MX5800 stalling out occasionally

[coolbrze]

Like the title says, occasionally she'll start to stall out on me but if I let off the gas it idles back up. It almost seems like it could be the sensor under the seat? Would it help if I adjusted the seat suspension adjustment handle so it's more plush / less stiff? It's very hilly here & now that I think about it, I can't recall that it's done it anywhere else or even on flat ground here... Any ideas?

 

[AndyMA]

Like the title says, occasionally she'll start to stall out on me but if I let off the gas it idles back up. It almost seems like it could be the sensor under the seat? Would it help if I adjusted the seat suspension adjustment handle so it's more plush / less stiff? It's very hilly here & now that I think about it, I can't recall that it's done it anywhere else or even on flat ground here... Any ideas?

My MX5200 will start to stall if I adjust my weight on the seat, so you may be on the rigtht track

Andy

 

[100 td]

It almost seems like it could be the sensor under the seat?..It's very hilly here & now that I think about it, I can't recall that it's done it anywhere else or even on flat ground here... Any ideas?

You are already on the money! The seat switch is the likely cause, adjusting suspension wouldn't help I expect, but you may be able to adjust the switch.
From the manual
This tractor is equipped with Operator Presence Control (OPC) system. The engine stops automatically when the operator stands from the seat while engaging PTO, depressing speed control pedal (HST controlpedal) or engaging shuttle shift lever.
EDIT: AndyMA beat me to it!

 

[SDT]

Like the title says, occasionally she'll start to stall out on me but if I let off the gas it idles back up. It almost seems like it could be the sensor under the seat? Would it help if I adjusted the seat suspension adjustment handle so it's more plush / less stiff? It's very hilly here & now that I think about it, I can't recall that it's done it anywhere else or even on flat ground here... Any ideas?

"[L]et off the gas...?"

What do you mean? Are you speaking about the hydro pedal?

Are you overloading the engine by pushing too hard on the hydro pedal? If so, increase throttle and decrease hydro pedal.

If the engine is shutting down as if you turned the key switch off when on steep side slopes and/or you are leaning to the side in the seat, tighten the seat belt and/or short out the seat switch.

SDT

 

[Newby first timer]

My MX5200 will start to stall if I adjust my weight on the seat, so you may be on the rigtht track

Andy

Mine does this and even dies if I do not reposition my butt fast enough.
It drives me nuts when I am trying to look over the hood to see my Quick connect alignment with the implements.

Wish I could disable it all together.

 

[Fallon]

On my L3200 I used a zip tie to hold the lever on the seat presence sensor down. It was easily reversed when I sold it (and a couple times when it just came loose on its own). Not sure if your sensor is the same. It had 3 wires going to it, so would have been more complex than jumpering things closed to bypass the switch. Not rocket science hard, but definitely harder than just throwing a zip tie on.

 

[SDT]

On my L3200 I used a zip tie to hold the lever on the seat presence sensor down. It was easily reversed when I sold it (and a couple times when it just came loose on its own). Not sure if your sensor is the same. It had 3 wires going to it, so would have been more complex than jumpering things closed to bypass the switch. Not rocket science hard, but definitely harder than just throwing a zip tie on.

A zip tie worked on my B3350.

The L6060 was more of a task. I ended up removing the seat to disassemble it and fabricated a jumper wire assembly for the operator sensor switch which is inside the seat.

SDT

 

[Fallon]

A zip tie worked on my B3350.

The L6060 was more of a task. I ended up removing the seat to disassemble it and fabricated a jumper wire assembly for the operator sensor switch which is indide the seat.

SDT

I havent bothered with it on my new L4060. The cab stops me from standing to look at the tips of my pallet forks, which was a primary issue on the L3200. So it hasn't really bothered me enough to bother looking. I have the air ride seat, so the sensor is burried in there, as you can't flip the seat up. Not sure if that an air ride seat "feature" or a cabbed tractor thing. When I asked my dealer about how to run the PTO when I wasnt in the seat, the answer was either you can't, or put something heavy in the seat. Something heavy is an easy enough work around when I need to run the PTO generator, which I havent needed yet, I havent bothered with bypassing the wiring.

