Check the alternator while the engine is running and up through the rpm range. See if it moves.
Mounting bushings can wear out and cause the belt to go tight, then loose. Bushings are an east
fix, the usual parts suppliers have these.
From: diesel_mercedes@yahoogroups.com [mailto:diesel_mercedes@yahoogroups.com]
Sent: Sunday, August 30, 2015 7:36 AM
To: diesel_mercedes@yahoogroups.com
Subject: RE: [diesel_mercedes] Charging problems
Maybe a loose alternator belt?
If there are no other problems, I’d wait for something else electrical to crop up.
On the old, pre-1970’s VW’s the red light would glow slightly at night but it usually went no further than that.
Bill in Oregon
From: diesel_mercedes@yahoogroups.com [mailto:diesel_mercedes@yahoogroups.com]
Sent: Sunday, August 30, 2015 7:26 AM
To: diesel_mercedes@yahoogroups.com
Subject: Re: [diesel_mercedes] Charging problems
No problem with lights and AC off. The voltage regulator is internal and will be changed this week. Voltage is OK with engine running. No alternator or battery problems are showing on the plug in meter set. The car at this point is a couple hundred miles away so further diagnosis by me is difficult. But any suggestions can be checked and implemented.
Thanks for your interest.
=================================================
On Sun, Aug 30, 2015 at 9:39 AM, 'Atwood,Warren' Warren.Atwood@altramotion.com [diesel_mercedes] <diesel_mercedes@yahoogroups.com> wrote:
Without the headlights and AC do you have the same issue? Are the alternators internally or externally
regulated on these? I do not know. What is the battery voltage at idle and bring it up to 2000 rpm? Should be around 14.1 volts
at idle and 2000 rpm.
From: diesel_mercedes@yahoogroups.com [mailto:diesel_mercedes@yahoogroups.com]
Sent: Saturday, August 29, 2015 11:38 AM
To: diesel_mercedes@yahoogroups.com
Subject: [diesel_mercedes] Charging problems
We've developed an interesting problem on our 560SEL another 126 with a similar layout. While driving with the headlights or AC on at approx 50mph the red warning light on the dash sttatring glowin. The strange thing is the brightness increased as the engine speed increased. I tried one of the plug in testers and it showed normal batter condition and the alternator operating properly. I checked the battery connections and verified the water level in the battery. I haven' checked the terminal block on the fender or the engine grounds yet. Is there anything else we should check?
--
Al Boucher
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--
Al Boucher
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This communication and any attachments are intended only for the personal and confidential use of the recipient(s) named above. If you are not an intended recipient or an agent responsible for delivering it to an intended recipient, you are hereby notified that any disclosure, copying, distribution or use of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by return e-mail, and delete the original communication from your system without making any copies.
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Posted by: "Atwood,Warren" <Warren.Atwood@altramotion.com>
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