Hi
I have a 2006 TLB 48 ( L48 ) with approx 320 hours as of 2/19/2011.
Approx one year ago as I was driving the tractor up the driveway the motor suddenly rev'ed up to what must have been 4000-5000 RPM, faster than any diesel I have ever heard. I threw black smoke like nothing I have ever seen and the switch would not shut it down. I had to pull the fuel line off of it to get it to shut down. I called my dealer and spoke to them about it, asking as to what I should do. They told me to start it back up and see how it did. I changed the oil, I was afraid I may have had fuel in the oil, and checked all fluids, everything was ok. It started back up and has been running for the past year w/o issue. The dealer was unable to find the cause and basically told me they had never heard of such a thing and they also spoke with Kubota engineers and they were unaware of any issues. They sent me home w/o any diagnosis and a hefty bill.
The exact some issue happened again this weekend, only after I restarted it approx 20 minutes later it did the same thing.
The only similar issue is that the backhoe has been on both times. I was driving it one time and using the backhoe the other time.
I contacted my dealer again and they said they are not really interested in looking at it as they have no ideas on what would cause this.
I am thinking a bad injector pump? Bad governor? But why wouldn't the switch shut the motor off? I'm pretty sure it's not running off of oil, like I have heard some people say as the oil level is fine and when I pull the fuel line it will shut down.
Thank you for your help
Mike
I have a 2006 TLB 48 ( L48 ) with approx 320 hours as of 2/19/2011.
Approx one year ago as I was driving the tractor up the driveway the motor suddenly rev'ed up to what must have been 4000-5000 RPM, faster than any diesel I have ever heard. I threw black smoke like nothing I have ever seen and the switch would not shut it down. I had to pull the fuel line off of it to get it to shut down. I called my dealer and spoke to them about it, asking as to what I should do. They told me to start it back up and see how it did. I changed the oil, I was afraid I may have had fuel in the oil, and checked all fluids, everything was ok. It started back up and has been running for the past year w/o issue. The dealer was unable to find the cause and basically told me they had never heard of such a thing and they also spoke with Kubota engineers and they were unaware of any issues. They sent me home w/o any diagnosis and a hefty bill.
The exact some issue happened again this weekend, only after I restarted it approx 20 minutes later it did the same thing.
The only similar issue is that the backhoe has been on both times. I was driving it one time and using the backhoe the other time.
I contacted my dealer again and they said they are not really interested in looking at it as they have no ideas on what would cause this.
I am thinking a bad injector pump? Bad governor? But why wouldn't the switch shut the motor off? I'm pretty sure it's not running off of oil, like I have heard some people say as the oil level is fine and when I pull the fuel line it will shut down.
Thank you for your help
Mike
