Injection Issue

[Gurney1010]

I traded for a 2021 Branson 3620R, knowing it had an issue in the fuel system.., and assuming it had an injector pump issue. Regen has been deleted, it has a Doowon mechanical pump with mechanical injectors. It will start and run for about a minute or so but dies. I have confirmed it is getting good fuel flow to the injection pump. Any thoughts from anyone would be appreciated. Tractor only has 400+ hours.

 

[dodge man]

Does it have a lift pump and is it working correctly?

 

[ptsg]

I agree with Dodge man. If you turn the key on, you should hear the lift pump clicking. This pump is located just below the fuel filter.

 

[Gurney1010]

Lift pump works fine , getting good fuel flow through the filter to the injection pump.

 

[ironman_gq]

fuel cutoff solenoid dropping out? Small air leak at the filter housing causing loss of prime?

 

[Gurney1010]

Have no problems with the lift pump, filter , or cut off. As I stated in the post fuel delivery to the injection pump is great. So the problem is apparently with the injection pump. Tractor starts good but dies after a couple of minutes.

 

[nyone]

Does it restart instantly? Or crank for a bit like it lost prime? Did you check or disconnect and fuel shutoff solenoid.

 

[Gurney1010]

Does it restart instantly? Or crank for a bit like it lost prime? Did you check or disconnect and fuel shutoff solenoid.

Will start back up, but doesn’t run as long. It doesn’t act like it loosing prime.

 

[Patches]

Will start back up, but doesn’t run as long. It doesn’t act like it loosing prime.

Did you try removing the fuel tank cap? Possibly the vent isn't functioning properly

 

[Gurney1010]

Did you try removing the fuel tank cap? Possibly the vent isn't functioning properly

Did you try removing the fuel tank cap? Possibly the vent isn't functioning properly

Yes I did, also checked to make sure getting good flow out of the tank. I have pretty much decided I have a problem with the injection pump itself.

 

[Gurney1010]

Did you try removing the fuel tank cap? Possibly the vent isn't functioning properly

Did you try removing the fuel tank cap? Possibly the vent isn't functioning properly

Yes, also checked to make sure getting good flow out of the fuel tank. I have pretty much decided I have a problem in the injection pump itself.

 

[nyone]

Have you tried running any type of injection cleaner through it or even looking for a screen on the low pressure fuel side?
I assume you alreaty replaced the fuel filter.

 

[Gator6x4]

Time to send this member a private message.

Hello Everyone

I just thought I'd stop by & introduce myself.. I'm "the pump guy sc" I call South Carolina my home & I rebuild diesel injection pumps for a living.. I have for the last 30+ years.. Feel free to ask me anything pump/fuel related.. or you can contact me at my screen name & put a o l dot com after...

www.orangetractortalks.com

 

[JTKub]

Does it seem to only do this once things heat up? Any type of smoke out of the exhaust before it dies?

If it does start and run perfectly fine, with full engine RPM range and power for a period of time, you'd think the HP fuel pump is OK. In my mind they either work or they don't. Like mentioned, is the fuel cutoff solenoid on the HPFP dropping out? Is the low press pump or flow from it intermittent?

 

[rScotty]

Sounds like the fuel filter or housing to me. Can you check that by suspending a container of fuel above the hood? Or bypassing the fuel filter?

 

[GrandpaSmurf825]

It's pretty simple really. If you have fuel, compression, and air it will run. You aren't losing air or compression obviously so you have to be losing fuel. The fuel shutoff solenoid bolts to the pump correct? How are you determining that it can't be dropping out? Power to it doesn't mean it can be a weak coil. Looks like an electric lift pump is used. How do you know it's maintaining sufficient pressure after start up? It is one thing to build up pressure before starting but it might be failing after start up. saw it on a John Deere engine more than once. Bosch fuel system. Variable flow lift pump. It would be running full throttle and die. Pump was failing and when the pump stalled the engine died. On this system fuel pressure was maintained by the ECM lowering or raising the voltage to the pump to maintain the desired pressure. The pump would start again if I tapped on it when the engine would try to die. I

 

[Gurney1010]

Have you tried running any type of injection cleaner through it or even looking for a screen on the low pressure fuel side?
I assume you alreaty replaced the fuel filter.

Yes, thanks

 

[Gurney1010]

It's pretty simple really. If you have fuel, compression, and air it will run. You aren't losing air or compression obviously so you have to be losing fuel. The fuel shutoff solenoid bolts to the pump correct? How are you determining that it can't be dropping out? Power to it doesn't mean it can be a weak coil. Looks like an electric lift pump is used. How do you know it's maintaining sufficient pressure after start up? It is one thing to build up pressure before starting but it might be failing after start up. saw it on a John Deere engine more than once. Bosch fuel system. Variable flow lift pump. It would be running full throttle and die. Pump was failing and when the pump stalled the engine died. On this system fuel pressure was maintained by the ECM lowering or raising the voltage to the pump to maintain the desired pressure. The pump would start again if I tapped on it when the engine would try to die. I

Thanks, the existing lift pump was working, but didn’t seem to have the pressure one would expect so I replaced it with a new one. Fuel supply is great. The only thing I haven’t done is replace the fuel shut off solenoid. That’s the next thing I need to do. It looks like I will have to take the filter mount loose to be able to get a wrench on it.

 

[ptsg]

Is there any safety switches left in this tractor? Maybe one under the seat? Almost looks like it's a safety switch acting up.

I'm also thing about how the delete was done but I don't think that unplugging the DPF controller would cause shut down issues. You would lose some of the gauges I believe.

 

[Gurney1010]

Sounds like the fuel filter or housing to me. Can you check that by suspending a container of fuel above the hood? Or bypassing the fuel filter?

No problem with fuel flow through the filter.