Question about Coleman Powermate Powermate 5000W Generator

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Pm0418000does not charge. the muffler has a hole toward the generator and it probably overheated the field poles.the black box unit in the back of the generator has a burst what it looks like a turn signal flasher. the unit runs great and it recharges the battery, but no output. please help. thank you.

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That "Turn Signal Flasher", sounds to me, suspiciously like a Capacitor, especially if it has "Blown" I think your "Black Box" has taken a hit & is stopping the output. I would think replacement is your only option.. well unless you can replace the parts and fix it?

Posted on Feb 03, 2010

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Posted on Jan 02, 2017

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I put my wolf 800 generator away working and it now runs ok but will not generate. I have tested the 4 leads at the plug and there are no breaks. The reset switch is ok. could it be the sealed black box...


Hi and welcome to FixYa, I am Kelly.
Test the capacitor. This is an inverter type generator and the armature / rotor is an induction field with a varistor across the armature. They work via magnetics generated by the rotor. That initial AC voltage goes thorough a capacitor and diode to make DC to increase the field strength to reach the final output voltage.

The capacitor needs to be checked (usually has yellow wires) as does the diode pack. Flashing the field in an inverter type generator is usually NOT successful as there are no brushes to the armature / rotor. Isolate the capacitor by removing ONE set of leads off of ONE side. Then set your meter to R x 10K and probe the terminals. You should see a momentary jump and then it goes toward infinity. Reversing the leads each time you probe the capacitor should yield the same jump and drift toward infinity. No Jump = bad cap.

Also look for a micro- circuit breaker in the control panel area. If your unit has the micro breaker you will usually see a tiny orange plunger sticking out about 1/8" Press it back in and test the unit. If it stays reset great. If it pops right away.. there is a short in the capacitor or to and or from the capacitor.

The diode pack can have 3 or 4 wires on it. One wire being common to all of the other wires with meter leads in one polarity. Reversing the test leads across the diode it will read open.

The wires from the capacitor when removed should read resistance to each other. NO resistance - bad stator or broken wires! :( The yellow wires / 2 capacitor wires usually have some male / female round plug in connections. Make sure the connections do not appear that they have been HOT. If you note the connections have been hot try cleaning the terminals first. Most of the time the only option is to cut out the connector and splice the wires.

IF the stator winding checks out good as does the capacitor and doide pack the most probable suspect will be the varistor of the armature / rotor. (
Thanks for choosing FixYa,
Kelly

Apr 08, 2011 | Electrical Supplies

1 Answer

Coleman powermate generator has no output. have changed diodes, capacitor and brushes. i have 12 volts across the brushes but no output at the receptacles. coleman powermate 0545005 5000w


Disconnect the leads going to the brushes, and check for continuity (resistance) of the field winding. You should be able to measure *something* on the order of a few ohms. If you have resistance, then check each brush contact to the shaft that the field winding is on. There should not be any resistance at all, if there is, you have a shorted field winding and will need to be replaced.

Check the resistance of the stator winding next, make sure that nothing is connected to the generator, disconnect the stator wires if you are able (label them!). Check for resistance between the leads (2 wires for a 2 pole, 4 wires for a 4 pole). If there is no resistance, then the stator is open, and will need to be replaced. Also check for resistance from each wire to the frame of the alternator, there should not be any resistance here (indicating a shorted stator). If there is, then you have a shorted stator, and will need to have it replaced.

Replacement is likely to be impractical, probably cheaper to buy another generator with the same engine and keep the old engine as a spare. Still, contact an automotive starter / alternator shop for prices.

