2 stroke GM Detroit diesel .......... History

The Detroit Diesel Engine

In 1938 an engine was introduced that would help bring an end to WW2,

very informative reading for a time of lockdown

Clikity ......................................................................................................... ClikClikClik

Clikity .......................................................................................................... ClikClikClik

U're Welcome

cya

A lot of people think (a lot know too) that the supercharger is fitted just for power, fact is they wouldn’t start without it ........ and that they are one of few engines if you stalled it and it was rolling backwards and let out the clutch they would start running backwards, I think when this happened they ran until they grenaded themselves.

Most diesels will run backwards

Im pretty sure they never last long as they don't have any oil pressure
Bulldog tractors would start backwards 50% of the time

6-110's were standard in HD Allis Chalmers
The first of the 6-110's were available with either a blower from a 6-71 or big drum fan type blower but the latter were unreliable and fell apart if over revved

Paul

Everything old is new again. Shades of Commer knocker.
www.facebook.com/edward.snow.376/posts/786627858745897

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There is no doubt that the old jimmy was the most versatile donk ever built...........

Another new thing on an old slant.............

(Sorry about that olfrt , looks like we is talking about the same thing ).

www.foxnews.com/auto/cummins-developing-...-engine-for-u-s-army
.....................Billy...................

So what happened that Fox News report is dated October 2017.

overnite wrote: So what happened that Fox News report is dated October 2017.

Dunno......This is the latest i could see...............
.
. www.cummins.com/news/events/2019/association-united-states-army
]...............Billy................
( Maybe this should be a new thread ..........sorry about that $wishy.....).............

Actually a GM wont run backwards,because the blower is goint the wrong way............we had a 3306T Caterpillar in a Leader 8 wheeler ,and I dont know how many times the air cleaner element caught fire from running backwards..........A driver who wasnt used to the truck wouldnt know what was going on ,and stop the motor straight away.....Put it into forward gear ,and it would go back ...and zero oil pressure on the gauge....next smoke coming from the air cleaner.

Another good read to while away an hour or two!
Had heard of (but never seen) the ONE-71 engine, apparently a few built for lighting plants for both military as well as domestic.
I assume they were also supercharged?
2/71 I recall as being fitted to Euclid S7 scrapers as rear mounted elevator drives, 3/71 as crane engines (amongst many other applications) on P&H mobile cranes (6/71 in P/mover).
John.K. wrote "Actually a GM wont run backwards,because the blower is going the wrong way.....". had heard many stories especially of A/C clutch drive dozers when the got up against the point of stalling and the operator not being quick enough to pull the master clutch in, went over centre and took off.
Thought that the whole idea of the "emergency stop" control on the 8V71's and even the 671's was to slam shut the flapper valve in the blower air box to stop that??
Had seen the resultant mess made after an 8V71 had supposedly ran backwards for long enough to blow the hat off the air cleaner and just about empty the sump, before being stalled with the emergency stop unit.
Don't know enough about them as far as the mechanics of them, whether they could or couldn't. Noisy buggers to drive especially on those early cabover imported units where the exhaust came out the drivers side.
Must have been doing something right, made a cupla million of 'em.
Dave

The flap you mention on the blower is to stop it if it runs away
Detroit's are prone to this due there injector design
Many (most people) say that the rack is stuck and this isnt the case

One injector or more is stuck

Many pull a rocker cover and check if the rack is stuck on a motor if it has been sitting for some time

This also wont have any effect on stopping a run away

Most people have very little understanding of how these motors actually work and how and why a run away is caused

Paul