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Homelite Generator 4400-shorted stator????

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supergrumpy

11-08-2007 08:03:26

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rainy day project, got a 1992 8hp unit in pieces, slowly putting it back together, hit a major snag

4 big leads come out of the stator, brown/yellow are tied together at plugs along with a ground, red and black look to be the hots

I isolated these 4 leads, all 4 are connected together internally but not shorted to ground

if each leg is independent I should not have any connection between the 2 pairs of leads, cannot find wiring diagram, suspect unit got too hot and one leg shorted to other leg

think I can clip ends off one leg and use other leg as 110 only at 1/2 output

opinions needed, wiring diagram would help too

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Vern-MI

11-08-2007 09:56:13

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Re: Homelite Generator 4400-shorted stator???? in reply to supergrumpy, 11-08-2007 08:03:26

Try this site for info. and diagrams on the Homelite LR4400.

Homelite LR4400 Manual

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supergrumpy

11-08-2007 10:41:26

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Re: Homelite Generator 4400-shorted stator???? in reply to Vern-MI, 11-08-2007 09:56:13

thank you, exactly what I needed

it's as I feared, when I lift one end of the field coils at the circuit breakers and at the other end where they plug into the common, I should not be getting an ohmeter reading between the 2 separate coils

will try getting it to work on one side by lifting the neutral side on one coil

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buickanddeere

11-09-2007 03:11:04

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Re: Homelite Generator 4400-shorted stator???? in reply to supergrumpy, 11-08-2007 10:41:26

Don't panic yet. The two winding may share the same neutral point. I assume this gen set has two lines and a neutral for 120/240. And a separate line to neutral to energize the rotor? There are a couple of different control boxes. One is just a dumb rectifier/control with the zener in it to limit max excitation and therefore max voltage on the stator's 120/240 circuits. The other control box regulator is intellegent using feedback from the 120/240 circuits to vary the excitation levels and keep the output voltage very stable. I thought I was going to be clever and update my Homelite from the dumb regulator to the smart regulator. Carefull study of the parts book showed every identical part number for everything between the dumb & regulated 5500W gen sets. With the exception of the smart regultor. So with a smile thinking I was adding a $140.00 smart regultor and ending up with the identical smart generator that cost $400.00 more..... I tried for days and could never get that &^$#$^&%^ smart regultor to work. Output voltage was always too low. I tried the same new smart regulator board in my old Generac 4000XL which also has a smart regulator. It works fine there. So I'm ticked at having a new unused $140.00 regulator board in my parts pile.

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supergrumpy

11-09-2007 06:04:45

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Re: Homelite Generator 4400-shorted stator???? in reply to buickanddeere, 11-09-2007 03:11:04

my unit is very simple, definitely separate output coils with 4 power leads on stator, red+black are hots, brown+white go to same terminal on the 120v receptacle, wiring diagram says they do not share common neutral internally

maybe you already tried this on your set up but,

if you can isolate the feedback point, you could add rheostat to increase resistance in feedback circuit, regulator should increase output to bring output back up, basically fool the regulator into upping the output voltage

link in one of the replys above gives info on melting pot material to get at circuit board, good rainy day project

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buickanddeere

11-09-2007 18:31:36

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Re: Homelite Generator 4400-shorted stator???? in reply to supergrumpy, 11-09-2007 06:04:45

Voltage on the stator won't exceed 95V. Even when the regulator board reference voltage is dropped to near zero. Which forces the board into max output. I did check the wiring diagram very carefully. The old board from the 4000XL which works 100% on the 4000XL. The 4000xl's board has the same 95V output when transplanted into this new 5500W Homelite. Engine rpm is set for 62.5Hz no load. I can't figure it out. The regulated and unregulated 5500W Homelites use the exact same stator & rotor? Just the regulator/rectifier boards are different? Yet the generator works fine with 125V no load using the simple rectifier board?

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CH (upstate, NY)

11-08-2007 09:23:40

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Re: Homelite Generator 4400-shorted stator???? in reply to supergrumpy, 11-08-2007 08:03:26

Don't know about your case but the usual cause for no output is the electronic voltage regulator. That's the black epoxy modual. They cost about 150 bucks.

I asked Homelite for the schematic for it but they said no.

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