Comments on: How to Bleed Kubota Fuel Injector Lines

By: chet

chet — Thu, 04 Feb 2010 19:48:16 +0000

Sorry that was a Kubota L3130

By: chet

chet — Thu, 04 Feb 2010 19:45:25 +0000

I was running my tractor it a L3130 at about 3/4 throttle pushing snow shut it down to put more fuel in and then it would not run any higher than 1200 rpm Ihave cleaned the fuel lines changed the filters dont know what esle it could be any thoughts.

By: Bryan

Bryan — Sun, 31 Jan 2010 18:31:20 +0000

I have a Kubota B2100, Ive heard a lot about this decompression knob and cant seem to find it. I have bled the injectors without success of it starting. It just turns over and coughs like it wants to star here and there. I replaced the fuel filter and still no luck. HELP.

Thanks, Bryan

By: Paul

Paul — Sun, 10 Jan 2010 00:18:16 +0000

I have a Kubota V2203 engine that has water at the injectors when I bleed them. I know I have to drain the tank, lines, and replace the filter. What do I need to do to get the water out of the injector pump, lines and injectors?

By: kent

kent — Mon, 28 Dec 2009 02:55:23 +0000

Vic, I have an older M7030 utility in a remote location with no dealer assistance available. I think it is a 4 cyl V4000 engine but not sure. I acquired the unit over the phone and later discovered that the previous owner could not get it running either. I have bled the air going to the injection pump but the injection pump will not push fuel to the injectors. The strange thing is that the unit tries to start(presumablly on the one injector that I cannot access with the wrench that I have). I have had the top cover off the injection and everthing looks clean and no evidence of water in the top of the pump. There does not appear to be a bleed screw for the pump itself. Pump plate says that it is a Mccuni precision CAV 503 1000 672590/0979AN 73942F533. I am told that one of these numbers is actually a J but pump guy would not say whether it was the 5 or the 7 that I misread. This tractor has teased me on two seperate occasion when I make the long distance trip to get it started. The fuel injection rebuilder says that it is probably low compression causing the (does not start condition) but I contend that that my be but first I must get adequate fuel to the injectors before I start pulling the engine apart. Any ideas. Thanks for the taking the time to read this. kent

By: Dennis

Dennis — Fri, 11 Dec 2009 06:47:20 +0000

I bought a used Kubota 245dt 20 years ago from a local campground. When I use it, I work it hard all day long – moving dirt, grading roads, mowing with 3 point mower deck. However, between uses, the tractor is parked for weeks or sometimes months. I do not know how many hours are on the 3 cylinder diesel motor. This old tractor (1978?) starts easy and does a lot of work.
My problem:
A steady stream of smoke is pumping out of the breather pipe on the side of the engine. It’s really bad at idle or low engine rpms. When the motor is working really hard the smoke is not as bad. I change oil/filter frequently, which helps for about a day. I’ve never touched the injectors. Do you think the rings are shot?

By: Vic

Vic — Thu, 03 Dec 2009 18:24:55 +0000

Jamie, repost this question into the forum area for the benefit of all and we can answer your questions there!

By: JAIME ROSA

JAIME ROSA — Thu, 03 Dec 2009 16:20:17 +0000

2000 L3000 DT 4 X 4 KUBOTA WITH LOADER. MY POWER STEERING DOES NOT WORK AND MY FRONT END LOADER DID NOT HAVE ANY POWER TO LIFT ANYTHING. THE DEALER SAID THE TRACTOR WAS OPERATED WITH LOW HYDRAULIC OIL AND CAUSED THE PUMP TO FAIL AND THE POSITION CONTROL VALVE UNDER THE SEAT AND INSIDE THE REAR TRANSMISSION TO FAIL. THE DEALER REPLACED THE HYDRAULIC PUMP AND THE POSITION CONTROL VALVE AND GOT THE HYDRAULIC SYSTEM TO WORK THE 3 POINT AND LOADER, BUT WAS NOT ABLE TO GET THE POWER STEERING TO WORK. THEY CALLED KUBOTA TECH SUPPORT AND THE COULD NOT FIGURE IT OUT. THE DEALERS MECHANIC TOLD ME ON THE SIDE THAT THE POWER STEERING PRIORITY VALVE/POWER BEYOND DESIGN WAS NOT A VERY GOOD SYSTEM. PLEASE HELP I STILL HAVE NO POWER STEERING AND THE DEALER COULD NOT REMEDY THE SITUATION.

THANKS FOR YOU HELP AND IDEAS.

By: Vic

Vic — Sun, 22 Nov 2009 17:50:13 +0000

Would be the injectors. Think of them like a “tap”. They are designed to “snap” open when a specific pressure is acheived. If the tip gets dirty or corroded with junk, it will remain partially open, leaking fuel causing diesel to wash into the crankcase. Personally, I would remove them, mark their location to make sure you re-install in the same place, and disassemble and clean each one. They will be “tight” so use a good quality socket and wrench when taking them apart. don’t loose anything, and reasseemble in the exact same order. Pay attention to the pintle tip area, this is where your problem will be. If you drop one of the injectors when it’s out and it hits the exposed tip, you’ll be replacing all three with new ones. Wash them out well with carb cleaner and a small bottle brush, make sure they are clean as a whistle.Re-install and see if that doesn’t solve your problem first. If you desire, once cleaned, take the injectors to a local diesel shop and have them check the spray pattern and opening pressure. They’ll be able to tell you in a second if they require replacing based on that pressure test.

By: Rich

Rich — Sun, 22 Nov 2009 17:21:29 +0000

Where can I buy these? Would it be the pump? or just the 3 injectors? Thanks, Rich