Kubota 2650

[gravelman]

Hi folks...my Kubota 2650 keep stalling and i believe it is the seat safety switch..i have placed a HEAVY piece of iron under a cushion but still trouble. this is a major pain in the neck. I have removed the seat cushion and tried rearranging things and finding ways to put pressure on it. Had it to the dealer and they did nothing. Too much trouble to disconnect. Maybe cement blocks. Anyone have a problem like this???

 

[ovrszd]

Not sure how your switch is wired? Most make a connection when weight is applied. Open the circuit when weight is removed.

If yours works that way, it's a simple two wire circuit. Connect the two wires and the switch is bypassed.

I have zero tolerance for a seat switch. Is there some reason you are wanting to retain it?

 

[gravelman]

i would gladly do without....mine is not so easy...i traced all the wires and they have it so other electrical items are interferred with if i attempt to do what you say... also, the connections are quite difficult to take apart etc...im afraid if i start messing with it...bigger problems.

 

[ovrszd]

I would agree with your concerns if the seat switch connector has more than two terminals. Or if the circuit is closed when no weight is applied and opens when weight is applied.

If it's like I think it is, jumping the two wires will be interpreted by the computer as someone sitting in the seat. No different than mounting the machine and then turning on the key.

Maybe a study of parts including wiring harnesses on Kubota's parts website. They have great illustrated parts diagrams.

 

[oldballs]

Maybe it's got something to do with the position of the PTO lever. If one raises from the seat when the PTO lever is engaged the engine stops.

 

[fried1765]

Hi folks...my Kubota 2650 keep stalling and i believe it is the seat safety switch..i have placed a HEAVY piece of iron under a cushion but still trouble. this is a major pain in the neck. I have removed the seat cushion and tried rearranging things and finding ways to put pressure on it. Had it to the dealer and they did nothing. Too much trouble to disconnect. Maybe cement blocks. Anyone have a problem like this???

Separate the seat switch plug, and make a jumper for it.
With a jumper, seat will think it is always loaded.

 

[ovrszd]

Looking at the wiring diagram and seat switch parts it looks like it's a simple two wire connection. Should unplug within a few inches of the switch. Unplug and count terminals. If two, jump them across and try it. That should override switch and make the computer think someone is sitting in the seat all the time.

If you can go back and edit this thread, add "seat switch?" to the thread title so readers will know the subject rather than just the tractor model.

 

[ovrszd]

Maybe it's got something to do with the position of the PTO lever. If one raises from the seat when the PTO lever is engaged the engine stops.

Good point Mike.

 

[ovrszd]

Separate the seat switch plug, and make a jumper for it.
With a jumper, seat will think it is always loaded.

Yep. That's the only type I've saw. I'm not a seat switch fan at all.....

 

[ovrszd]

i would gladly do without....mine is not so easy...i traced all the wires and they have it so other electrical items are interferred with if i attempt to do what you say... also, the connections are quite difficult to take apart etc...im afraid if i start messing with it...bigger problems.

In regards to separating the connections. Some have a locking clip. The clip will be red. A sharp pick or maybe small needle nose pliers will pull the red clip out. Most just need pulled out a little which releases the latch mechanism. Some have to be completely removed.

Once the red locking clip is pulled you can then push the latch and release the connector. No great amount of force is required.

 

[gravelman]

ok everyone...good stuff.. i just pulled up the seat pad...two wires going to a 8" square flat piece of plastic with 4 little dots in the corners.. i would say when pressure is on that pad..all good...as soon as pressure released, engine quits. As you said earlier...if i connect those two together with a jumper...it may do the trick.. i may wait till after the next snow storm...

 

[ovrszd]

Should be a wiring lead coming out of that pad switch and going to a connector somewhere close by. I'd do my altering at that connector. Such as unplugging it and adding a jumper.

 

[fried1765]

ok everyone...good stuff.. i just pulled up the seat pad...two wires going to a 8" square flat piece of plastic with 4 little dots in the corners.. i would say when pressure is on that pad..all good...as soon as pressure released, engine quits. As you said earlier...if i connect those two together with a jumper...it may do the trick.. i may wait till after the next snow storm...

It .... WILL ..... work!
My Kubota L48 has had that same seat switch bypass (jumper), likely since the day after it was delivered to the original owner.

 

[gravelman]

ok i will give it a try but not till after this weeks snowstorm... thanks all for this

 

[East30]

I have a B2650, no issue with mine as you are having, but I do have questions. When exactly does it stall, only under duress with a load of some type or in gear? The reason I ask is that I can start my tractor with no one in the seat, does that mean the seat switch is only active under certain conditions?

 

[gravelman]

i can also start mine unseated but there are times when it stalls out if there is not enough weight on the seat. I know that sounds crazy but the position of the seat safety must be ok to allow it to start unseated. There have been times i turned around on the seat to look backwards only to have it stall... It has never stalled under a load and i have hsd. It does sound confusing and im not a mechanic or engineer but it will stall, even if the pto is NOT operating. My wife is a lightweight... and when she drives, it stalls on her continually, thus i put a heavy piece of steel under the pad

 

[dfkrug]

The reason I ask is that I can start my tractor with no one in the seat, does that mean the seat switch is only active under certain conditions?

You may have a system that allows starting from off the seat when the gearbox part of the transmission is in neutral. Or your seat switch is stuck ON.

There are numerous scenarios where a simple seat switch that kills the engine is not a good idea by itself. One is when you are operating the PTO while off the tractor, as with a PTO-driven mixer, pump, generator, etc. Another is when you are getting off and on the tractor for sensitive lifting/pulling work.

On a new Bobcat CT230 I once bought, pushing on the brake to engage/disengage the parking brake would lift my rear end just enough to kill the engine. That "feature" had to go right away. It was the seat switch, and I jumpered it.

 

[gravelman]

very interesting. i cannot fully explain it as it will shut down without running pto or anything else for that matter. And yet i power my wood splitter etc and it runs fine. Someone out there will explain it all...

 

[ovrszd]

Very simple explanation. Disable the seat switch.