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Old 08-14-2013, 05:54 PM
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Join Date: Mar 2011
Posts: 61
1991 300D 962.961 vacuum circuit problems


I am swapping a 1991 2.5L diesel into a 1997 Jeep Wrangler and nearing the more ways than one. I believe that I have stepped down the motor from electrical to mechanical based on helpful posts from this site.

So, I want to have the engine stop when I turn off the key. I have read about om617 engines using the eng. overload valve. I would like to do the same. Below I have a photo with what I hope is the 962's overload valve.

1. Do I plug the outlets from the alda to the "Charge Air distributor"?

2. If I connect one end of the tubing to the overload from the "Stop Unit" where should I connect the opposite?

3. With power on the circuit should be closed to run/open to stop?

4. Should I close off or loop all the auto trans vacuum lines since I am running a manual.

I am going off of the pdf for a vacuum line routing on a 602.96 w/ manual from my MB manual.

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Old 08-14-2013, 09:52 PM
pwogaman's Avatar
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Join Date: May 2003
Location: Northern, Virginia
Posts: 2,029
the vacuum circuits can be found here

Peach Parts W124.128 User Group.

80 280SL
85 300SD
87 300TD
90 300TE 4Matic
90 300D 2.5 Turbo
92 300D 2.5 Turbo
92 300TE 4Matic
01 Saab 9-5 Wagon
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Old 08-15-2013, 11:06 AM
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Join Date: Mar 2011
Posts: 61
Thanks pwogaman. I have the PDF for the circuit. I am just trying to make certain about the shut-off, auto trans, etc. I want to reduce the vacuum leaks and cranking before I restart this motor.

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