ih574
New member
- Joined
- Nov 24, 2007
- Messages
- 7
- Location
- Shenandoah Valley, VA, US
- Tractor
- International IH574, Earthforce EF3
I have a Kubota D1703 3-Cylinder (in an Earthforce backhoe - same engine in an L3400 and L35). Today, it lost power and stalled. It was pretty low on fuel. So I refueled with 10 gallons of fresh fuel. Started back up but within 10 seconds was stalling again. I figured I should bleed the lines like I do in my International 574. I opened the bleed port on the Second Fuel Filter, cranked the engine, and waited till I got some spurts of fuel. I tightened the port and retried. But it still wouldn't start.
For reference, here's the way I think the system works (Tank to Injectors):
1. Fuel Tank Line to First Filter (course).
2. First Filter (course) to Thing-on-Side-of-Engine-under-Injection-Pump.
3. Thing-on-Side-of-Engine-under-Injection-Pump to Second Filter (Fine).
4. Second Filter (fine) to Small Thumb Valve on Injection Pump
5. Small Thumb Valve on Injection Pump to Injection Pump
6. Injection Pump to Injectors.
Here's what I did next. I drained the first filter (course) with a small glass bowl. Had lots of water (I think - it was clear, minimal smell, and not too oily, but I didn't taste it!). Put that back together. No start. Next I checked the line from the First Filter back to the tank. Blew air all the way to the tank. Reconnected and still no start. At this point, I couldn't get fuel to fill the First Filter nor could I get any fuel to come out of the Second Filter bleed port. Next, I drained the Second Filter. This had mostly fuel. Put it back together. Still couldn't start nor get fuel to the bleed port. I next checked each hose, blowing back towards the tank. All hoses up to the tank-side of the Thing-on-Side-of-Engine-under-Injection-Pump were clear back to the tank. When I blew back towards the tank on the Injector-side of the Thing-on-Side-of-Engine-under-Injection-Pump, it was blocked. It seems the Thing-on-Side-of-Engine-under-Injection-Pump was blocking my air pressure (mouth power through a tube).
I reassembled all hoses and left the Injector-side hose from the Thing-on-Side-of-Engine-under-Injection-Pump open, thinking that it was a fuel pump. When cranking, still no fuel from the Thing-on-Side-of-Engine-under-Injection-Pump. That's why I am not getting fuel to the Second Filter bleed port.
What is the Thing-on-Side-of-Engine-under-Injection-Pump? There are no electric wires to it. It seems to enter the side of the injection pump. There is a small, spring loaded lever on the side of it, but it doesn't seem to have any effect. Is it a fuel pump? A mechanical fuel cut off valve? Does a L35 or L3400 have a fuel pump somewhere else that I've missed?
I've used a few too many words to explain this, but wanted to be as clear as I can. Thanks for any ideas or experiences with this type of fuel system.
r-
Tom C.
For reference, here's the way I think the system works (Tank to Injectors):
1. Fuel Tank Line to First Filter (course).
2. First Filter (course) to Thing-on-Side-of-Engine-under-Injection-Pump.
3. Thing-on-Side-of-Engine-under-Injection-Pump to Second Filter (Fine).
4. Second Filter (fine) to Small Thumb Valve on Injection Pump
5. Small Thumb Valve on Injection Pump to Injection Pump
6. Injection Pump to Injectors.
Here's what I did next. I drained the first filter (course) with a small glass bowl. Had lots of water (I think - it was clear, minimal smell, and not too oily, but I didn't taste it!). Put that back together. No start. Next I checked the line from the First Filter back to the tank. Blew air all the way to the tank. Reconnected and still no start. At this point, I couldn't get fuel to fill the First Filter nor could I get any fuel to come out of the Second Filter bleed port. Next, I drained the Second Filter. This had mostly fuel. Put it back together. Still couldn't start nor get fuel to the bleed port. I next checked each hose, blowing back towards the tank. All hoses up to the tank-side of the Thing-on-Side-of-Engine-under-Injection-Pump were clear back to the tank. When I blew back towards the tank on the Injector-side of the Thing-on-Side-of-Engine-under-Injection-Pump, it was blocked. It seems the Thing-on-Side-of-Engine-under-Injection-Pump was blocking my air pressure (mouth power through a tube).
I reassembled all hoses and left the Injector-side hose from the Thing-on-Side-of-Engine-under-Injection-Pump open, thinking that it was a fuel pump. When cranking, still no fuel from the Thing-on-Side-of-Engine-under-Injection-Pump. That's why I am not getting fuel to the Second Filter bleed port.
What is the Thing-on-Side-of-Engine-under-Injection-Pump? There are no electric wires to it. It seems to enter the side of the injection pump. There is a small, spring loaded lever on the side of it, but it doesn't seem to have any effect. Is it a fuel pump? A mechanical fuel cut off valve? Does a L35 or L3400 have a fuel pump somewhere else that I've missed?
I've used a few too many words to explain this, but wanted to be as clear as I can. Thanks for any ideas or experiences with this type of fuel system.
r-
Tom C.