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#1
12-16-2004, 02:56 AM
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Too much to read for me right now. Too tired. I tinkered with mine until I just bypassed it, maybe now I will have the drive to go back and figure it out.
__________________
Think Alternative Energy!  300CD '80 (now gone but not forgotten...) 
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#2
12-16-2004, 03:13 AM
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By the way, that thing was printed in 1971. What the heck was MBZ thinking putting that beast of ancient technology into cars ten years later?
I discuss my simple bypass here: http://www.peachparts.com/shopforum/diesel-discussion/110502-%242-servo-aux-pump-bypass-fix-post771037.html#post771037
__________________
Think Alternative Energy! 300CD '80 (now gone but not forgotten...)
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#3
10-07-2004, 12:33 AM
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#4
10-07-2004, 08:48 AM
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When I bought my '79 300D in August the servo was bypassed. The seller told me she did not want to spend the money so her indy shop suggested the bypass. They just connected the lines straight through under the servo - leaving the servo in place and connected. Problem with that is you have heat all the time and the climate control buttons cause some pretty neat reactions when you press them
 I did not want to deal with the heat and also wanted some functionality so I had my indy install a rebuilt - all is well now. The rebuilts seem to run about $350 from most places.
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'85 300D - 206K (sold)  '81 240D - 149K (sold) '03 Jetta TDI - (sold) '79 300D - (sold)
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#5
10-07-2004, 09:37 AM
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I know that there is a rebuilt servo out there with an aluminum body that won't ever crack. The price on them is roughly a 1/4 of a new plastic one.
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#6
10-08-2004, 01:30 PM
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The holes are rectangular and the perfect size for the "straw" to fit into. It has to be out of the car to do this. They are abouot mid-way up on it. Also, you many want to spray carb cleaner first to clean up the inside if necessary. Or, just put a wanted ad in the parts discussion and see how much you can get one for. Are you sure it's your servo? It could be the push-button unit or the amp on the passenger side under the dash.
Thanks David
__________________
_____________________________________________ 2000 Honda Accord V6 137k miles 1972 300SEL 4.5 98k miles _____________________________________________
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#7
10-12-2004, 05:36 PM
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I just opened up my AC Servo, and am cleaning up and lubercating everything inside, and sealing the cracks in the plastic. My motor is running just fine, so I hope by doing this, it will work like new after I get everything put back together.
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#8
10-12-2004, 10:01 PM
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I almost had everything back together, then the little clip that connecets the rod to the plunger broke off. So I had to pull the servo out and take the whole unit apart. I had everything back together once again, and the clip came loose again, so this time I used the pliers to press it together and the top part broke off. I decided I could use some JB weld on the plunger to, and put the little rod into it, I am hoping it will hold together. Tomorrow I will put it all back together once again. Does anyone know where I can but just that little plunger the metal rod and the clip???
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#9
10-13-2004, 08:30 PM
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My conclusion is that tearing the AC Servo apart, and putting it back together is bad. I had everything working perfect for a short time, then the pressure knocked all the screws loose, and it leaks bad now. I am going to bypass the whole system with some kind of adjustable valve and copper pipe...
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#10
10-13-2004, 09:08 PM
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Mikemover posted this link in another thread.
( ) A digital solution to a vacume servo monstrosity.
__________________
Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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#11
10-13-2004, 09:17 PM
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For a measly $350 you can buy a rebuilt unit
 Mine has been working great  (i think there is a core deposit also)
__________________
'85 300D - 206K (sold) '81 240D - 149K (sold) '03 Jetta TDI - (sold) '79 300D - (sold)
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#12
10-13-2004, 09:30 PM
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Its a more reliable in not a slight bit more costly replacement option. I year ago I would have hopped on it. If mine dies again soon, I still might.
__________________
Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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