Ford 1700 mixed up intake and exhaust

[bunt]

Was out smoothing out some trails on my property and not going very fast, gears were 2 + 2 in AWD , using bucket to smooth out some hazel bushes when tractor seemed to cough and smoke came out of air intake and I put hand on exhaust pipe because saw no smoke and it was sucking. This ever happen to any of you, and what did happen and is there a problem. I turned off right away and sat for awhile,because so far back in bush decided to try again and started right up and away went. Later about an 1/2 hour noticed battery light on and engine temperature going up but it was the belt had jumped off. Put back on and everything still OK Oil is same as before only have not had time to check rad as was still to warm
Bill

 

[Texas Blues]

Hmm, motor started running backwards? Its not unheard of for a diesel to do that, never read where its happened to any 1700 owners. If your belt came off when the motor reversed, it would of course get hot without the water pump and fan turning. As far as that goes, it wouldnt pump water in the reverse direction very well if at all if the belt stayed on. I suppose the alt would act up if it spun backwards as well. How high were the rpms when this happened? Did you come to a sudden stop on a stump and just about stall the motor? TB

 

[Soundguy]

alt shouldn't car which way it spins.. however... how well do you think oil travels backwards thru that system?? no sump to suck from.... not good.

hopefully it was shut off FAST.

soundugy

 

[JC-jetro]

Bill,

I'm trying to sort out your information. Did yo actually see where the needle was when you noticed the light? did you over heat? did you check the oil level before you started the tractor after 1/2 hr? how does your fuel filter looks like? did you have enough diesel in the tank? where you on an incline causing the fuel to shift causing the fuel pump to belch if you were low on fuel?

Do yo know if you inadvertently move the key to 12 o'clock (Straight up) while the tractor is running the light will come on and the temp needle creeps up to high without over heating.

so your belt came off without any damage and you were able to put it back on right away.. is that a true statement?

I'm reaching here but can see the likelihood key switch moving and you had a hick up with your fuel system injecting some water and diesel mixture giving your engine a reason to belch and hesitate.

Give us a bot more info and we might be able to crack it.

Jc,

 

[Texas Blues]

Man, soundguy thats a good point. I didnt even think of the oil pump action. Hopefully, if it in fact ran backwards, he shut it down quick. I had wondered if he had valve issues, but he said it restarted and ran good after that. TB

 

[bunt]

rpms were about 1500 in gears 2 and 2, throtel lever was set to just above stall. engine was lugging when it hesitated backfired. Ran for approximately 20 seconds, because I could see smoke coming out of intake pipe and put hand over exhaust and it almost stalled. Belt was easy to put back on on the small 2cylinder, just two nuts to loosen, 1/2" socket and old wooden hammer handle to pry with to set tension. Oil level good, water level good, fuel filter looks clear. Was on the flat ground and the fuel level was full at start of use , I top up everytime I use the tractor, Fuel was probably 8 months old. I do use a kleen flow additive for water or gelling has it gets down to -25 in winter. I did not see the needle or should I say I do not remember where the temp was at but sure no battery light was on. I had checked the oil before restarting but did not see the belt off, Started tractor and moved about 200 ft and seen red light come on and steam, not much so shut down again. Saw belt this time, walked up to house about 1/4 mile and got tools, put back belt, checked everything out except antifreeze coolant level, heat gauge was down to three quarters started and fell to normal right away. Drove to house shut down let sit for half an hour and checked coolant, OK only thing I have not checked yet is the air intake filter system. Started again today after plugged in as is minus 2 celceus today or around 29 farehight. Thank"s for the comments was working the last few days trying to get ready for winter, weather here has been the pits, rain rain rain rain. Almost fell over backwards yesterday because saw this big orange thing in the sky for a few minutes, took awhile to remember that it possibly could have been the sun, ha ha
again thanks hours on tractor are 1999
Bill

 

[Soundguy]

I have heard of diesels running backwards.. but newver seen it myself.. but agian.. have heard limited accounts of it.

soundguy

 

[JC-jetro]

I wished someone could explain diesel running backward thing. I can't see how that could ever happen with gas engine and ignition system.

Can see if there is fuel vapor in the cylinder on compression stroke the heat of compression igniting the fuel irregardless of engine rotation but how can it continue?

Well, It appears all is well and that's a good thing Bill, but what happened?


JC,

 

[bunt]

Yes I am glad also that it is OK, did talk to one older guy and he had heard that it was not unheard of with single cylinder diesels such as in the older inshore dorie fishing boats. Well thanks for the information and if anything further develops or I learn more of what happened I will post it. Still trying to borrow a camera to take a picture and post it here. Thank you for all the in-put
Bill

 

[AndyG]

rpms were about 1500 in gears 2 and 2, throtel lever was set to just above stall. engine was lugging when it hesitated backfired. Ran for approximately 20 seconds, because I could see smoke coming out of intake pipe and put hand over exhaust and it almost stalled.

There is nothing wrong with your tractor but the operator could improve a little. The conditions that you described are exactly what I had in mind when I started reading this. This problem was much more common with 2 stroke Detroit diesels in trucks. The driver would stall the engine in a heavy pull and, if conditions were right, the engine could start running backwards.
Gas engines won't run backward because they suck the fuel in through the intake valve and exhaust goes out the exhaust valve. If you turn it backward it will be sucking though the exhaust valve. Since there is no fuel source in the exhaust system the engine will not start. Diesel engines only suck air through the intake valve. The fuel is added directly to the combustion chamber by a separate injector nozzle. If you turn the diesel backward it will still suck air in through the exhaust valve and the fuel was still added by the injector nozzle. The engine had air, fuel, and compression so it started. I would not expect the injector pump to work turing backwards on all diesels so this may not be possible with a lot of engines.
There are some things that you need to do to prevent this from happening again. When you are working the tractor run the engine at its rated speed (wide open throttle on most tractors). The people who designed your engine chose that RPM because it will give the best fuel economy and make the engine last as long as possible. Your engine has a governor that will maintain that speed... let the governor do its job. Lugging the engine is pretty hard on it and could reduce its life. Think about chosing the right gear to get the ground speed that you want instead of adjusting the throttle. It the engine is lugging down (200-300RPM?) then shift to a lower gear. You do not have to be running wide open when you are just putting around but give it soem more throttle when you start working it. Its kinda hard to believe, but you will put less wear-and-tear on an engine that is running at its rated speed than if you lug it a lot. I started running heavy equipment (backhoes, dozers.....) at a young age. I was instructed to push the throttle wide open in the morning (after warm up) and leave it there all day. This advice has served me well and I think that it will work for you to.