run away diesels

[Hodge]

Didn't kill the alternator on the Q? The regulators really do not like having an open circuit.

The GQ owner is on the cans next to me as I type this. Can confirm the Alternators been fine and its been around 3 years maybe since then?
It was a short run down from Matlock to Woods point rd where the tow truck was. Maybe 2-3km max distance.
But the TD definitey kept running when battery removed and alt wire taped back.

[mudnut]

The GQ owner is on the cans next to me as I type this. Can confirm the Alternators been fine and its been around 3 years maybe since then?
It was a short run down from Matlock to Woods point rd where the tow truck was. Maybe 2-3km max distance.
But the TD definitey kept running when battery removed and alt wire taped back.

Wow. I had no such luck. Running an old Corolla for a few minutes without the battery killed it.

[Winnie]

Hmm I'm certainly no expert and haven't experienced first hand but only going off what I have been told from knowledgeabe people.

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[AB]

100% td42 engines run with no battery, just good old compression chug chug.

I drove home from loveday SA 10 hour trip with no alternator and it was fine.

I just started old mate up and disconnected battery for 5 mins and kept chugging.

Fuel and compression. Love these engines!


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[MB]

Wasn’t there AB but your battery must’ve still been connected with a poofteinth of power in it to keep the diesel fuel solenoid open?
Our old Acco Cummins wouldn’t run with a blown solenoid fuse and remember we had to hot wire Philstar’s 6.5 Chev solenoid too out bush when his security system malfunctioned cutting power to it too. I honestly thought our beloved TD’s were the same with zero + power to keep the diesel line open?
Mad runaway I thought was mainly from failed turbo seals and big big diesels needed a tomahawk or the sharp like to quickly cut the post turbo intake side off from feeding oil in?


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[MB]

I stand corrected AB, my Apologies, Great Facetime tests:
#1 Still runs and turns off with main battery terminal + disconnected.
#2 Still runs and turns off with main & auxiliary battery ++ both disconnected.
How does this work Folks, is it still the working alternator when running being connected to the system that allows the engine/solenoid to keep open?


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[MB]

Just read this thread properly from past Legend’s industry experiences, sounds like two options for humongous diesel’s?

#1 Runaway from turbo failure = choppy air off post turbo?

#2 Runaway from injector pump failure = choppy any electrical/mechanical lines to solenoid/fuel lines?

If in doubt chop everything before blowing up a very expensive engine maybe ??

EDIT:

#3 Small diesels can be stalled by means of manual transmission, air intake blocking pre turbo and or worst case if all fails go the choppy??

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[Fingers in Aus]

Truck mechanics where I used to work carried a piece of board in their breakdown vans for those occasions.
If they start running on oil from the turbo etc. cutting air is the only way to stop them other than the rods coming out the side.

[mihit]

Truck mechanics where I used to work carried a piece of board in their breakdown vans for those occasions.
If they start running on oil from the turbo etc. cutting air is the only way to stop them other than the rods coming out the side.

Thoroughly correct.... but, epic thread dredge...