D950 starting -fuel - injection issue

[chriscorr]

Hey all,

I have a d950 engine had been running fine went to start up there it ran for a few seconds then cut off.
Tank full
Full fuel coming all the way to the injector pump. But there's no fuel going from the pump to any of the injectors

What's possibly gone on here?
Any help much appreciated
Chris.

 

[Russell King]

Your tractor turns off (engine shuts down) with the key I assume. If so there is an electric solenoid that pulls the “rack” of the injection pump closed when you turn the key off OR the solenoid holds the rack open to keep it running when the key is in the run position.

Either way that solenoid is probably not working properly. Check how it should work and if it is working at all. Check fuses first.

Good luck

 

[TheOldHokie]

Hey all,

I have a d950 engine had been running fine went to start up there it ran for a few seconds then cut off.
Tank full
Full fuel coming all the way to the injector pump. But there's no fuel going from the pump to any of the injectors

What's possibly gone on here?
Any help much appreciated
Chris.

The D950 in a B7200 has a pull cable fuel shutoff. Check the fuel shutoff.

Dam

 

[chriscorr]

Your tractor turns off (engine shuts down) with the key I assume. If so there is an electric solenoid that pulls the “rack” of the injection pump closed when you turn the key off OR the solenoid holds the rack open to keep it running when the key is in the run position.

Either way that solenoid is probably not working properly. Check how it should work and if it is working at all. Check fuses first.

Good luck

Hey its a bobcat

Your tractor turns off (engine shuts down) with the key I assume. If so there is an electric solenoid that pulls the “rack” of the injection pump closed when you turn the key off OR the solenoid holds the rack open to keep it running when the key is in the run position.

Either way that solenoid is probably not working properly. Check how it should work and if it is working at all. Check fuses first.

Good luck

Hey, it's a bobcat, it's got a manual pull stopper. But it probably is something to do with that stopper, it pulls forward and springs back and its feels completely fine and normal, would you have any tips on how to check further into the fuel stopper or what to look for?

 

[chriscorr]

The D950 in a B7200 has a pull cable fuel shutoff. Check the fuel shutoff.

Dam

Probably is something to do with that fuel shut off, but it feels fine, any tips for what to look for when ypu open up the fuel stopper cover?

 

[TheOldHokie]

Probably is something to do with that fuel shut off, but it feels fine, any tips for what to look for when ypu open up the fuel stopper cover?

If its the same as the B7200 its a lever on the side of the engine. Easy to check the position of that lever.

Dan

 

[chriscorr]

If its the same as the B7200 its a lever on the side of the engine. Easy to check the position of that lever.

Dan

Yeah I looked it and it looks fine it slides back and forward with no issue.

When I started it the first time it ran but waa on full throttle so I pulled the throttle back full way cause I didn't want the engine running hard cold but the action of pulling the throttle back all the way killed the engine...could I have damaged something in the governor that's stopping the fuel?

Like obviously now when I'm trying I have the throttle fully on, but as I said nothings going to the injectors

 

[North Idaho Wolfman]

It's very very unlikely that you have damaged the governor, they are extremely tough.
But maybe broken a spring on the governor linkage, that could happen.

First snap a couple pics of the injection pump and the stop cover on the side and the throttle cover on the top.
This will help us be able to direct what you need to do next.

 

[chriscorr]

It's very very unlikely that you have damaged the governor, they are extremely tough.
But maybe broken a spring on the governor linkage, that could happen.

First snap a couple pics of the injection pump and the stop cover on the side and the throttle cover on the top.
This will help us be able to direct what you need to do next.

OK, I'm away now until tomorrow, when I'm back at it tomorrow il get some pics and il upload for yous to get a look.
Thanks

 

[chriscorr]

hey, sorry only getting bk now,
So just a reminder my issue is, fuel coming to the pump but not through the pump to the injectors...its almost like the fuel shut off is engaged.
I've uploaded photos of the fuel shut off above and opened it up.
It moves as it should, if I slide it forward with my finger when I let go it springs back, so I can't see any issue there with that,
Secondly the throttle lever ontop I can pull it forward and when I let go it springs back so feels normal.

