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  #1  
Old 10-08-2004, 10:01 PM
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Vacuum Diagrams

Here are some vacuum diagrams to help you diagnose your W123, W124 or W126 diesels. The 240D diagrams were looked up for a 83 year model, but should be pretty much the same for 82-85. I've also added some wiring and flow diagrams. Also note that there are year to year (and sometimes, throughout the year) changes and these diagrams may not reflect everything exactly as on your model.

'86-'87 300 SDL, '87 300D vacuum diagram


Cruise Control Repair Articles
http://www.peachparts.com/shopforum/diesel-discussion/123036-cruise-control-repair-articles.html#post883130

Diesel Vacuum system adjustments
http://www.mercedesdismantlers.com/diesel_vacuum_system

722.3 and 722.416 transmission adjustments
http://www.mercedesdismantlers.com//722.3and722.416_transmission_adjustments.html

722.118 Transmission Adjustments
http://www.mercedesdismantlers.com//722.118_transmission_adjustments.html

Diagrams for W124.128 with OM602.962.
http://www.peachparts.com/shopforum/groups/w124-300d-2-5-turbo-pictures.html

OM603 Vacuum & EDS Diagram
OM603 Vacuum & EDS Diagram


Edit:http://www.peterschmidtransmission.com/vacuum.htm also has a good deal of vacuum diagrams available.
http://peterschmidtransmission.com/mb_files/vacuum_schematics.asp
Vacuum Control Valve Test:
http://peterschmidtransmission.com/mb_files/vacuum_test.asp


1985 Mercedes Benz 300SD ACC Vacuum Diagram
http://autorepair.about.com/library/images/bl929lib.htm

(W123) Fixed vacuum leak, now tranny flares
http://www.mbca.org/forum/fixed-vacuum-leak-now-tranny-flares

Last edited by whunter; 09-24-2012 at 10:41 AM. Reason: dead links
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  #2  
Old 10-09-2004, 05:31 AM
Tangent
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Thumbs up

Thanks

Last edited by Tangent; 10-10-2004 at 02:52 AM.
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  #3  
Old 10-09-2004, 08:01 AM
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In reviewing the diagrams for the '85, it is apparent that this vehicle has a vacuum system that differs significantly from the '84 300SD. The changeover valve on the valve cover is controlling the transmission modulation again, something that the '84 does not have.

There is also a "cam plate" with a "valve" attached in the aforementioned diagrams. The '84 does not have this arrangement.

Just a word of caution. The vacuum systems did change frequently throughout the years. The '85 probably has the most changes of them all.
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  #4  
Old 11-08-2004, 07:14 PM
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Edited to add 82 300D vacuum diagram and a few other things.

Edited to add a couple more diagrams and a link to Installing the Fast Start Glowplug kit (changing over from loop-style to pencil-style glowplugs).

Edited to add a couple more items including the injector parts breakdown.
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Last edited by phantoms; 11-23-2004 at 08:25 PM.
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  #5  
Old 12-13-2004, 08:36 PM
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Excellent information here. I've been dissecting my 240 and 300 for about a year now and going through all the long forgotten maintenance items that were neglected before I acquired the girls. Tho I kept them on the road, my weekends and these winters allow lots of time to bond and restore to a couple of nice looking and driving cars.

82 240d Suzy(wifes)
82 300dt Lizzy(Help my daughter is starting to like her)
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  #6  
Old 12-22-2004, 09:21 AM
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Phantoms,

This is great info and should be put in the DIY sticky for future reference. Thanks for taking the time to do this.

Tom
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  #7  
Old 12-22-2004, 11:59 AM
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Thanks, I'll use these for reference, but I have an 1980 300sd... the 116... will some of these apply to mine?

Thanks again,

Les
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Where a calculator on the ENIAC is equipped with 18,000 vacuum tubes and weighs 30 tons, computers in the future may have only 1,000 vacuum tubes and weigh only 1.5 tons. - Popular Mechanics, 1949
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Old 12-22-2004, 08:28 PM
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Quote:
Originally Posted by ytr1903
Phantoms,

This is great info and should be put in the DIY sticky for future reference. Thanks for taking the time to do this.

Tom
I vote for a sticky also, if it has not been done already
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  #9  
Old 12-22-2004, 11:03 PM
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Quote:
Originally Posted by admanles
Thanks, I'll use these for reference, but I have an 1980 300sd... the 116... will some of these apply to mine?

Thanks again,

Les
Found a 80 300SD diagram for you at http://www.peterschmid.com/vacuum/1980/617_950.jpg.
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  #10  
Old 12-23-2004, 12:55 PM
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Thanks Phantoms!

Les
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1980 300sd - Ivory, Tobacco Interior 130,000 miles
2003 Expedition

Where a calculator on the ENIAC is equipped with 18,000 vacuum tubes and weighs 30 tons, computers in the future may have only 1,000 vacuum tubes and weigh only 1.5 tons. - Popular Mechanics, 1949
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  #11  
Old 12-29-2004, 11:53 AM
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Smile Thanks

I just had a chance to look over the diagrams you posted. Amazing info. I have had my 83 300SD for about a month now and in looking for info on it I find this site and the people extremly helpful. I thank you all.
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  #12  
Old 01-09-2005, 01:30 AM
mattdave
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Thanks

Thank you that was helpfull.
Dave S
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  #13  
Old 01-31-2005, 09:53 AM
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In hopes of having all this stuff on one site I merged most of this into the vacuum section of our DIY pages, there is another page for the fuel related stuff. http://207.210.95.34/~boostd/Vacuum/
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  #14  
Old 02-04-2005, 11:53 PM
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Talking Hmmm

If I had a plotter, these would be my new wall covering. LOL

EDIT:
Vacuum Devices, '85 300D-T
http://www.peachparts.com/shopforum/diesel-discussion/166098-vacuum-devices-85-300d-t.html#post1291383

Another engine wont shut off problem.
http://www.peachparts.com/shopforum/diesel-discussion/167360-another-engine-wont-shut-off-problem.html#post1302538
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Last edited by whunter; 10-20-2006 at 11:55 AM.
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  #15  
Old 02-05-2005, 11:30 AM
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Quote:
Originally Posted by whunter
If I had a plotter, these would be my new wall covering. LOL
I believe Kinkos has plotters that you can use, I shall take a look next time I am there. Hum, a room covered in car porno, I can live with that.
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