Injector trouble

[john_bud]

The area you are describing is on the pressure side, not possible to suck air there. I agree with the others, non responsive throttle point to fuel, air, etc.

Robj is 100% correct. Lines after the pump are pressurized and it's IMPOSSIBLE to get air leaking into them. You may have a loose line, cracked line, loose or bad fitting between the tank and the pump. Check those.

The type of fittings are positive seal onto a machined surface. Use of Teflon tape or Teflon goo will do more harm than good. Tighten any loose fittings and replace any leaking lines between the tank and the pump.

Read OldMech's advice closely. Now read it again. Maybe write it down. Do those things. He has given you some good advice.

I tell ya, if you were close we'd get that rascal running. Don't despair you are almost there!

jb

 

[DennisStahley]

Robj is 100% correct. Lines after the pump are pressurized and it's IMPOSSIBLE to get air leaking into them. You may have a loose line, cracked line, loose or bad fitting between the tank and the pump. Check those.

The type of fittings are positive seal onto a machined surface. Use of Teflon tape or Teflon goo will do more harm than good. Tighten any loose fittings and replace any leaking lines between the tank and the pump.

Read OldMech's advice closely. Now read it again. Maybe write it down. Do those things. He has given you some good advice.

I tell ya, if you were close we'd get that rascal running. Don't despair you are almost there!

jb

Hi JB

Well its not to far to my place from WI. To Fl. (ha ha 0 tell ur wife yall need to get out of there for a couple weeks and come to FL. the weather is great and we have room for yall to stay and we can get this thing running she will think we are crazy and I am beginning to wonder myself
I wont use the teflon tape and I will try what oldmech has said. I am going out of town for 2 weeks so when I get back I will give this a go and see what happens.

Dennis

 

[DennisStahley]

Dennis
I am in Africa at the moment so can not look at my Kubota, however the check valve I had a problem with was on a 580C Case it also returns to the tank, however if you follow the line back it has a connection at the pump as well. This is where the check valve I am referring to was located.

As for the fuel leakage you are seeing between thye pump and the injectors it should not leak however it will not suck air.

It is hard to imagine that the problem is air as after 10 minutes of operation the system should be completely bled.

Durring the 10 minutes that it was running well was it responsive to throttle input?

Mark

Hi Mark
Yes it was responsive some what had to keep playing with throtle to keep it going but once it ideled like it should and ran quite good I even went in the garage for a few minutes and it ran fine all the time about 5-6 min then I think it sucked air from somewhere and started to act up and had to play with throtle again. I see what you mean on it not sucking air at injectoe line it was a little wet with fuel. Yes I would have thought after 10-15 min. running all the air would be out but I think it is sucking somewhere. there is not to many places it can suck as it goes from tank to filter I blead then to injection pump which I blead then to the injectors and everything seems to be tight as I have really tightened them all up so I sure dont know where it is comming from ? Do you think with only 200 psi compression that it is giving me this problem??

Dennis

 

[DennisStahley]

Hi! My opinion! First Check fuel flow at the filter Drain it for remove water you must to have a good flow of fuel. Second look for find a plug for drain the fuel pump injection again you must have a good flow of fuel. Third You must replace or change the cracked line IMPOSSIBLE to repair. Very high pressure over 2400 PSI. Forth You MUST remove the air in all injector lines. the best way You need a helper for start the motor when in same time you loose the nut at the injector line when you have a good flow with no air you tight the nut. you make all injectors. Fift Kubota are indirect injection you need GOOD GLOW PLUGS . You heat Glow plugs for one minute or more . I think you are near . Good luck! Oldmech

Hi Oldmech.

Isn't the weather up there cold?? and don't you need to get out for a couple weeks and come to sunny Florida??? We have a room all ready for you and wife just tell her it is going to be a honeymoon ( ha ha ) I sure see you have some good advice and I have taken it and I am going out of town for 2 weeks and when we get back I will try your steps. I will have my lap top with me so if you think of anything else let me know. Its great you guys are so helpful with your help I have got the thing running just have to keep it running next.

