Three weeks ago, my tractor started, but died right away, (3 seconds). Since then it cranks, but no start. I have changed the fuel filter and low pressure fuel lines, bled the system, and still cranks, but no start. I have about 5 1/2 psi and good volume of fuel coming from the lift pump. When I crack the bleeder valve on the high pressue pump, I get good flow to the fuel return lines. But when I pull the steel lines at the injectors, I get very little fuel and still has bubbles, even after lots of cranking. I put a piece of paper under the #1 line so I could watch for fuel, and there is a rythmatic pulse of bubbles and a little fuel when cranking, but seems to be almost no pressure and only amounts to maybe a drip every 1 - 2 seconds of cranking. Can anyone please help?
B8200 cranks, but won't start
- Thread starter Sam B
- Start date
Anybody out there have any idea's, I really need to get this tractor going so I can finish my driveway.
Thanks in advance
Thanks in advance
kubotasam
Well-known member
Equipment
B2410, B7100dt, B7500,Woods BH750,Landpride 2660RFM, Tiller, B2781 Snowblower
It sounds like you still have air in the fuel injection pump.
The procedure for a B7100 from my IT manual says. Open the air bleed screw (on injection pump) and place throttle in fully closed position. Turn engine over for approximately 10 seconds, then close screw when bubbles disappear.Disconnect fuel pressure lines from the injectors. turn engine over until air free fuel flows.
I assume a B8200 would be similar to a B7100. Hope this helps.
The procedure for a B7100 from my IT manual says. Open the air bleed screw (on injection pump) and place throttle in fully closed position. Turn engine over for approximately 10 seconds, then close screw when bubbles disappear.Disconnect fuel pressure lines from the injectors. turn engine over until air free fuel flows.
I assume a B8200 would be similar to a B7100. Hope this helps.
Was is low on fuel when it died or was the fuel filter plugged up? It ran normally with good power before it died, no other symptoms?
It sounds to me like there's still an air bubble in the injection pump but it could be something else. I'd look at the bleeder on the pump and possibly remove that and see if you can coax the air bubble out.
EDIT: Heh jinks
It sounds to me like there's still an air bubble in the injection pump but it could be something else. I'd look at the bleeder on the pump and possibly remove that and see if you can coax the air bubble out.
EDIT: Heh jinks
Thanks for the helpful info guys.
The fuel tank is about 3/4 full. The last time I used it, the tractor started normal and ran normal. I pulled it in the garage and shut if off and it probably sat for a month before I went to use it. I changed the fuel filter because of the no start, but found very little debri in the bottom of the sediment bowl.
I have bled the fuel at the valve on the high pressure pump that comes off the banjo fitting. The came out of it very well during cranking. I have cranked the engine for 30 - 45 seconds probably 10 plus times,( waiting about 10 minutes between each try so as not to overheat the starter), and I still only get a little fuel with bubbles coming from the steel line to #1 injector.
The fuel tank is about 3/4 full. The last time I used it, the tractor started normal and ran normal. I pulled it in the garage and shut if off and it probably sat for a month before I went to use it. I changed the fuel filter because of the no start, but found very little debri in the bottom of the sediment bowl.
I have bled the fuel at the valve on the high pressure pump that comes off the banjo fitting. The came out of it very well during cranking. I have cranked the engine for 30 - 45 seconds probably 10 plus times,( waiting about 10 minutes between each try so as not to overheat the starter), and I still only get a little fuel with bubbles coming from the steel line to #1 injector.
I'm stumped (heh). Fuel might have gelled while it sat but it should've reliquified by now in these temps. Most of the other issues I can think of aside from fuel leaking out of the pump somehow should've caused symptoms prior to it failing to start.
Stop and governor cables are ok and their respective levers still move? All I can offer is check the stupid things and keep bleeding or start doing some exploratory surgery.
Stop and governor cables are ok and their respective levers still move? All I can offer is check the stupid things and keep bleeding or start doing some exploratory surgery.
Stumpy,
I keep wondering about the fuel shut off lever on the side of the injection pump. Looks there are just 4 bolts holding that assembly in the side of the pump housing. what should I find if I remove that, and has there been any trouble with these that you are aware of?
Sam
Yes it just four bolts but if you remove that you'll have to replace the gasket. All that is is a lever that pushes on a rod sticking out of the fuel rack that forces it to the cut off position. You can have a look but the way you describe those bubbles sound more indicative of air in the system than a problem with rack position but who knows? On mine the rack cut off position is full left and full displacement is all the way to the right.
Sam,
You might check your engine oil level to see if it has gone up. Could be that the seal on the injection pump camshaft has gone south and the fuel is ending up in the crankcase. This is just a hunch. I hope I'm wrong and this isn't the issue, but figured I'd toss it out there as a possibility.
The other thought is maybe the rack is stuck, in which case you are on the right track removing the fuel stop lever. It should all move freely, and if it doesn't then you've likely found your problem.
Fingers crossed that it's just an airlock in the injection pump!
Good luck,
Steve
You might check your engine oil level to see if it has gone up. Could be that the seal on the injection pump camshaft has gone south and the fuel is ending up in the crankcase. This is just a hunch. I hope I'm wrong and this isn't the issue, but figured I'd toss it out there as a possibility.
The other thought is maybe the rack is stuck, in which case you are on the right track removing the fuel stop lever. It should all move freely, and if it doesn't then you've likely found your problem.
Fingers crossed that it's just an airlock in the injection pump!
Good luck,
Steve
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Continued air bubbles cause me to think about air getting into the fuel suction. Check for wetted fuel lines, cracks, missing clamps, seal on fuel filter housing, trace and examine all fuel lines. You could be sucking air into the fuel system somewhere.
Otherwise continue cracking lines at injectors and working bubbles out.
Do you have a central thumb-screw bleeder to open?
Otherwise continue cracking lines at injectors and working bubbles out.
Do you have a central thumb-screw bleeder to open?
I'd pull the injectors hook the lines up to them and see if they are firing. If not then it's a fuel delivery issue or pump problem if they are and you have good compression and glow plugs then look at the cam and see what it's doing.