Glow light comes on for 3 seconds then goes out no matter the temperature, when below 40 degrees hard to start, changed glow plug relay, glow plug timer,glow plug timer, results still the same, what should I do next. Jerry
L2900 glowlight
- Thread starter Jerry White
- Start date
WSM's for your L2900 are not available on line which makes giving advice difficult.
What transmission does your tractor have?
Tractor data.com says a L3010 is the next model after your L2900.
Messicks' parts shows a controller fitting the L2900, L3010 and many other models. It does not describe it as the Glow controller but it looks the same as the one in the L3010 WSM.
For proper operation the glow Controller requires an accurate engine temperature signal upon which to make its decision regarding GP on time. Is you engine temp gauge working properly?
Please provide part numbers for the parts you changed.
Do you have a wiring diagram for your tractor?
If you do not have a 12 volt test light get one. I would like you to use it to monitor if we can get the GP's to work independent of the GP controller.
The following information on controlling GP's has been posted by me many times. I do not know if it will work on your L series but it is worth trying. To know if you are achieving manual GP control I suggest using the test light with the alligator clip connected to a GP and you grounding the test light pointed tip somewhere convenient in the cab. The comments re the block heater are not important to you just the way to turn on the GP's. Remember, if you heat the GP's too much you will destroy them so as a start just see if you can turn them on for longer then they are working presently.
In very cold weather, with the block heater plugged in, the glow plug sensor will lock out the glow plugs as it senses a warm engine.
However, starting, in these circumstances can be rough and worrisome as the engine is still inhaling very cold air.
The trick is to put the shuttle shift lever in forward and turn the key to the start position.
You will hear a relay click on. I count to 10, put the shuttle back into the neutral position and start the engine.
Makes an amazing difference.
On newer models, M7060 perhaps, Kubota realized the problem and provided software which would allow the dealer to set which sensor decided the GP on time. When owners of the M series tractors install their own block heater, they won’t get the software change and need to use the manual way to control the GP’s
I know there are GP work around on other Kubota models but I was only interested in M7040’s at the time.
I learned of this undocumented feature from a Kubota mechanic who was moving around many machines for snow clearing. It was very cold and the fact that he had no trouble getting them to fire caught my eye.
Dave
What transmission does your tractor have?
Tractor data.com says a L3010 is the next model after your L2900.
Messicks' parts shows a controller fitting the L2900, L3010 and many other models. It does not describe it as the Glow controller but it looks the same as the one in the L3010 WSM.
For proper operation the glow Controller requires an accurate engine temperature signal upon which to make its decision regarding GP on time. Is you engine temp gauge working properly?
Please provide part numbers for the parts you changed.
Do you have a wiring diagram for your tractor?
If you do not have a 12 volt test light get one. I would like you to use it to monitor if we can get the GP's to work independent of the GP controller.
The following information on controlling GP's has been posted by me many times. I do not know if it will work on your L series but it is worth trying. To know if you are achieving manual GP control I suggest using the test light with the alligator clip connected to a GP and you grounding the test light pointed tip somewhere convenient in the cab. The comments re the block heater are not important to you just the way to turn on the GP's. Remember, if you heat the GP's too much you will destroy them so as a start just see if you can turn them on for longer then they are working presently.
In very cold weather, with the block heater plugged in, the glow plug sensor will lock out the glow plugs as it senses a warm engine.
However, starting, in these circumstances can be rough and worrisome as the engine is still inhaling very cold air.
The trick is to put the shuttle shift lever in forward and turn the key to the start position.
You will hear a relay click on. I count to 10, put the shuttle back into the neutral position and start the engine.
Makes an amazing difference.
On newer models, M7060 perhaps, Kubota realized the problem and provided software which would allow the dealer to set which sensor decided the GP on time. When owners of the M series tractors install their own block heater, they won’t get the software change and need to use the manual way to control the GP’s
I know there are GP work around on other Kubota models but I was only interested in M7040’s at the time.
I learned of this undocumented feature from a Kubota mechanic who was moving around many machines for snow clearing. It was very cold and the fact that he had no trouble getting them to fire caught my eye.
Dave
North Idaho Wolfman
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This is a bit of guess based on my L35. There are 2 temperature sensors, one for the gauge and one to bias the glow timer. If the sensor to the timer is bad or the wire is shorted to ground, the timer will sense that the engine is warm and shorten the preheat time.
Here's the page from my WSM
Here's the page from my WSM