| Author | Message | ||
| CoryDane Rating: N/A |
Well, the engine ran a few months ago but today, it just turned over. Normally, just a touch of the key and it is running. I tried to prime the filters, thinking the filters lost the prime. I noticed that when I was trying to put the diesel into the primary filter, there would be a pressure built up. Thinking I was putting the diesel in the wrong area, I opened the Secondary and saw some of the pressure come out. I pumped on about a gallon, more or less and tried to start the engine, no start. The emergency door to cut off the air in case of runaway was open, in normal position. Sorry guys, I was an electrician, not a mechanic so I am probably asking a really basic question. Any ideas or help is appreciated. CD | ||
| dave4106 Rating: N/A |
you have to prime more than just the filters. disconnect the return line, right next to the feed line up above, and run 12volt pump until fuel is comming out return. that wasy you know the whole system is charged. also be carefull not to use a pump with to much pressure, like something designed to run electronic fuel injection. you could blow the seal out of your fuel pump. i would also check before priming, your supply line check valve, also up above, right, in engine compartment. good luck | ||
| kevin schooler (Sylverstone_pd4501864)
Rating: N/A |
8v71'a are simple. 1) clean air 2) clean oil 3) clean fuel i'm assuming it turns over but won't start. if you're batteries are spinning it fast enough, you don't have fuel, or the pump lost it's prime. my scenicruiser did that until i put in an electric fuel pump between the tank and the filters. what i would have to do is make sure the filters are full, then a shot of ether in the air intakes, and let 'er rip. if it starts and then dies, it's not getting fuel. if you know you have enough fuel in the tank, you may have to do it a few times to get the pump to prime and for the engine to stay running. the 8v71 is nice in that the injectors will bleed themselves so you don't have to do too much major stupid stuff to get her started. good luck  -dd | ||
| Sammy (Sammy)
Rating: N/A |
Cory, remove both fuel filters,fill them with fresh diesel fuel,and install them. Make sure your batterys are fully charged and engine cranks over at normal rate. Look on top of the governor cover - there is a fuel control lever that controls the fuel racks. It is a cast piece of metal shaped like a wide half moon. It is actuated(pushed) by an air operated small cylinder mounted on the governor cover.Make sure it's not stuck in the "no fuel" position - shaft of cylinder extended. Sometimes these cylinders get stuck after sitting for long periods of time - shaft gets rust on it.E-mail if you need more help. Best of luck. Sammy | ||
| Edward J. Sommers (Sommersed)
Rating: N/A |
(In the lines below, where I have used the word petcock, I mean fuel shutoff valve!) I just changed my filters on friday and had trouble starting afterwards, but it was due to my own boo boo but may (or not) help you. My MC5A has a petcock on the supply line that I closed prior to opening up the filter canisters, anyway, after changing the filters and priming the system She started right up but promptly died-- I had forgot to open the petcock! So I opened the petcock, primed again, and then again without being able to get it to even pop. As I was driving back to the truck stop here in Hawthorne, NV to get more diesel to use to prime I happned to think about that damn petcock and when to open and close it. Upon return with additional diesel (4 gallons), I closed the petcock again, primed again but felt a definanate pressure I did not feel before. when the pressure was fairly strong on the primer bulb I was using I opened up the petcock again and she started right up! I suppose it depends on where the one way valve, or valves are on your rig. Ed | ||
| CoryDane Rating: N/A |
((( there is a fuel control lever that controls the fuel racks. It is a cast piece of metal shaped like a wide half moon. ))) Sammy Are you talking about the throttle control on the left top side of the engine? It is normally tough to move anyway. Turned it over the other day, did get a wisp of white smoke but no starting. Still looking cd | ||
| Tom Caffrey (Pvcces)
Rating: N/A |
Cory, while I don't recommend a very big shot, I would give the air intake plenum a snort of ether, wait 5 seconds, then crank for up to 10 seconds. If all the parts of the engine are going up and down at the right times, and there is ANY fuel being sprayed by the injectors, you ought to get a nice little roar out of it. If you don't get any firing, then I smight sart thinking about confirming that the blower is turning over. If it's not, I don't think the engine will start. If it is turning over, then I would think that it would fire on the ether. If it starts, don't let it drop back to an idle until it is running smoothly. These Detroits often die if they have too much air in the fuel system. Good luck on running down the problem. Tom Caffrey PD4106-2576 Suncatcher | ||
| Cory Dane Rating: N/A |
I was of the understanding that EITHER was not a good choice since it does not contribute to lubrication of the cylinders and will cause wear. Someone mentioned to use WD40, which sounds acceptable since it is a lube oil, of sorts anyway. However how do you give it a snort of WD40 when it sends a stream down the air intake? Does it matter? How much damage does the either do to the cylinder rings and how many shots before the damage starts to occurr? cd | ||
| Tom Caffrey (Pvcces)
Rating: N/A |
Cory, a one second blast ought to do it, right into the intake plenum screen. It will take several seconds of cranking to reach the engine. While I don't recommend the use of ether where it can be avoided, this seems to me to be a legitimate use, so long as it's not very much. I have used ether rarely, but it has had no effect that I can tell. What you want is just enough to make it fire. More than that will cause very high cylinder pressures (loud knocks). If you go too light, it either won't fire, or it'll die before you get it running steady. If it dies, just make the next snort just a bit longer. If it doesn't fire, it won't hurt the engine, short of pumping a huge amount into it. Good luck with this. Tom Caffrey PD4106-2576 Suncatcher | ||
| Richard Bowyer (Drivingmisslazy)
Rating: N/A |
I have always been under the impression that the snort of ether, if needed, was only to be administered while the engine was turning over. This makes sure that too large a dose is not administered to one cylinder. Of course this would take two people unless you have a remote starter switch in the engine compartment. | ||
| Tom Caffrey (Pvcces)
Rating: N/A |
Richard, that is why I said in the above post to wait 5 seconds. It allows the ether to disperse, which accomplishes the same thing. The trouble with spraying while cranking is related to slow cranking. If a person is using ether when the engine is not cranking fast enough, the ether gets concentrated even when you're trying to avoid it. If you have plenty of cranking time available, then spraying while cranking will work, as well. As a practical matter, I've found that I can spray the plenum, take my time getting ready to crank the engine and then crank it after the wait. Often, cranking and spraying at the same time can be awkward. I'm also not too wild about spraying while there may be a source of ignition available. To each his own, I guess. Tom Caffrey PD4106-2576 Suncatcher | ||
| Richard M
Rating: N/A |
If you can get an air hose into your fuel tank make sure it is sealed off. Crank it with pressure in the tank it that doesn't get the ole girl running you have bigger fish to fry. | ||
| FAST FRED Rating: N/A |
"Crank it with pressure in the tank " But remember 5 psi will lift fuel 10 or 11 ft straight up , I would use under 2 psi to keep from blowing the seams of the tank. FAST FRED | ||
| Jim Connelly (Desertbum)
Rating: N/A |
I know this is basic but I had that problem and found that someone had flipped my engine shut off switches, located in the engine compartment, on my 4106 to the off position . |