[diesel_mercedes] Charging Voltage, What do you get?

 



Therein is why I insist on only BOSCH regulators ~ none of the other brands (I tried a lot of different ones) ever charged more than 13.5 VDC .

The system is designed for 14 V. but unless nothing else is using current, it's rare to reach that actual voltage .

Cleaning the 35 + year old grounds is time consuming but helps a great deal as does adding secondary grounds .

-Nate
        Rob  wrote :

I see why this Alternator was on sale for $80, as it's a 'return', sold as new/rebuilt, where someone took out the Bosch voltage regulator and replaced it with some unknown, home repaired brush, regulator. WTF. Regular price is $147 on Amazon.

Being that I wasn't going to swap out today, and the old one was out of the car, I brought the old one to the FLAP to check, and the old Alternator tested fine, 14+volts on there machine. I decided to check/clean all the connections & grounding areas.

After 1st cleaning all connections and grounding areas, I got Idle 12.7v, tops 13.67v.

I charged the battery all the way, and got some better numbers: idle 13.9v, tops, 14.0v

It drops with the headlights & fan running: Idle 12.58v, tops 13.7v.

What voltage are these MBs supposed to get? What do you get?

Thanks

Rob

'85 300D


 

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