What could be going on here? What else could it be??

 

[chriscorr]

It's very very unlikely that you have damaged the governor, they are extremely tough.
But maybe broken a spring on the governor linkage, that could happen.

First snap a couple pics of the injection pump and the stop cover on the side and the throttle cover on the top.
This will help us be able to direct what you need to do next.

I've updated the thread with some photos

 

[North Idaho Wolfman]

View attachment 152506 View attachment 152507 View attachment 152508 hey, sorry only getting bk now,
So just a reminder my issue is, fuel coming to the pump but not through the pump to the injectors...its almost like the fuel shut off is engaged.
I've uploaded photos of the fuel shut off above and opened it up.
It moves as it should, if I slide it forward with my finger when I let go it springs back, so I can't see any issue there with that,
Secondly the throttle lever ontop I can pull it forward and when I let go it springs back so feels normal.

What could be going on here? What else could it be??

Common failure point on these engine is the lift pump (yellow) which when bad, will not push fuel up to the injection pump.

Bobcat and other units like this also tend to have problems with fuel pickup in the tank.
Pull the fuel line off the side of the injection pump (green) and crank it and see if you get pulses of fuel.
If you don't get pulses of fuel go down to the lift pump and see if you have fuel going to the lift pump.
if you don't then you will need to chase the fuel line back to the tank and maybe into the tank.

The valve above (blue) is the jet start valve, it bleeds air out of the line going to the injection pump, below is a new one, and only lightly tighten the wheel, common issue is they get over tightened and break the wheel off.

For Kubota Jet Start Cock Assembly 14311-60504 14311-60500 14311-60580 Tractor | eBay

B9200HSD-TOW (Hydrostatic Transmission, 4wd / Tow tractor) - T02000 INJECTION PUMP. B9200HSD-TOW (Hydrostatic Transmission, 4wd / Tow tractor) - T03000 FUEL PIPE 2. L2550DT-GST (Glide shift transmission, 4wd).

www.ebay.com

If you do need to replace the lift pump, below and you get it and the clocking (direction of in and out) on the pump is not the same, that is easily changed.

Fuel Lift Pump 15263-52030 Fits Kubota Engine D1102 D1302 D1402 V1502

One New Aftermarket Replacement Fuel Pump Fits Kubota Tractor Models: Z482, D662, D722Fits Bobcat Skid Steer Loader Models: 320, 443, 453, 743.May fit other Fits Bobcat models as well.COMES WITH GASKETReplaces Part Numbers: FSG60-0079, 15263-52030, 15381-52030, 15401-52032, 15401-52030...

www.reliableaftermarketparts.com

 

[chriscorr]

Hey, th

Common failure point on these engine is the lift pump (yellow) which when bad, will not push fuel up to the injection pump.
View attachment 152524

Bobcat and other units like this also tend to have problems with fuel pickup in the tank.
Pull the fuel line off the side of the injection pump (green) and crank it and see if you get pulses of fuel.
If you don't get pulses of fuel go down to the lift pump and see if you have fuel going to the lift pump.
if you don't then you will need to chase the fuel line back to the tank and maybe into the tank.

View attachment 152522

The valve above (blue) is the jet start valve, it bleeds air out of the line going to the injection pump, below is a new one, and only lightly tighten the wheel, common issue is they get over tightened and break the wheel off.

For Kubota Jet Start Cock Assembly 14311-60504 14311-60500 14311-60580 Tractor | eBay

B9200HSD-TOW (Hydrostatic Transmission, 4wd / Tow tractor) - T02000 INJECTION PUMP. B9200HSD-TOW (Hydrostatic Transmission, 4wd / Tow tractor) - T03000 FUEL PIPE 2. L2550DT-GST (Glide shift transmission, 4wd).

www.ebay.com

If you do need to replace the lift pump, below and you get it and the clocking (direction of in and out) on the pump is not the same, that is easily changed.

