finally found one at the yard

electrical connections:
brown is positive +
black is negative -

Vacuum port connections:
Outside port connects the Injection Pump vacuum diaphragm.
Center port connects to a vacuum source.


Is this correct?





tested above w/a vacuum pump, seems to work properly


thanks,
manny

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toyota fj40 landcruiser with a mercedes om617 3.0L turbo diesel

617's never had an electrically activated shut off valve, they were all strictly vacuum. What's that electrical version from?

__________________
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

You are correct, om617 uses a vacuum diaphragm to cut fuel at injection pump.

I believe this is the device (vacuum solenoid) that provides vacuum to the vacuum diaphragm, once you kill power at the ignition key.

__________________
toyota fj40 landcruiser with a mercedes om617 3.0L turbo diesel

Not from any 617 powered MB to my knowledge. The ignition key controls a mechanical vacuum switch, not an electrical switch. What kind of car did that electrical switch come from? Not sure how the 126 with the electric pumps for the door locks work, but I guess it might be an electric vacuum switch to open the doors on a 126.

__________________
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

switch came from a 300SD...mounted on the firewall, near the IP.

__________________
toyota fj40 landcruiser with a mercedes om617 3.0L turbo diesel

On my 84SD the brown vacuum line from the shut off valve does not go to a solenoid under the hood but goes thru the firewall, I'm assuming to a mechanical switch at the ignition key. Perhaps later model post 617 SD's were set up differently.

__________________
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

Umm, that part has nothing to do with engine shutoff. Thats the device between the intake manifold and the Alda, it vents excess boost pressure to the atmosphere...

__________________
'81 300SD- OM617.951, Euro Head Lights, Hella 550's, 2.5" Turbo-Back Straight Pipe, ALDA Removed, Camo Dash + Seat Covers, Boost Gauge, DU Floor Mats, Cobra CB, LED Trunk lights, and other things...


'03 Chevy CCSB LT LB7 "P-Stroke Killer"
219K mi. - AirDog II 165, EFI Live, Alligator Stage V, ISSPRO EV2 Pyro/Boost, PPE Boost Valve, LML Manifold, MBRP Downpipe, Debadged, Bills Custom 3.5" Turbo Horn, B&W Hitch, S&B Intake

My overboost protection solenoid doesn't look like that.

__________________
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

That's a shame, cause on the workbench this device appears to be what I was missing

Since I no longer have my 300SD (only kept the motor), one of the items on my todo list is being able to shutdown my diesel.

This over-boost device, competes a vacuum circuit when turned off...It does release some into the atmosphere, but It still may work (depending on how much vacuum the fuel-shutoff vacuum diaphragm requires).

thanks again for the info.

__________________
toyota fj40 landcruiser with a mercedes om617 3.0L turbo diesel

many have used this to shutoff the motor when the diesel is put in a gasser. it will work, it's not the way diesel MB's are controlled.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

It will still work, it looks like his 617 is no longer in a MB. You should be able to make that work. Figure out if it's supplying vac with power or without, then just wire it so that when you turn the key they vac will go through the solenoid to the IP and shut your engine off. But you'll also need to make sure that the vac disapates before you try to start the engine again or you'll have hard starts or no starts.

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I agree that if that thing is an electrically controlled vacuum solenoid switch, it should work. I think it needs to be an unenergized--transfers vacuum switch/unenergized--stops the transfer of vacuum. But it doesn't seem like there's a bleed-off vacuum feature in it.

__________________
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

I used an electrically controlled vacuum switch from the climate control system
to shut down my 1980 300D. have it set so when key is on
it allows engine to run, when key goes off, engine shuts off - real fast now.

Sorta by-pass the vacuum controlled shutoff on the ignition key.

__________________
80 300D 340K Owned 30 yrs
83 300SD 440K Owned 9 yrs - Daily Driver 150mi/day
02 Z71 Suburban 117,000
15 Toyota Prius 2600 miles
00 Harley Sportster 24k
09 Yamaha R6
03 Ninja 250

that would be correct



thanks for the replies...going to give it a shot.

__________________
toyota fj40 landcruiser with a mercedes om617 3.0L turbo diesel

There is a simpler solution. Run a vacuum hose from the shut off valve into the passenger compartment. Two or three quick sucks will shut it down.

__________________
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