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How to change the alternator on my 2000 grand voagear


This is for a 3.3L motor
Hope this helps, it it does please leave feedback and vote Thank You and Good Luck

REMOVAL

  1. Release hood latch and open hood.
Removal/Installation of Battery Cables 81929864

  1. Disconnect battery negative cable.
  2. Remove windshield wiper housing, refer to the Windshield Wipers and Washers for proper procedures.
  3. Remove accessory drive belt.
Generator Mounting Bracket 81929870

  1. Remove bolt holding top of generator mount bracket to engine air intake plenum.
  2. Remove bolts holding outside of generator mount bracket to generator mount plate.
  3. Remove bolt holding top of generator to mount bracket.
  4. Remove generator mount bracket from vehicle.
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Generator 81929868

  1. Disconnect the push-in field wire connector . from back of generator.
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Generator Pivot Bolt 81929871

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Generator 81929872

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INSTALLATION

  1. Place generator in position on vehicle.
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  3. Place B+ terminal in position on generator.
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  5. Connect the push-in field wire connector into back of generator.
  6. Rotate generator forward away from dash panel.
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  9. Install bolts to hold outside of generator mount bracket to generator mount plate.
  10. Install bolt to hold top of generator mount bracket to engine air intake plenum.
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Probably around 76to 78db if I were to guess . Its not alway best to be adding extra mufflers to these engines that were designed with the one they have . Adding mufflers change back pressures and temps on exhaust and effect the performance. Very nice generators. Hope this helps.....

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Porter Cable Generator does not produce electricity


Here are a a few possibilities to look at:

1) Bad connection at the outlets themselves (loose wire) regarding neutral, hot wires.

2) Bad Excitation Capacitor. The Exc. Cap. is responsible for energizing the field wiring of the alternator. If the field is not energized, there will not be a magnetic field developed, therefore, no electrical output.

3) Open Field / Stator winding. If Field winding is open, no magnetic field will be developed. If Stator winding is open, no voltage will be induced.

4) Generator speed is too slow. If the RPMs of the engine are too slow, the output of the alternator will fail as well. Note that from normal speed, voltage output will occur but at reducing frequency until ouput ceases altogether, usually at about 47Hz. If your alternator is a 2 pole, engine speed should be 3600 rpm nominal. If alternator is a 4 pole (most aren't), engine speed would need to be about 1800 rpm nominal.

5) Generator speed too fast. If RPMs are too fast, output may fail as well. See above.

6) Excitation Fuse has blown. There is sometimes a fuse in the excitation circuit. To check this, you will likely need to pull the end housing off the alternator. Pay attention to bearings / bushings.

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1 Answer

Does not generate electric power at 110V or 220V.


To flash fields the genset has to have rings and brushes. The ring towards the bearing or towards you is positive and the back ring is negative. The rings and brushes are on the rotor, which is the part that spins on the generator end. Place a volt meter on the outlet, start the genset, with a 12V battery apply the positive to the front ring and the negative to the back ring. The voltage should climb up to about 50 - 100Volts or more. If this happens then you will need a Voltage regulator. If voltage does not climb up, then check the rings and brushes. Make sure the brushes have a good length and that they touch the rings and make sure the rings have a shiny copper color to them, if they're black clean them with emory cloth until there is a nice copper color and try flashing the gen again. If nothing happens then you need a new generator end or new generator, which ever you prefer. Make sure to use rubber gloves when flashing and look out for rotating parts.

May 18, 2009 | Coleman Electrical Supplies

1 Answer

Flash field on generator


Yes, polarity does matter. If you remove the front cover on the generator end you will see where the rings and brushes are located. The closest to you is positive and the ring that is towards the engine is negative. Trace those wires up into the control box and flash the genset there. The six volt battery is fine. I preferr 9 or 12 volt battery, so that I can produce a larger AC voltage.

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No charge


You'll need to test to see if you are getting voltage from the brushes. This is a live test so, using something like alligator clips or such on the metal bracket of the brushes for your volt meter is a good idea. Simply start your generator with the volt meter leads attached to the the brush holders or exposed electrical connection to the brushes and see if they are producing electricity (120vac or greater). No voltage then it's your brushes, field, or stator. If they are good check the output of the voltage regulator. If it to does not kick down any voltage above 120 then it's your problem.

Note most cheap generators do not have a voltage regulator. All generators depend on the correct engine rpm to achieve normal voltage. 3600 rpm is the correct speed on a two pole generator to produce 110 to 125vac and 60hz (normally found on gas generators). 1800 rpm is the correct speed for four pole generators (normally found on diesel generators). You may set your rpms slightly higher to ensure that it's maintained underload ie 3750 for gas. Diesels usually have very good governors and don't need to be set higher.

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