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#1
04-22-2008, 06:51 PM
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tHROTTLE LINKAGE QUESTION
Still pretty mucha newbie on these here oil-burners, but I'm learnin'. Got a question on the throttle linkage set up. I find that I have about 1 - 2" of free travel on the linkage coming out of the firewall & up to the cam on top of the valve cover before the push-rod the the IP starts to move and engine comes off idle. Is it normal to push the fuel pedal down about 2" before you begin to accel.? The bushing on the f/wall is good & as are shifting points. I can live with it but wonder if I'm getting full fuel delivery with a WOT.
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TAZ  '84 300D Turbo - 250+K 
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#2
04-22-2008, 07:27 PM
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What year and model? No that does not sound normal. You can check for full travel by pushing the pedal all the way down and seeing if the linkage on the injection pump is hitting the limiter screw.
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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine
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#3
04-22-2008, 07:46 PM
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Sorry - it's an '84 300D Turbo - NA version. I'll check the rod travel on the IP. I just don't want to start "adjusting" the half-dozen linkage rods on the thing & end up bollocks-ing up the whole works for somthing that's not that big a deal. (ask me why I'm worried about that
 )
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TAZ '84 300D Turbo - 250+K
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#4
04-23-2008, 01:13 AM
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PLease see the PM I sent.
I had the same problem when I bought mine I have a Fedral Mercedes. This is reasonabley safe to do: Remove the plactic that covers the 2/3 way valves (mine has 2 valvs). When you take the slop out of the linkage you do not want the plactic Cam that opens or closes the valves to move. Where the rod attaches to the fire wall is the rubber part that the linkage rod goes into rotted or ok. If it is OK follow the rod towards the front of the engine and you will see a small bolt with a 10mm head. Loosen that and you will find that there is a kidney shaped slot that you can pivot the rod around in until you take up some of the slop and tighten the Bolt. The next place I went to was the rod that goes from the throttle arm on the Fuel Injection Pump to the linkage above it. (Your Idle speed should be properly set before you do this.) I pried that linkage rod off the ball on the upper linkage and adjusted the rod to take out the excessive play. You do not want to adjust the rod so tight that your that it effects your idle. Meaning that you must leave enough play in the linkage so that the the Injection pump throttle lever can return to and make contact with the idle screw stop. And that solved most of the problem for me with out interfeering with the other linkage rod adjustments that are mounted on the Valve Cover. You can adjust the rod comming from the Accelerator pedel to the part on the fire wall to take up some slop but on my car I could not adjust the rod anymore.
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84 300D, 82 Volvo 244Gl Diesel
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#6
04-23-2008, 02:05 AM
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North America?
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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine
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#9
04-23-2008, 02:47 PM
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lol.... Actually, I meant No. American - (Well, really Calif., which is kind of like another country
 ). Mine dosen't have the 2 plastic paddles on the throttle cam.
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TAZ '84 300D Turbo - 250+K
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#10
04-23-2008, 07:07 PM
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Quote:
http://www.pauldrayton.com/uploadfiles/merc/Service/W123/w123CD2/Program/Engine/617/14-050.pdf
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84 300D, 82 Volvo 244Gl Diesel
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#11
04-23-2008, 07:30 PM
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Check that bushing on the firewall.
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