I just purchased a L185 for a "project" from my neighbor. It has been sitting in the field for a bout a year and a half since it was last running. It appears I am not getting any fuel into the cylinders or out of the injection pump. My question is concerning the injection pump. Can they get "gummed" up like a gasoline carb might get? Can they be cleaned? Do they go bad? Can you rebuild them? How do I know for sure that the injection pump is not working?
l185 injection pump
- Thread starter rhkc
- Start date
I don't know that injection pumps would gum up or not. The first thing I would do is check your fuel shut off vavle, then make sure you are getting fuel to the filter. It would not hurt to change the fuel filter and bleed the system anyway. To check if the injection pump is working I have always cracked the lines loose going to the injectors, while cranking the engine over; to see if I had fuel there.
Good luck with it,
Robert
Good luck with it,
Robert
Thanks for the information Robert. I have disconnected the lines from the top of the injection pump with nothing happening and the fuel is getting to the filter and I have a new filter on it. I have also removed the side cover and can see the fuel camshaft turning. I can only assume there is something wrong with the pump. Is there some cleaner I can shoot in there? Is there a manual for diagnosing the pump?
oldtown
New member
Equipment
L175, 1977 model . caroni finish mower , first choice tiller 6 scrape blade
First get fuel to the inlet side of the pump, then it usually consists of turning the engine over to get fuel to the injectors. When I got my L175, we ended up pulling it with a pickup while bleeeding the injectors. Of course if you have a good battery, you probably won't have to use the chain start option.
It was such a PITA that I check the fuel level before starting every time. I do not want to have to bleed the injectors again. Why Kubota didn't put a manual bleeder pump on these is beyond me.
Robert
It was such a PITA that I check the fuel level before starting every time. I do not want to have to bleed the injectors again. Why Kubota didn't put a manual bleeder pump on these is beyond me.
Robert
Okay. I have bled the system up to the injector pump. When I get to the injector pump there is fuel bubbling out of the left side but nothing on the right side. (2 cylinder engine). I removed the injector pump and removed the upper portion of the pump. (delivery valve holder thru to the pump element). I then re-installed the pump. At this point I had fuel bubbling out of both sides of pump. I then bled up to injectors. The engine started and ran for about 15 minutes and then cut-off. I looked at the injector pump and again nothing out of the right side. I assume there is a problem with the pump and it will need to be re-built. How can I determine what type of pump it is and where can get a manual for it? Is there any reputable place I can send it to be re-built? I am not familiar with diesel engines and it has been very frustrating not being able to diagnose the problem. Thanks for any help from anyone.
Rick
Rick
pat331
New member
Equipment
L35, mower, bushhog, cement mixer, grader, boxblade, forks, posthole digger
Rick, If it ran for 15 mins., then stopped, I'd look for trash in the line or maybe the new fuel filter is stopped up, especially if the tractor had been sitting for 1.5 years. Diesels don't like dirty fuel and won't tolerate water either. Keep us posted! Good Luck!
I (we) are making progress!! WoooHooo! I took off the injection pump - again and cleaned - again! This time it seems to run okay when I can get it started. The problem now is starting and staying running at high speed. When you start this tractor you are supposed to have it at full throttle but having it at full throttle throws the engine to high speed and shuts the engine down. The "control rack" or speed control on the injection pump gets jammed at the high speed position. I then have to remove the injection pump cover and, with a screw driver, pry the speed control back to a free moving position. After doing this once or twice, I can start feathering the throttle down and get it started. This also happens once the tractor is running and you apply full throttle. Again, the speed control gets jammed in the high speed position and shuts the tractor down. There is an "adjustment plate" on the back of the injection pump but I am not sure if this has anything to do with it. Any ideas/suggestions? Could this still be caused by being dirty? Thanks.
Needing to have it at full throttle to start doesn't sound right to me, I don't start my L175 at full throttle.
If the control rod is sticking in the wide open position; I would either find out why it is sticking and fix it, or adjust it until it doesn't stick.
Dirt in a fuel system can cause many problems.
Robert
If the control rod is sticking in the wide open position; I would either find out why it is sticking and fix it, or adjust it until it doesn't stick.
Dirt in a fuel system can cause many problems.
Robert
Well, I may as well throw in my 2 cents
I never have to start my 185 with the throttle wide open, in fact this will create very hard starting, from my own experiences. Also, I agree with the fact that these darn things are really hard to bleed and get going again if you run them out of fuel as my dear old mechanically challenged Dad used to do, and call me to fix it for him. Now that I have the 185, it is written on the dash to check the fuel before starting. For those, (ie: my son-in-law) that don't comprehend how hard these machines can be, (most times!) to restart after fuel run out.
As for the injection pump. I've never had to touch it. Knock on wood!
Good Luck - may the fuel stay with you!
I never have to start my 185 with the throttle wide open, in fact this will create very hard starting, from my own experiences. Also, I agree with the fact that these darn things are really hard to bleed and get going again if you run them out of fuel as my dear old mechanically challenged Dad used to do, and call me to fix it for him. Now that I have the 185, it is written on the dash to check the fuel before starting. For those, (ie: my son-in-law) that don't comprehend how hard these machines can be, (most times!) to restart after fuel run out. As for the injection pump. I've never had to touch it. Knock on wood!
Good Luck - may the fuel stay with you!
aquaforce
New member
Equipment
L245DT FEL, JD450 Track loader, 5' scrape blade&mower, 5x10 trailer, Dump truck
I have had the rack stick in the shut off position on my L175 (same pump) but never in the full fuel position.
Like Vic said, those two springs have to be in place properly!
I had to clean up my pump rack from moisture causing a sticking symptom in the off position but since my full rebuild of the engine it has been flawless for the last 10 hours.
Like Vic said, those two springs have to be in place properly!
I had to clean up my pump rack from moisture causing a sticking symptom in the off position but since my full rebuild of the engine it has been flawless for the last 10 hours.
thank you for all the posts! I have finally figured out why it was getting stuck in the high speed position and it was my own doing! When I first got the tractor the injection pump was completely jammed with old fuel. The speed control rod would not even move. In the process of cleaning I would tap the speed control rod one way and then back the other way. In doing this I was peening over the edges of the rod. It was not enough to keep it from going into the guide cylinder but it was just enough to get it stuck in the guide cylinder. I filed/sanded the edges and now it works great! I could not have gotten this far without this forum and the posts! Thank you!