Cummins 4BTA Emergency Shutdown

[WM-300]

Today after almost a year of conversion on my 1943 Dodge Carryall with a 4BTA, it was time to light the oil burner. The engine instantly fired and ran flawless. However, I started thinking about the 'possible' need for some type of emergency shutdown. The potiential for a runaway especially on a Turbo Diesel exists. The sure method is total shut down of all intake air. In looking at the 3 inch air intake pipe to the turbo, I decided some type of butterfly valve in that line operated by a Bowden Wire type pull cable would be ideal. I could easily build such a Buttefly, but I am getting pressed for time to have a completed roll out in the spring.



So, does any one know of a commercial type 3 inch Butterfly that I could mount on my air intake pipe. The only heat it would see is engine compartment heat. And probably it will never be needed. But, if the engine did run away, an immediate, quick, easy to get to shutdown is the only way to save the engine. The Bowden Pull Cable could be mounted right under the dash, easy access and quick



Paul

 

[HoleshotHolset]

I found this one real quick doing an internet search on Google...



It's beefy as heck... . I have no idea how much it goes for... but you can get in touch with the folks that make it from their website: www.fpevalves.com/ They're out of Waukesha, Wisconsin...



Matt

 

[83 crew cab]

Matt that is cool just what I was looking for for the lil red will have to give them a call monday thanks George

 

[Steve Graham]

Paul,

Is your 4BTA an early one with a "VE" pump? If it is you have a emergency shut down on the pump below the throttle lever. Other wise keep a CO2 fire extinguisher handy. I have both.



Steve

 

[WM-300]

Yes, it is the VE pump. I know about the manual stop lever. But if you blow a turbo, the engine can runaway by sucking engine oil.

The lever shut down the the pump will do nothing to stop that condition. Not likely a runaway will happen. But when we are doing conversions we can build in some features not found on the standard production engines. The emergency shut down on the air intake is fool proof, cheap and quick to build if a commercial version is not available at a reasonable cost.



If I end up fab'ing one up, I will post pictures when its done.



Paul

 

[WM-300]

One more thought. The air intake Emergency Off will also serve another function. Hide the pull knob up under the dash. When you leave the truck, PULL the emergency stop and leave it pulled. If someone wants to steal the truck, Unless they are familar with diesels, they will never start it.



Paul

 

[bigkid59]

Detroit for years used an emergency shut down flapper in the air inlet to the blower. The metal flap was spring loaded to close firmly to shut off the air flow. There was a catch assembly that held the flap open for normal running but a cable operated release was built into the catch assembly to trip it to close.



I would suggest looking at one of these devices to see if you can adapt it for your use. It is a proven design and should be easy to find and easy to mount.



Hope this helps!



Just remembered that these devices were part of the aluminum air inlet on top of the Detroit blower. That is where to look if you want to see one. Most of them had round inlets on them for air inlet hose connection and several sizes should be available. You might need to cut off the part that bolted to the blower and adapt it to whatever connection you might need. One of these devices should be dirt cheap from a truck or heavy equipment junk yard or repair shop.

 

[therabbittree]

another thing to think of is when the flaper shuts and that engien is running away 2500 plus rpm it will suck in your turbo oil seals or at least damage some. . i know the detroits would ruin some seals. . either blower and turbos or on or the other etc. . the vw actory race cars have acable operated bypass valve in the turbo oil feed line that they can pull if they either blow a turbo or have a runaway. . thats what i would use a the mechanical fuel shut of and a oil feed shut of for the turbo feed... .

just my ideas

thanks

Deo

 

[WM-300]

Interesting idea on the turbo bypass oil feed line. I have seen the flappers on the older detroits. They were very effective.



Paul