Engine/Transmission (1994 - 1998) Turbo Saver or This

[Dave Remillard]

Has anyone tried to wire in a 12 V/DC time delay off relay to imitate what the Turbo Saver device does. It seems that by installing such a relay in the circuit to the shut down relay could do the same thing. Someone please shoot me down if this is a bad idea. I realize that precautions would be needed to protect such a relay from the elements, but that would be the easy part. Thanks

 

[T. Baker]

I assume you meen the truck would stay running until the timer shut it down. My question would be would you really want to walk away from your truck while it is running. What if it failed?

 

[drees1]

I hear what your saying about the timer. Is all thats needed a timer on the fuel shutoff solenoid relay? No problems with the alternator or anything else having the key off and idleing? Please post how you would tie it in and where you get the timer, etc. Very interested.



Doug Rees

 

[jerryrigg]

I forgot about this thread, I just requested an update on his progress.



-Matt



https://www.turbodieselregister.com/forums/showthread.php?s=&postid=532957#post532957

 

[illflem]

Don't think a Turbo-Saver nor the wiring diagram on the link will work on a 12 valve. It would be simple to make your own for a 12 valve though, just use a time delay relay to supply 12+ to the shut down solenoid. There are tons of time delay relays availible. problem is finding a 12v DC one. Another even cheaper option would be to use spring wound bathroom timer switch instead of the relay, they are a availible in a 10 minute max, 1 minute increment configuration for about $15 at bigger hardware stores.

 

[Steve Campbell]

Weren't there ....

delayed timer shutdowns on the headlights form the late seventy/early eighty's cars? Could you find one at a wrecking yard or at an auto parts store?



Let us know if you are sucessful

 

[Dave Remillard]

drees1

I can't provide pricing info at this time. I deal weekly with an outside sales guy from an electrical wholesale house. I'll get a price for the relay and relay base this coming week from him. A 12V/DC relay shouldn't be to hard to find, however I'm close to a larger city than some of you, which makes some items more available than in other locals. I haven't looked at the wiring diagrams yet either. I can picture the circuit in my mind, but I still need to see the diagrams. I'll post a drawing and some prices later in the week.

 

[Dave Remillard]

12 Volt Time Delay Relay

I have found and ordered a timed delay on break relay. The relay is encapsulated so it can withstand the elements under the hood. It's rated for 1,000,000 full load operations, and the contacts are 20 amps resistive at 30 VDC. I also think I have the wiring diagram worked out, but have a question or two. The diagrams in the manual are a bit confusing. Can some one explain the number and letter designations for me. I've got the letters figured for the color of wire, but still not 100% certain about the others. I think one indicated which fused circuit, and another represents which size of fuse. Any help will be appreciated.

The price for the relay is just under $35. 00 and no base is needed. The only other thing I need to get possibly is an in line fuse. If any one wants the spec. sheet for the relay, just e-mail me and I will forward the file to you. Thanks

 

[illflem]

Have the relay switch between 12+ and the solenoid hold wire I think it's brown or violet. On this wire add a diode, flow towards the solenoid, connect the switched relay terminal to the solenoid side of the diode, connect the relay coil terminal on the other side of the diode. Add a fused always hot 12+ to the switched relay terminal and a ground to the coil side of the relay and you're done. All the wiring is easy to get at and in one place.

 

[drees1]

Diode?

Bill,



What is the function of the diode? Is it required?



Doug Rees

 

[bighammer]

Couldn't you wire it into the ignition switch so that everything keeps functioning as it normally would?



What happens to the charge circuit when the switch is off but thengine keeps running?

 

[illflem]

Re: Diode?

Originally posted by drees1

Bill,



What is the function of the diode? Is it required?

Doug, a diode is like a one way valve for electricity. It will allow you to feed the relay's switched and coil wires from the same wire. It will also keep power supplied to the solenoid after turning off the key from feeding backwards and energizing parts of your electrical system that should be off. A diode will probably cost less than $5 from Radio Shack.



On the charging system question - I asked the same of folks who have installed pull shutdown cables, they said it makes no difference if you turn off the key before or after pulling the cable to shut down. I was concerned because I once owned a tractor that would fry the alternator if the engine was running with the key off. Apparently not the case with a Cummins.

 

[drees1]

Thanks on the diode info.



I did have one of those snub nosed Mercedes trucks with a pull to stop cable direct to the pump. Alternator was Bosch, and there was a decal on the dash that said "Do Not turn off key before engine stops. Serious alternator damage may result" I did not know why that was so. But I'm seeing a response that it is ok with our trucks? Just confirming.



Doug Rees

 

[DennyDay]

Shut down timer

Used switch Bill suggested on my '94. Worked with out a problem wired to pump. The switch is a about $15. and is called a line voltage spring wound timer. THE SWITCH MUST BE MOUNTED IN A VERTICAL POSITION, as in a wall mount, if you expect it to last more than about 2 weeks. The switch is not bullet proof and vibration will take a toll. I am still using that switch on my fuel tank transfer pump. The last on lasted about 100 k miles. In shutting off the engine use, It will not kill the engine by hitting the brake as the Lifesaver does.



Denny