Runaway Diesels Do's And Don'ts

[Waystro]

So had a fun day at work yesterday flipped the CatSteer(I wasn't driving just a bystander)
Machine is supposed to shut off when the lap handle is lifted up but failed to do so which resulted in a runaway Ok no big deal coworker climbs up opens door I throw up a wood chock big enough to choke the air off and kill it but he freaks out and starts screaming he can't find the air filter and decides to start pulling on the throttle engine is screaming so long story short we(mainly me) choke the air off well what do ya know it dies. Later he tells me he could have just stuffed a shop rag and killed it.

So I put this in With the diesels instead of the lounge. So now the Do's and Don'ts of a runaway.
Do Choke the air off with a wood block/piece of metal etc
Do Keep Calm
And All Ways be prepared for a Runaway

Don't Panic
Don't Use a rag or piece of cardboard to kill engine it will be sucked into engine

 

[AcIdBuRn02ZTS]

I've personally seen a runaway suck a 5" hole through a shop service manual. A thick piece of wood or metal is the only way to go.

I've always wondered how much damage a co2 fire extinguisher would cause if you were on the road and couldn't seal off the intake..
Just hose the filter box inlet down until it dies out.

Anyways...

 

[riotwarrior]

2 options

1st
CHOKE OFF OXYGEN

2nd
REPLACE OXYGEN WITH NON COMBUSTIBLE GAS

board or CO2 dont matter which.

 

[crash-harris]

Or choke off the fuel supply, but on our IDI's that's not so realistic. IP's dont like to run dry and our (stock) lines are steel. I've been thinking of making a 5.5x5.5" piece of 1 by for this reason. Drill a hole for the hex anchor on the intake and screw a small chunk of 2x4 over that hole to make a seal/little handle. Would require yanking the filter housing (if it's on there) but that could be done right quick in that situation.

 

[Greg5OH]

Runaway is too always on my mind. Best way for me is to have a 4" diameter plate that woudl slide over the turbo inlet that would eb connected to a handle inside you coudl jsut slam forward and close the air supply.
DUmping it in 3rd or 4th could work but Im worried about damaging the trans, not to mention the clutch.

 

[Hydro-idi]

Or choke off the fuel supply, but on our IDI's that's not so realistic. IP's dont like to run dry and our (stock) lines are steel. I've been thinking of making a 5.5x5.5" piece of 1 by for this reason. Drill a hole for the hex anchor on the intake and screw a small chunk of 2x4 over that hole to make a seal/little handle. Would require yanking the filter housing (if it's on there) but that could be done right quick in that situation.

That wouldn't matter if the engine runs away on its own oil. You can try all you want to shut diesel fuel supply off and it wouldn't do any good if she's burning crankcase oil.
I keep a fire extinguisher in truck just in case stuff like that happens. I remember watching a YouTube vid when a diesel truck engine ran away and the guy was trying to unplug the battery cables. Now what good would that do lol.

 

[IDIoit]

easiest way on our 6.9/7.3

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[riotwarrior]

Slide valve between turbo and air intake on a pull cable in cab????

 

[crash-harris]

True dat! Just.one more reas9n for me to work towards a turbo. Smaller/flatter intake surface to block off in the case of a runaway

 

[Koch13351]

I imagine the heat built up in the cylinders in the event of a runaway with the sudden addition of extremely cold co2 would cause some catastrophic damage of it own. Like cracked, well, everything.

 

[DaveBen]

Slide valve between turbo and air intake on a pull cable in cab????

That is what I had on my 8V92 TA. There was a handle, behind the driver's seat, that you pulled and it closed a metal door at the turbo. I never had to use it. I did jamb the transmission into 6 or 7 gear (13 speed tranny) and let the clutch out to kill it. ******* all the gear.

Dave

 

[Waystro]

Co2 would be a good backup plan
I'd use the wood block but Greg got me thinking a plate of metal with a rod welded long enough to block off air but not have to lean over a Screaming engine. Hmm time to measure and cut

 

[icanfixall]

I sure would like to have seen this guy in a panic trying to kill a run away engine. Some just do not understand when our engine in in run away state the fuel or air MUST be cut off. Then the engine surely will die. Also if thinking the governor will keep the engine from over revving think again. The governor is in our injection pump and it cuts back on the fuel to maintain the engine power and rpm. When the engine is running on another fuel source you have no rpm limiter. Another good tip is NEVER pour any kind of a fuel source down the intake. That too will cause a run away but only as long as it eats this fuel. Eating its own oil is going to cause rpms that are way higher than the normal red line set by the governor....Personally I have only viewed a run away on u tube. Some are sure funny too.

 

[R32R1]

What can be done to prevent a runaway?

 

[Greg5OH]

With a turbo engine, make sure you dont have a leaky oil seal on the cold side. If the seal blows and you leak oil into the cold side it will send it into your engine at an unmetered rate, the engine will eat itself alive.