Dennis

 

[gemini5362]

If you can get it running for fifteen minutes then the compression is going to be ok enough to run. If the compression is too low then it wont run at all. When you loosened one of the lines and the engine dropped down that is good that means that cylinder is firing. I would do that to all the cylinders and see what the results are. At one point in this post someone mentioned something about taking something off of the injector pump to see if it was stuck. Did you do that ? I agree with the other posters you are almost there. If it runs fifteen minutes then starts acting up it sounds like air or fuel problem. Make sure all your fittings are tight like you have been advised check the lines between the tank and the injector pump. especially the lines going into and out of the fuel pump, fuel filter, fuel shutoff if you have one. You might not have had all the air bled out of the fuel filter You might try starting it and keeping it running again. If it is idleing by itself you are getting closer that is for sure.

 

[oldmech]

Dennis I thanks you very much for your invitation. I think your engine is missing fuel at the fuel injection pump. Do you have change the fuel filter.(We must change fuel filter yearly at least) Is your motor have a fuel pump between tank and fuel filter?I think you have not If you have you must start engine for check fuel flow. Look Disconnect the fuel line input at the injection pump you must have a good flow of fuel wait many minutes if flow stop or go very few you have a problem between tank and fuel injection pump. may be the filter I think you can have a filter in tank also. Look the cap of your tank. Loose it air must go in tank . We always bleed or remove air at injector when we work on filter , pump fuel injection lines and injector. Good luck! Oldmech

 

[mopacman]

Dennis I went down and checked my L245DT. The throttle and fuel shut off are the same lever on the injector pump. There is a lever mounted on the transmision by the brake peddles, when you pull this up it pulls the injector pump lever back and shuts the fuel off. The throttle pushes the injector pump lever forward to increase fuel. Make sure the fuel tank vent is open. Try running it with out the fuel cap on. I have seen this kill an engine in about 10 minuts it could also cause air to suck into the fuel pump.
Larry

 

[DennisStahley]

Dennis I went down and checked my L245DT. The throttle and fuel shut off are the same lever on the injector pump. There is a lever mounted on the transmision by the brake peddles, when you pull this up it pulls the injector pump lever back and shuts the fuel off. The throttle pushes the injector pump lever forward to increase fuel. Make sure the fuel tank vent is open. Try running it with out the fuel cap on. I have seen this kill an engine in about 10 minuts it could also cause air to suck into the fuel pump.
Larry

Hi Larry
I see the levers you are talking about and I understand this now,and as for the fuel cap that is a thought I will have to check this out it could be just that. I will let you know when I get back home and check it. Thanks for the tip I appreciate it.
Dennis
You dont have a picture of your set up of the injector pump and the injectors that shows the fuel lines how they are run do you? If you do could you send it to me that would be great.

 

[DennisStahley]

Dennis I thanks you very much for your invitation. I think your engine is missing fuel at the fuel injection pump. Do you have change the fuel filter.(We must change fuel filter yearly at least) Is your motor have a fuel pump between tank and fuel filter?I think you have not If you have you must start engine for check fuel flow. Look Disconnect the fuel line input at the injection pump you must have a good flow of fuel wait many minutes if flow stop or go very few you have a problem between tank and fuel injection pump. may be the filter I think you can have a filter in tank also. Look the cap of your tank. Loose it air must go in tank . We always bleed or remove air at injector when we work on filter , pump fuel injection lines and injector. Good luck! Oldmech

oldmech.
Yes I have put a new filter on and there is no fuel pump etween tank and pump as it is gravety feed.and there is no filter in tank as I took tank off and cleaned it out.I will ck. the cap this might be where the problem is.Thanks for the info. I will let you know when I check it out.
Dennis

 

[DennisStahley]

Hi All
well I am back at it again after a breif illness again. I have come to the conclusion that it must be the fuel injector pump that is not working as it should. I had it running a few months ago with the help of every one on here and as you know I have put new injectors in, new diesel, new filter , new glow plugs all to no avail. The compression is 200/200/400 so as you have said it should run, it did about 20 minutes then started acting up bogging down etc. and died. I (BAD) used either to get it started its the only way it would start, there seems to be no control with the throttle peddle. I have blead it till I dont think I can bleed it any more HHA. But with it running for 20 min. the air should be all out I would think as it ran real good for the short time it ran. Question does any one know where I can get my pump overhauled?? Kubota wants over $ 500.00 for a brand new pump, but I dont have it to buy one, so hopeing I could get it overhauled at a much less cost? Or do you know where I can get a overhaul kit for it? I have spent hours on here looking for kit but have not found anything. If anyone has a suggestion Please let me know ( and not to junk it ) haha

