Stuck Tractor on Large Stump

[9973720wb19]

my first thought was that i know these modern tractors have a safety shut off fuel switch that will shut the fuel flow off for safety if the tractor rolls over or gets too inclined...?

anyway, glad it all worked out...live and learn and we all do

 

[scrimshaw33]

Filled tank and bled 6 times still won't turn over. Is this normal? How many times should I do this ? Everytime I bleed it gas is coming out along with bubbles. I'm afraid of flooding engine. Anything else it could b or should I keep bleeding it?

 

[homedad]

The OP said When I turn the key the engine wants to turn over but it won't (all the electrical works). If it a steep angle could you be getting oil into the cylinders and creating hydro lock? If that is possible, pull the injectors and check it. Or check for a loose ground. I've had things shift and loosen the neg cable at the battery.

 

[k0ua]

Filled tank and bled 6 times still won't turn over. Is this normal? How many times should I do this ? Everytime I bleed it gas is coming out along with bubbles. I'm afraid of flooding engine. Anything else it could b or should I keep bleeding it?

Just so we are all sure on what you mean by "turn over" You do mean dont you that the engine will crank over when you turn the key, and it will crank at a normal rate but the engine will not run right? Because if you mean the engine will not crank or "turn over" then that is a whole different problem. Please be specific, as it really helps to diagnose the problem. Remember we are thousands of miles away, and it is very difficult to see and hear what you are seeing and hearing. I dont think you could "flood" the engine by the bleed procedure. the idea is to remove the air in the lines. remember it has no carb or float bowl just an injector pump to inject high pressure diesel fuel directly into the combustion chambers and usually a "lift" pump to take fuel from the tank to the high pressure injector pump. I am no diesel mechanic by a long shot, but there are diesel mechanics on this board, and if we can give them the best information we can then the chances of getting this fixed by "remote control" are very good. Thanks

James K0UA

 

[scrimshaw33]

Correct it cranks but engine won't start. When bleed line have done 20 times air coming out w fuel does that mean still need to bleed or is it normal to bubble when line is bled.

 

[teg]

If you've done this 20 times and air is still coming out... I wonder if the fuel line as a hole in it?

 

[Short Game]

I'd do a thorough inspection of the fuel line runs. I've had a stick come up from the ground and break or crimp a line before.

 

[teg]

Bottom line, You should not have any air in the line... just fuel coming out.

 

[tmajor]

JD 4520
Safety:
Operator Presence System that will shut the tractor off if the operator leaves the seat while the tractor is in gear.

I'm not sure of any other safety systems or how they work on this model tractor.

Add: Fuel System
Type Direct injection

Injection Pump Type In-line with electric shutoff. ?? Blown fuse?

 

[blueriver]

First let me congradulate you for your wife letting you back out to play today !!!!

Got to be something giving the system air, think about what happened right before, during and just after ... the smallest air intrusion can cause problems.

I hope you get her going.

 

[scrimshaw33]

I joke about the wife letting me go play but it's true--my time on the farm is limited If you all know a secret to getting permission more often let me know!

Tried about 100 times to pump and bleed the line but I kept getting diesel fuel with air bubbles coming out. Must be a hole in the line somewhere. I'm going to try to have JD come out and service it. Thanks for all the help, I'll let you know what they find.

When I filled the tank full this morning before bleeding the line, right below the "final filter water separator (where you pump and release the fuel to bleed the line of air), there's a 1 inch diameter line that was leaking dripping fuel. I'm not sure if fuel dripped from the final filter water separator onto this line and appeared to be dripping fuel, but it did appear the line was slightly bubbling (only when the fuel tank was filled all the way).

So right now I'm guess there's still air in the line or possibly a break in one of the fuel lines somewhere. I was hoping it'd be an easy fix as I'm not capable of doing much anyway, but it looks like it's going to get serviced. Just hope they can do it in the field as it's in the woods and I don't think it will be able to be removed otherwise

 

[scrimshaw33]

Thanks fir everyones help. Service dept came out today and found the problem: there was a very very small crack in the end of the fuel line . He cut about an inch off and bled the line which produced zero air bubbles. Then he had to jump the battery. After a few series of bleeding line we were able to get her started. I was very close to fixing myself...maybe next time!!!

 

[teg]

Glad to know we were on the right track :thumbsup: So basically, it was unrelated to the stump???

 

[Fordman1981]

Glad to hear your back up and running happy tractoring

 

[scrimshaw33]

I'd say it was probably related to the stump. Everyone helped, but "teg" you were right on the money in bleeding the line. That's what really allowed him to diagnose what was going on and you were the first one to mention it. So thanks. Even though the stump wasn't resting on the line, it had to have cracked it somehow since the tractor sputtered out as soon as I ran over the stump.

 

[Short Game]

Or this:

I'd do a thorough inspection of the fuel line runs. I've had a stick come up from the ground and break or crimp a line before.

 

[k0ua]

glad you got it going.

James K0UA

 

[attaboy]

Not really but I have a guage that reads empty when it's only half empty. So the fuel gauge could be giving a false reading...

Fill it up, before you go out to work .. or play. And if you have the energy, top it off when you are done for the day .. reducing volumn in the tank .. reduces condensation area inside. That's generally where your water comes from. Just like airplane engines ... water is not condusive to undisturbed operation

This has happened to me with several machines over the years .. and I am sometimes pretty aggresive on occasion, in regards to machine attitude .. that is .. the angle in relation to level ground. Your climbing over a stump may have been similar. Water will collect .. almost unavoidable .. and since it's heavier than diesel .. will look for your fuel tank outlet ... murphy's law

These things just won't run worth a darn on water. Not familiar with your machine .. have 3 Komatsu's here .. all have water drains as stock from the factory ... just gotta remember to use them .. hehehe.