m600 charging system questions

[stevet]

I have an m600 with the "under the flywheel" alternator. My model has the diode assembly with what I believe is the voltage regulator on it mounted to the cooling shroud of the wisconsin vf4d. Problem is the charging system is only putting out about 6 volts. It's either a 6 volt system or I have a problem. If it's the voltage regulator can I replace it with an after market unit ? My thought is, the generating coil works, the diodes convert the AC to DC, all I need is a regulator to control the voltage. I would rather not update to the 610 style auto alternator. To much work. Any ideas ? Thanks Steve

 

[sledesigns]

I fiddled with the stock system on my M600 and after not paying attention to the random lack of charge on the meter, I had to randomly jump start it. After a few months of cobbling onto the old rat nest of seperate voltage regulator, I decided the stock system was too much work. Took out the old multiwire....24 amp? system. Popped a standard Chevy 2 wire 80amp alternator in there. Had to make a longer belt tensioner, that was about it. Now it works every time, less clutter, and can run a bunch of halogens (that I haven't had time to mount up yet) I'll take a pic if you want. Good luck whichever way you go. -Scott

 

[OldMachinist]

I don't have specific info on the Wisconsin charging system but typical systems with stator under the flywheel can be tested this way.
Find the two wires that come from the stator and hook a voltmeter set on a low AC scale. Run the engine at full governed speed and read the voltage. It should be somewhere around 28 or higher. If its low check the resistance across the stator leads with engine stopped. If it's infinity ohms the stator is open(bad) or a lead has broke off. Next check each stator leads resistance to ground, the reading should be infinity. If resistance or continuity is measured the lead is shorted to ground.

 

[stevet]

I don't have specific info on the Wisconsin charging system but typical systems with stator under the flywheel can be tested this way.
Find the two wires that come from the stator and hook a voltmeter set on a low AC scale. Run the engine at full governed speed and read the voltage. It should be somewhere around 28 or higher. If its low check the resistance across the stator leads with engine stopped. If it's infinity ohms the stator is open(bad) or a lead has broke off. Next check each stator leads resistance to ground, the reading should be infinity. If resistance or continuity is measured the lead is shorted to ground.

After a lot of testing and research I think I've narrowed it down to the voltage regulator. This is the 2nd time I've had trouble with this system and I see why they switched to the auto alternator in the 610. I went to my local dealer and all the brackets and hardware that I need is unavailable. I'm going to have to make my own mounting hardware so if you wouldn't mind, the pictures would be very helpful. I'll also need some info. What is the diameter of the alternator pulley and what is the diameter of the drive pulley? Thanks in advance. Steve

 

[sledesigns]

After a lot of testing and research I think I've narrowed it down to the voltage regulator. This is the 2nd time I've had trouble with this system and I see why they switched to the auto alternator in the 610. I went to my local dealer and all the brackets and hardware that I need is unavailable. I'm going to have to make my own mounting hardware so if you wouldn't mind, the pictures would be very helpful. I'll also need some info. What is the diameter of the alternator pulley and what is the diameter of the drive pulley? Thanks in advance. Steve

I looked and guess I made a custom bracket. I just found the cad drawings of it. I haven't found the program to verify that was the one I made. Sorry I couldn't get a picture yet, been working from dark in the morning till dark at night. I do remember that I'd used a serpentine belt drive alt, but the pulley popped right off and the stock M600 one went right on. Neat part of the M600 variable speed drive, when you bump up the varible speed you can get full alternator charging power at engine idle. -Scott

 

[sledesigns]

I looked and guess I made a custom bracket. I just found the cad drawings of it. I haven't found the program to verify that was the one I made. Sorry I couldn't get a picture yet, been working from dark in the morning till dark at night. I do remember that I'd used a serpentine belt drive alt, but the pulley popped right off and the stock M600 one went right on. Neat part of the M600 variable speed drive, when you bump up the varible speed you can get full alternator charging power at engine idle. -Scott

Heres an Autocad Inventor .bmp of the aluminum bracket I milled to put a GM 3 wire alternator on my M600. The real one is mildly visible in the machine. Been a bit busy until now & so has the GM alt, recharging after cold cold starts

 

[chuckcnm]

Heres an Autocad Inventor .bmp of the aluminum bracket I milled to put a GM 3 wire alternator on my M600. The real one is mildly visible in the machine. Been a bit busy until now & so has the GM alt, recharging after cold cold starts

would you have any pics on how this is mounted on the engine, I have some issues with may charging system and wanted to see how hard it was to convert it. I have a bobcat 630