13BT running backwards???

[FLYINGLOW]

Well a friend of mine was just out wheeling this morning testing out his new E-locker... He went up a ledge until the engine bogged down, he slipped back a bit and pushed the clutch in to roll off it. He put it in first gear and it went backwards. Put it in reverse and it went forward... The engine was running poorly and there was smoke coming out from under the hood. He couldn't shut it off so he jumped out and popped the hood. Smoke, exhaust to be precise, was coming out the intake. He stalled it out and re-started it and it ran normally. He called me in a panic after getting home saying WTF!!! I told him that when it bogged down and rolled backwards that it just started the engine running in reverse. I have never heard of this in a vehicle before, especially not in a deisel. My weedeater does it all the time though... Is this common or is it from the elocker Radd sold him?

 

[Deny]

This happened to me in my BJ42 this summer for the first time, but I have heard lots of people talk about it in the past. It is really wierd having smoke coming out of the snorkle.
Cheers,
Deny

 

[_Walker_]

HAHA! Had that happen in my BJ74 (also 13BT) a few weeks ago at the airport in Victoria!!
From my understanding if you shut it down fast enough should be no problem… the way the 13BT shuts down is by a flap in the air intake, however if your intake air is coming from the tail pipe its somewhat useless…. So yes stalling it out is the only way to stop it.

I was parked when I got mine to run backwards, I just VERY lightly tapped the starter button im thinking just long enough to get the thing moving but not enough to build any momentum going the right way….
The big things id be worried about would be oil (pump is running backwards IE no lube) and or lighting your filter on fire, which I recall reading somewhere has happened a few times and resulted in a cruiser BBQ when left unchecked… so the one thing to get out of this is if you ever lend your rig to someone make sure they are aware of what CAN happen…. I have images of the GF taking it out for a spin, getting it going backwards taking the key out, watching the truck burn, then saying “I told you not to buy that stupid truck!”


Edit add:
BTW apparently this is ultra common on some diesels…. The 3B (which most of us here are more familiar with Im assuming) used the low oil PSI cutoff on the EDIC to prevent this from happening…

But Iv been talking with a few friends and especially on older larger marine diesels this is actually how the put the boats into reverse. They would pressurize the air tanks, shut the motor down, then dump the tanks to restart it going the other way… these things were to big and bulky to have any sort of gearing system. However these days most big boats are diesel or turbine electric so its not so much of an issue… however still a rather interesting tid bit!

 

[FLYINGLOW]

what the hell was the turbo doing through all this???

 

[_Walker_]

mine made an awful noise... im sure it was not very happy.....

 

[roscoFJ73]

When they run backwards there is a real chance of fire from the exhaust setting fire to the air filter. The 2H have some device to stop the engine from doing it but if removed they will do it also.
I did have a OH&S circular somewhere of a report regarding a HJ75 catching fire underground after the engine ran backwards ,igniting the paper air filter.

 

[Z()LTAN]

the newer engine cant run backwards 1hz+

the injector pump does not allow this

 

[Radd Cruisers]

Got the frantic phone call yesterday from Martin, he explained the situation and was not sure if something was badly wrong?

I can honestly say I have never seen this, but its good to know what happened.


He did however succesfully install a elocker brand new from toyota into his 74 and I believe he removed the motor and put in a cable.


When he gets back from flying those overgrown egg beaters I will try to get him to come by the shop so I can take a few photos.

Rob

 

[MoCoNative]

Diesels can and will run backwards. I remeber my dad talking about a large diesel crane he operated years ago. They had to load steel in a yard at the site. Then go up a hill and unload and place the steel on the site. It was one of the worst winters on record. They had trouble getting up the hill sometimes and would stall. They had to be cautious of rolling backwards.

Newer diesels with electric selonoids on the fuel supply shouldn't do it, and are easily shut down. I figured the B's had a selonoid on the pump, didn't know they only shut off the air.

 

[_Walker_]

well the 13BT is only air, the 3B uses the EDIC arm...
Hey out of curiosity you guys run the Chinook?

 

[FLYINGLOW]

Got the frantic phone call yesterday from Martin, he explained the situation and was not sure if something was badly wrong?

I can honestly say I have never seen this, but its good to know what happened.


He did however succesfully install a elocker brand new from toyota into his 74 and I believe he removed the motor and put in a cable.


When he gets back from flying those overgrown egg beaters I will try to get him to come by the shop so I can take a few photos.

Rob

He is so funny when he gets excited!!! Next time follow up on his tech support, I only got 2 phone calls and lots of swearing about getting the birf off and on!

Do you mean removed the motor or engine? Maybe he was confused and took the engine out of the truck instead of the motor off the locker and caused it to run backwards?

You might be able to catch him on his way down island next thursday or friday.

Hey out of curiosity you guys run the Chinook?

Yup, we got one of em kicking around.

 

[FLYINGLOW]

Thanks for all the info everyone. I will pass it all along to him and warn him of it happening again in the future.

 

[astar]

When you say shut it off quickly, how quickly do you mean??? My run for about 2 minutes before I shut it down.

 

[_Walker_]

Well it was "maybe" running for 8 seconds ish? definitely less than 10, within the first 3 knew something was odd, pulled the key by 5 seconds in, no go, took a second to think of how to stop it, dropped the clutch with the brake on, presto dead...

The issue people are raising is mainly to do with no lube, so its basically like running the engine for 2 min with no lubrication, that being said if the truck was already warmed up and all the gallareis were already wet its probabbly not as much of an issue.... that being said whats done is done. My thought is that these are pretty tough trucks to kill so you should be ok, but next time you do an oil change maybe put in one of those magnetic plugs just to pull any excess s*** out....

 

[brownbear]

When you say shut it off quickly, how quickly do you mean??? My run for about 2 minutes before I shut it down.

you're probably just fine.