lead goes to the top or right side brush. Negative to the other brush. Just touch it on, then remove it, and check for power at plugs.
If that doesn't do it, change the AVR (voltage regulator)

Aug 05, 2009 | Coleman Powermate Premium Plus 6250W...

1 Answer

I get no 110 or 220 volt power


generac was purchased by Briggs Stratton some years ago, however some information is available at the following web address, just enter your model number:

http://www.generac-portables.com/service_support/owner_manuals/owner_manuals.cfm

The small board that you describe is the bridge rectifier that converts ac from the windings to dc for the armature. You can test the brush/board by removing the part from the generator and applying 12 to 16 volts ac to the input tabs/wires then test/read dc (dc voltage will be lower than input ) voltage at the brushes. Use meter to make sure that you are getting dc. I use a small power supply less than one amp that I purchased at the thrift store for a couple of dollars. If test fails replace part. If it tests ok re-install brushes and re-connect the ac power supply to brush/board which in turn will energize the armature. At this point test the armatrue for magnetic power. I use a thin welding rod or wire against armature. If you feel a magnet start the engine. If the windings are good you should get some voltage at the plugs and the two wires that feed the brushes (will not be full voltage). If voltage is present, kill engine and disconnect ac power supply and connect the original wires to brushes/board and start engine. If you now have voltage at plugs you spiked the system indirectly by energising the armature. If still no voltage you may have an open circuit that feeds the brushes or diode pack is failing with the incresased voltage. Good luck with your repair and email if you have questions.

Apr 12, 2009 | Electrical Supplies

1 Answer

Runs great but will not produce electricity


To flash the excitor circuit on a coleman ( the generator is built by generac) you need a 12 volt battery. You quickly apply 12 volts via your 120vac recepticals. NO MORE THAN ONE OR TWO SECONDS! Then check you ac voltage. Most of the time the brushes are burnt up when voltage is low. Check the brushes first. You can access them by taking the end cap off of the generator via two to four screws. The brush holder is easy to spot, two wires leading to the front of the amature. Hope this solves your problem.

Mar 29, 2009 | Coleman Powermate Premium Plus 6250W...

Not finding what you are looking for?
Electrical Supplies Logo

Related Topics:

29 people viewed this question

Ask a Question

Usually answered in minutes!

Top Electrical Supplies Experts

Steve

Level 3 Expert

3287 Answers

Gene Haynes

Level 3 Expert

5089 Answers

Brad Brown

Level 3 Expert

15441 Answers

Are you an Electrical Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...