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#1
01-13-2012, 07:59 AM
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what is the typical lifespan of a alternator voltage regulator?
It seems to me that it would be prudent to keep one in the glovebox. Mine failed this weekend without much of a warning. It would have sucked if I was away from home and had to get a tow.
__________________
Ben 1987 190d 2.5Turbo 
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#2
01-13-2012, 08:22 AM
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The brush life seems to be around 100K miles.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#3
01-13-2012, 10:56 AM
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I've typically seen longer than 100K service life of the brush pack/regulator assembly.
For me its been more like 150-200K. When you replace the brush pack take a good look at the armature, if it has a noticeable grooves and the surface appears to be rough its almost mandatory to clean up the armature in a lathe. If you don't do this I've found the new brush pack will be worn out in 30-50K miles since the new brushes will be pushed into the armature with more force than the old assembly (new springs and more compressed in the new brush assembly) and they subsequently wear out rapidly. If the armature is cleaned-up you can expect another 150-200K but at that point the bearings are usually a bit gritty to say the least.
__________________
98 Dodge-Cummins pickup (123k) 13 GLK250 (135k) 06 E320CDI (323K) 16 C300 (62K) 82 300GD Gelaendewagen (54K)
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#4
01-13-2012, 02:06 PM
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Most would just put in a regulator even though it's just that the brushes are worn out. The brushes can be replaced seperately if you want.
__________________
Click here to see a photo album of my '62 Sprite Project Moneypit (Now Sold)
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#5
01-13-2012, 03:17 PM
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In my 210 the regulator died at about 70K miles. The brushes still had about half their life.
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#6
01-13-2012, 07:39 PM
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That's unusual, usually the brushes are worn down to nubs.
__________________
Click here to see a photo album of my '62 Sprite Project Moneypit (Now Sold)
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