| Author | Message | ||
| fbatie (68.34.73.254)
Rating: N/A |
I have been told that you can't have an emergency shut-down switch on a turbocharged 8v92. Is this wright or wrong? If wrong what do I need? | ||
| RJ Long (Rjlong) (24.127.74.29)
Rating: N/A |
The turbocharged 2-cycle Detroit Diesels do not come equipped with the emergency shut down system found on the non-turbocharged models. As Geoff has pointed out on this and other bus bulletin boards, with the installation of spring-loaded injectors/rack, the emergency shut-down system was no longer needed. To confirm, contact your local DDA dealer. HTH, RJ PD4106-2784 Fresno CA | ||
| Mike Stabler (Docdezl) (64.255.109.206)
Rating: N/A |
"IF"....YOUR engine "runs away" because of a portion of the rack sticking or and injector stickes. Then you do not need an AIR STOP! There is only one problem. This is a compression ignition reciprocating piston engine. "GOT FUEL" There are as many ways for this engine to get an "unmetered supply of fuel" from a pump that might have a teeny little problem. Plugged fuel return line. Stand and just look at your engine and "think" sip that beverage and think. It has at least a hundred ways to get its hands on that engine oil ie see fuel. IT'S looking at the blower seals right now!!! I am and advocate for a fuel SHUT OFF. An inline electromechanical,ball valve or a bull hammer! I have seen all- ALL- engines run away, one with propane/gas and a choo choo train(4 injectors per cylinder) eat your heart out. Never saw a Lawnboy run away but it is possible! smoke,rattle&,stink.....docdezl | ||
| FAST FRED (209.26.115.63) Rating: N/A |
AM told the usual death of a DD that was used far too long on the oil patch, is the High Speed Runaway. The rings get slopy & broken enough that even with ether its hard to start warm. Then the rings will begin to pass enough oil for the engine to run on. Claimes that they will go 4 or 5 min at about 4000 RPM (with the crew running to hide behind heavy metal things) before she blows, from eating all the lube oil. The FLAP valve was to stop those style explosions , as well as a stuck injector. AS the DD 2 strokes are being phased out , there running more engines to DEATH. FAST FRED | ||
| TomNPat (66.82.9.32)
Rating: N/A |
Had an International DT466 blow a turbo and continue running after fuel shutoff because it sucked oil from turbo lubrication. Didn't run away though, and stopped it by putting it in gear and applying clutch and brakes. Kinda hard to do with a 'slush pump', huh Fred? Wonder if turbos on detroit could provide similar source of oil regardless of ring condition? TomNPat | ||
| Phil (204.89.170.126) Rating: N/A |
My Dodge truck with a Cummins had a note in the owners manual that if teh engine ran away due to a turbo seal leaking you should spray a CO2 fire extinguiser into the air intake. | ||
| Ben Mallon (68.1.245.13)
Rating: N/A |
I used to work in the missile field in North Dakota. Our below-ground generator set was powered by a 6-cylinder Caterpillar. All set up with self-feeding lube oil aux tank and I think 14,000 gallons of diesel, so it could run unattended at max rated power for three months plus. One day a team was trouble-shooting one of these and it ran away on them. The nearest technician tried closing off the air intake with a 4" thick Air Force Technical Order. This was gobbled up page by page and I think they had to close the fuel valve between the big storage tank and the engine, then let it starve for fuel. I don't know what they would have done if it started feeding on it's own lube oil. I think the feeder tank held about 250 gallons. You know the difference between a war story and a fairy tale? One begins "There I was, and this is no bull..." The other one begins "Once upon a time..." After that, they're about the same, at least as far as factual content. Ben Facility Manager, Hotel Zero, about 5 miles north of Michigan ND. | ||
| Stephen (24.121.36.96)
Rating: N/A |
Can someone explain Fred's story to me  On the 8v92TA that Bluebird installs, they give you a mechanical cable to cut off engine. The reason cited: What do you do when your air pressure is down? You turn on the engine to build air pressure... but then how do you shut off the engine? That is why the mechanical cable. I'm not sure if it cuts off fuel or air. |