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  #1  
Old 09-12-2010, 03:31 PM
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Best way to install a cable engine shut down?

My Girlfriends 240D 4 speed is not not shutting down.

I have about 15 min of interest in following vacuum diagrams etc. Her door locks aren't working either and I had some nice advice on how to fix that here, but just find I have more important things to do than chase vacuum stuff.

She and I just want no vacuum system except the brake booster.

I want to fix the shut down with a cable.

I like the KISS principle and the Mercedes didn't follow that with the Vac system.

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  #2  
Old 09-12-2010, 03:36 PM
Craig
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Bring it to someone who knows how to fix it correctly.
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  #3  
Old 09-12-2010, 03:48 PM
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you'll Drive yourself mad trying to rig up some cable. It's not honestly that hard to trace a vacuum system leak, Just get a mighty vac and test the lines.
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  #4  
Old 09-12-2010, 04:16 PM
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Quote:
Originally Posted by Craig View Post
Bring it to someone who knows how to fix it correctly.
Never had a mechanic touch any of my cars for 35 years....
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  #5  
Old 09-12-2010, 04:18 PM
Craig
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It will be much simpler to make the vacuum shutdown work than to install a whole new system, but you may need to violate your 15 minute rule and read the vacuum diagram.
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  #6  
Old 09-12-2010, 04:26 PM
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As far as I know there are two ways these engines turn off (my knowledge is based on the om617, but I think it can be applied to your engine as well)

Method #1) via the key, when the key is turned to the off position vacuum is sent down to a solenoid on the back of the injection pump and the engine is turned off.

Method #2) via the stop lever on the linkage. Pressing the stop lever pulls up on one of the IP linkages and stops the engine.

Based on that I dont think you could rig a cable system to do it. You'd have to attach the cable to the IP linkage, which also travels in the opposite direction you'd be pulling so the cable would have to be sufficiently long so it could have full range of throttle motion. I'm not sure you'd be able to pull sufficiently hard to actuate the linkage.

Now, if you wanted to simply rig up something temporary, you could find the vacuum line that feeds the shut off solenoid (should be easy to find), extend it into the cabin... Find a vacuum source (maybe Y off of the booster line somewhere...) and put a valve in the cabin so that she could simple turn the valve so it shuts off. (its essentially doing the same thing that method #1 would do)

However this might not work if you have a broken vacuum shutoff solenoid.


And on the vaccuum door locks, I'm not entirely sure how the 123 chassis is but the 126 and 201 have a separate electric vacuum pump for the locking system.
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  #7  
Old 09-12-2010, 04:36 PM
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Quote:
Originally Posted by Craig View Post
It will be much simpler to make the vacuum shutdown work than to install a whole new system, but you may need to violate your 15 minute rule and read the vacuum diagram.
Prolly right that it will take less time to fix it than rig a cable. When I'm calm I will look at it. Meanwhile she will continue to stall it with the clutch.

I'm used to cable shut downs on other diesels and I like them.
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  #8  
Old 09-12-2010, 04:41 PM
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Did the car take a while to shut off? Did it take a second or two AFTER the key was turned off for the car to actually shut off? If yes, you might want to check that solenoid on injection pump.
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
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  #9  
Old 09-12-2010, 05:34 PM
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The easiest one is simply to run some Vacuum Hose from the Vacuum Shutoff on the IP that is long enough to reach the Driver and have the Driver simply suck on the Vacuum Hose.
That part of the job can be done in 15 minutes.

If you or the GF are embarrassed about sucking on a Hose in public you might provide some sort of Bulb to squeeze like one of those Fuel Transfer type hose setups with a Bulb.

Or find something else suitable to create the Vacuum.

The above assumes the Vacuum Shutoff on the IP is good.
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  #10  
Old 09-12-2010, 09:03 PM
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We had a thread like this not that long ago. Maybe you could do a search & save reinventing the wheel.
As I said in the other thread;
Sucking on a tube may be interesting.
I can just see it now, the officer is at the window & says 'would you please turn off your car & get out"
You reply, "ok, I just have to suck on this"
I would love to see the look on his face !!
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  #11  
Old 09-12-2010, 09:13 PM
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There is a universal choke cable that all the parts stores carry... Personally, I think that the only reason there is the vacuum shutoff system is because mercedes was trying really hard to make it so that the normal people just turn the key counterclockwise and the car turns off... if they did not have that constraint, there would've been a cable pull shutoff.

Having said that, chances are that your vacuum leak is in the 2/3 vacuum switch on top of the valve cover and that can be replaced for about $20 bucks.

Also, no vacuum pump => no brake booster...
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  #12  
Old 09-12-2010, 09:35 PM
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Plug off the door lock system and be done with it. All you need are 2 lines, one to the shutoff (brown) and one to the climate control (green).

Quote:
Having said that, chances are that your vacuum leak is in the 2/3 vacuum switch on top of the valve cover and that can be replaced for about $20 bucks.
Manual cars don't have them.
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  #13  
Old 09-12-2010, 09:54 PM
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The KISS principle is the SUCK principle in this case. It takes precisely 43 seconds to pull off the brown vacuum line to the shut off valve, put a piece of rubber vacuum line in it's place and feed it out thru the cowling sticking up near the wipers. Any potential embarrassment can be avoided by appearing to make a close examination of the wiper blades when sucking on the hose.
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  #14  
Old 09-12-2010, 10:56 PM
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[QUOTE=Diesel911;2543228]The easiest one is simply to run some Vacuum Hose from the Vacuum Shutoff on the IP that is long enough to reach the Driver and have the Driver simply suck on the Vacuum Hose.
That part of the job can be done in 15 minutes.

If you or the GF are embarrassed about sucking on a Hose in public.



I am sorry ,but is it me I LMFAO! Although it may work could you imagine seeing this. Please read the vacuum diagrams
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  #15  
Old 09-13-2010, 12:34 AM
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Quote:
Originally Posted by Gillig View Post
Manual cars don't have them.
OOH right, sorry 'bout that... should be even easier to find then!

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'46 Willys (project)
"Nothing seems to be the way it should in this garage." -jt20
"Smarter than an engine, dumber than a hoodlatch..." -jt20
"Start jumping up and down to smoosh down those engine mounts" -DeliveryValve
"no" -kerry
"At this rate, you may have it done by winter" -layback40
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