Fuel Lift Pump 15263-52030 Fits Kubota Engine D1102 D1302 D1402 V1502

One New Aftermarket Replacement Fuel Pump Fits Kubota Tractor Models: Z482, D662, D722Fits Bobcat Skid Steer Loader Models: 320, 443, 453, 743.May fit other Fits Bobcat models as well.COMES WITH GASKETReplaces Part Numbers: FSG60-0079, 15263-52030, 15381-52030, 15401-52032, 15401-52030...

www.reliableaftermarketparts.com

Hey thanks for the reply,
It's not the lift pump plenty of diesel coming to the injector pump, yes the wheel broke on the jet valve but I can still open and close it so the fuel has been bled to here,
For some reason it's not pumping through the pump? The stopper is sliding back normally, can the pump just fail like that? Doesn't seem logical but I'm all out of ideas

 

[North Idaho Wolfman]

No the injection pumps don't just fail.
You say that you have fuel to the injection pump, how do you know that?
It doesn't look like any fuel line or injector line has been removed from the input or output of the pump.
Take the injector lines off the top of the pump, and crank it, you should be getting about 2" fountains out of the delivery pumps.

 

[chriscorr]

No the injection pumps don't just fail.
You say that you have fuel to the injection pump, how do you know that?
It doesn't look like any fuel line or injector line has been removed from the input or output of the pump.
Take the injector lines off the top of the pump, and crank it, you should be getting about 2" fountains out of the delivery pumps.

 

[chriscorr]

The red circle is the indeed pipe to thr injector..the other pipe is the return....when I first got this engine last year, I waa able test the engine by running fuel direct to the injector pump that I've circled and if cranked it will start.
Not in the picture above but I've got fuel plugged direct to the pump so there is 100% fuel at the pump.
With the injectors of there's nothing coming out, just a tiny dribble.
I cant understand why it's not coming through properly

 

[Russell King]

Okay you seem to be saying different things in different posts or making confusing statements = either the tank is full or you are supplying fuel from some other source. I can’t tell which is the current situation. Perhaps post a picture of what the fuel is in and how it is being supplied to the injection pump.

If you are sure that fuel is gett to the injection pump the remove the fuel lines as requested by @North Idaho Wolfman (post #14) and see if you are really pumping fuel out of the injection pump. If so, then you may need to clean out the lines between the pump and injectors. Then bleed the air out of those lines either way if there is fuel coming out of the pump.

 

[North Idaho Wolfman]

Yea If you've gotten air in the pump, you've gotten air in the injector lines and they must be bleed before you will get fuel out of the injectors.
They will not pop with air in the lines, and they do not self bleed on this model.

 

[chriscorr]

Guys sorry if I hvnt been clear...
Initially everything set up normal, fuel line from tank to filter to lift pump to injector pump..and confirmed 100% fuel coming through the lift pump but not injector.

2. (Even though not necessary) I went ahead anyways and connected directly to the injector pump from the fuel tank with a fuel priming bulb on the line.

3.when I take of the 3 injector pipes at the top of the injector and prime with the bulb I get diesel flying out of the middle injector but nothing coming out of the two outside injectors...
So I use pipe grips to rotate the crankshaft around to change the timing but no matter what diesel only comes through the middle one.

I've took a video see picture I can send video if yous wanna see what's app me

 

[chriscorr]

Okay you seem to be saying different things in different posts or making confusing statements = either the tank is full or you are supplying fuel from some other source. I can’t tell which is the current situation. Perhaps post a picture of what the fuel is in and how it is being supplied to the injection pump.

If you are sure that fuel is gett to the injection pump the remove the fuel lines as requested by @North Idaho Wolfman (post #14) and see if you are really pumping fuel out of the injection pump. If so, then you may need to clean out the lines between the pump and injectors. Then bleed the air out of those lines either way if there is fuel coming out of the pump.

See my latest post