Dennis Stahley
Bradenton Fl.
L245DT
Kubota

 

[DieselPower]

Umm, is that a typo error or is the compression really 200/200/400? If it's not a typo that is probably your problem. If it is correct then the two cylinders with 200 PSI are more than likely your problem. Cracked head or blown head gasket would be the likely culprit's.

 

[DennisStahley]

Umm, is that a typo error or is the compression really 200/200/400? If it's not a typo that is probably your problem. If it is correct then the two cylinders with 200 PSI are more than likely your problem. Cracked head or blown head gasket would be the likely culprit's.

Ok so ya think its the cyl.? Yes that is the correct readings but others on here said if it ran it should be ok? But I guess if the compression is that low maybe it can't start on its own? It ran great when it started for about 20 min. and then faltered, but no smoke of any kind, neither white,black,or blue smoke. The Kubota dealer said it might be the head gasket also between the 2 cyl. thats why it might have low comp. on them? I guess my next step should be to take off head and check for a blowen head gasket, never done this before on a diesel. Is there any way to check without tearing it down to see if it is the head gasket? Any input will be gladely taken.

Dennis

 

[gemini5362]

I am not a diesel mechanic and there are others here but could he not take another compression tester ( borrow one from a parts store) put them in take compression readings from both and see if they equalize out after a few minutes. Not sure if you can get all valves closed at the same time or not but if you can should see pressure in one cylinder go down while the other goes up

 

[john_bud]

With the injectors out, you can buy or make an adaptor that allows you to use compressed air to pressurize each of the bad cylinders. Do that when at TDC on the compression stroke. Do it in a quiet place. Listen for the whistle of escaping air. If it's in the other 200 psi cylinder - they are leaking together. Either head gasket or a crack.

Other places to observe are the intake manifold, exhaust manifold, oil galleries and radiator.

You want NONE in the adjacent cylinders (cracks or blown HG), radiator and manifolds (leaking valves) and as little as possible from the oil galleries (blow by past the rings).

 

[RichNJKubota]

I don't have much experience with diesel engine diagnosis but 200psi sounds a bit low to me.

 

[DennisStahley]

With the injectors out, you can buy or make an adaptor that allows you to use compressed air to pressurize each of the bad cylinders. Do that when at TDC on the compression stroke. Do it in a quiet place. Listen for the whistle of escaping air. If it's in the other 200 psi cylinder - they are leaking together. Either head gasket or a crack.

Other places to observe are the intake manifold, exhaust manifold, oil galleries and radiator.

You want NONE in the adjacent cylinders (cracks or blown HG), radiator and manifolds (leaking valves) and as little as possible from the oil galleries (blow by past the rings).

Hi.
Thanks for the tip I will try this and see if I can hear any air leaking. As for blow by it is not smoking a bit, any color at all. When first started it blew black smoke but it hasent run in 3 years but it quit blowing the black smoke about 15 sec. after it started.

 

[DennisStahley]

I don't have much experience with diesel engine diagnosis but 200psi sounds a bit low to me.

Hi.

Yes I thought 200 psi was low also but some of the guys on here said that was fine? And they said if it started and ran it must be ok? I don't know if that is why it won't start by itself with out the help of starting fluid? Which I know you are not suposta use to start it.

 

[BTDT]

Pull valve cover and see if valves are adjusted correctly. My stepdad called this week and said our tractor didn't have any power. I went to see, it was hard to start (actually wouldn't start). I pulled valve cover and one of the pushrods had come out from under rocker arm. I put back and adjusted valves, started right up.

 

[DennisStahley]

Pull valve cover and see if valves are adjusted correctly. My stepdad called this week and said our tractor didn't have any power. I went to see, it was hard to start (actually wouldn't start). I pulled valve cover and one of the pushrods had come out from under rocker arm. I put back and adjusted valves, started right up.

Hi
Well I will check this out and see what I find, thanks for the tip