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  #1  
Old 02-23-2013, 03:53 PM
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1974 240d W115 throttle question

Hi,

Bought a "new" MB the other day, a 1974 240D. Finally got back into the MB diesels, been gone too long. I had a 1987 300d a couple of years back.

This one was converted to a wvo prior to me buying it. Not sure what I am going to do with that part of it, but it is interesting. The Engineering Dept. of a local college converted it as part of a project.

Slowly working my way to bringing it up to road worthiness - changed some filters, cleaned up a few things. Have yet to install a clutch slave to get it on the road.

I have a question regarding some of the linkage up by the intake manifold.
It is obvious it is missing a few components.

Can anyone put me in the right direction of getting the linkage back as it should? I have two manuals but none of them show an exploded view of the area in question.

Please see attached photos.

Thanks in advance,

Dwayne

Attached Thumbnails
1974 240d W115 throttle question-imag0580.jpg   1974 240d W115 throttle question-imag0583.jpg   1974 240d W115 throttle question-imag0585.jpg  
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  #2  
Old 02-23-2013, 04:21 PM
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So I don't have my car with me right now, but your setup looks okay to me. What exactly makes it obvious that it is missing parts? Maybe I just don't see it, or maybe I just don't recall exactly what my 220D looks like. But as far as I can tell, that is okay. If you do a google image search, you can find a bunch of photos of that part of the car. And then compare to what you have in front of you. Good luck.
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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).
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  #3  
Old 02-23-2013, 04:27 PM
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image from MB

Here is the 240D exploded view of your throttle valve. Hopefully this helps.
Attached Thumbnails
1974 240d W115 throttle question-throttleplate.jpg  
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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).
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  #4  
Old 02-23-2013, 04:31 PM
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Looks OK to me too. The second throttle is supposed to be loose, it is only there to prevent the engine from running in the wrong direction.
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  #5  
Old 02-23-2013, 05:13 PM
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Response

My bad on saying obviously...

I must have a vacuum leak, because I have to push the "arm" (at the 12 o'clock position in the last photo) in, towards the valve cover, to turn off the engine. Govert, is that what you refer to as the "2nd throttle," and it's supposed to be loose?

When I push on the "arm/2nd throttle," it just lazily swings back and forth. It just doesn't feel correct in it's movement. It just flops all around.

Thanks for all the input so far and the exploded view. I appreciate all advice!

Last edited by junker68; 02-23-2013 at 05:32 PM.
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  #6  
Old 02-23-2013, 06:02 PM
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If you push the arm towards the valve cover, you kill the engine by depriving it of air, you block the air supply. See the diagram below:



Normally you would turn off the engine by means of the gorilla knob, pushing it in pushes a cable so that a lever on the diesel pump pushes the rack into the stop position. You can see the lever in the picture below at #2. The cable that is connected to the gorilla knob is loose in the picture:



The air valve in the intake is there to control the amount of air that flows through a venturi. The vacuum created by the venturi governs the diesel pump.
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  #7  
Old 02-23-2013, 06:38 PM
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Yeah, linkage looks ok to me too. Having a butterfly shut off is a nice feature.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #8  
Old 02-23-2013, 07:03 PM
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Thank you all very, very much!

Dwayne

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