 

[AndyMA]

I havent bothered with it on my new L4060. The cab stops me from standing to look at the tips of my pallet forks, which was a primary issue on the L3200. So it hasn't really bothered me enough to bother looking. I have the air ride seat, so the sensor is burried in there, as you can't flip the seat up. Not sure if that an air ride seat "feature" or a cabbed tractor thing. When I asked my dealer about how to run the PTO when I wasnt in the seat, the answer was either you can't, or put something heavy in the seat. Something heavy is an easy enough work around when I need to run the PTO generator, which I havent needed yet, I havent bothered with bypassing the wiring.

If it's like my MX5200 you don't need to weight the seat to run the PTO when your not in the seat. Just flip the seat up away from the lever.

Use it all the tiem with my Valby Wood Chipper

Andy

 

[diesel85]

I'm a runner and weigh 115lbs and 120lbs wet.

I have this problem all the time on certain machines. My BX2200 doesn't have the issue.

 

[Fallon]

If it's like my MX5200 you don't need to weight the seat to run the PTO when your not in the seat. Just flip the seat up away from the lever.

Use it all the tiem with my Valby Wood Chipper

Andy

My L3200 was like that with the flip up seat. You can't flip up the air ride seat on the Grand Ls though.

 

[coolbrze]

"[L]et off the gas...?"

What do you mean? Are you speaking about the hydro pedal?

Are you overloading the engine by pushing too hard on the hydro pedal? If so, increase throttle and decrease hydro pedal.

If the engine is shutting down as if you turned the key switch off when on steep side slopes and/or you are leaning to the side in the seat, tighten the seat belt and/or short out the seat switch.

SDT

Yes when I let off the pedal. Not overloading at all, just normal operation.

Thanks everyone, it sounds like it may be the seat sensor. Not sure I want to disable it (safety reasons on a steep mountain property) so I guess I'll deal w/ it for now...

 

[BubbaJr]

I have the same problem with my B2650 cab model. I finally pulled the center cushion out of the seat and found out that the sensor switch is molded into the bottom of the cushion. I can be backing out of the barn, butt firmly planted on the seat, and it will die. I've had it die 4 times in a matter of 10 minutes, then run perfectly the rest of the time that day. Some days I don't have any issues, other days I feel like taking a hammer to it. :banghead: I feel like it, but I would never do it.

 

[SDT]

Yes when I let off the pedal. Not overloading at all, just normal operation.

Thanks everyone, it sounds like it may be the seat sensor. Not sure I want to disable it (safety reasons on a steep mountain property) so I guess I'll deal w/ it for now...

Tighten the seat belt.

SDT

 

[SDT]

I have the same problem with my B2650 cab model. I finally pulled the center cushion out of the seat and found out that the sensor switch is molded into the bottom of the cushion. I can be backing out of the barn, butt firmly planted on the seat, and it will die. I've had it die 4 times in a matter of 10 minutes, then run perfectly the rest of the time that day. Some days I don't have any issues, other days I feel like taking a hammer to it. :banghead: I feel like it, but I would never do it.

Similar to my L6060.

I disassembled the seat and shorted out the switch.

All is now well.

SDT

 

[JWR]

Coolbrze did not clarify that I can find whether the engine is "stalling out" as his thread title implies OR is doing an immediate shutdown. Those are two very different problems.

Stalling to me would mean acting as if overloaded or lacking fuel and unable to keep going while an electrical interlock like the seat would produce an almost immediate shutdown. Easily tested: Get up off it slightly and see if the sound/behavior is the same as the problem of the topic.

 

[corl]

I need to stand up and view the bucket when I attach it. Also when attaching a 3 point device it is nice to be able to move the tractor slightly. I used a zip tie to control the lever switch on my MX5100. Works great and makes it usable.

 

[Luke'sScreenName]

If you want to test it. Under the left side of the seat and the floor board is an electrical quick connect for the seat sensor. Disconnect it to disable the seat safety. No wire jumpers needed for this model.