BX24 Stalling

[WileECoyote]

Hello All, New member with first post here.

My '06 BX24 developed a bad habit last year that I cannot nail down. Intermittently, the tractor wants to stall when the throttle is depressed. If I'm quick enough, lifting off the throttle will keep it from stalling but as soon as I apply the slightest pressure, it will stall again. Once the tractor starts doing this, it must be shut off and left for a period of time before it will run again without choking. This condition is most prevalent on cold and wet days (almost every time I use the machine in these conditions) though it has happened once or twice during the summer.

Things I've done so far looking for this gremlin.

At first, I thought it was one of the 4 switches under the seat and each was changed out with no success. these were an issue years before and I have spares. no change.

A change of fuel filters also made no difference. They get changed yearly otherwise.

I disconnected the fuel pump discharge hose and had it pump about 3 gallons of fuel from the tank without a hiccup.

The 3 Glow plugs and the buss bar were changed. The buss bar had cracked long ago but the tractor started normally for years hence it never got higher on the maintenance list until now. it does start immediately now where as it took a rotation or two before.

The stop solenoid "sounds" normal ie it resets after about 5 seconds when I cycle the key. I do not know how to test this any further. This part is original as is the "timer" under the dash. I think it is the timer that releases the solenoid. correct me if I'm wrong please.

I've gone through all the wiring to look for breaks, shorts, chafing, pinches and the like.

The battery will be getting replaced very soon as it isn't holding the charge during the last couple of weeks.

I'm at a complete loss now, having looked at everything fuel delivery related and electrical. and I don't want to just throw parts at it. Being an intermittent issue, the problem doesn't seem to last long enough to get a multimeter on to track down. I'm not looking forward to snow plowing my 400' driveway with this issue again this Winter. Any help and direction will be greatly appreciated.

Pete

 

[PaulL]

Seat switches and the like should be on or off - it shouldn't "stall" but rather cut out. I guess the question is whether this is really load related or movement related.

If it's load related, it'd bog down like it was starving from fuel, but it would keep running. So you'd be able to shift into low ratio, and creep, and it'd run still, it's down on power but it's not cutting out. That would suggest a fuel problem of some sort - a blockage perhaps, or bad fuel pump.

If it's movement related/switch related, then any pushing on the HST at all will cause it to cut out. That indicates that you've got a problem with a safety switch/safety system somewhere, and so when you try to start moving by pressing the pedal it's deciding there's no operator in the seat and cutting the fuel.

From your description it sounds like the latter.

I always figure the best way to work out if that's true is to just bypass all the safety switches entirely (for diagnostic purposes only) - and the easiest way to do that is to put power on the fuel solenoid/take power off the fuel solenoid as the case may be (you need to know how your fuel solenoid works to do that). If you have the tractor in a no run situation, you bypass all the safety switches and now it runs, then you un-bypass the safety switches and it stops running again, then you have isolated the problem. Then it's a case of working out which switch or component of the safety system.

As always, you sort of have to diagnose in the moment - otherwise you're just replacing everything in the hopes it stops happening. But you can get all the knowledge you need to diagnose it sorted (i.e. work out how to bypass the system, test it by nudging the HST when you're not in the seat, get all the wiring/stuff you need into the tractor toolbox), then just wait for it to happen.

One risk to understand in this situation is that you'll have no way to shut the tractor off - you've basically wired the solenoid open....so without disconnecting that wire the tractor won't stop. So it's for diagnosis only, it's not a solution, you shouldn't try to run the tractor this way.

If you're not keen on that, then I'll stretch my remote fault finding and say that IF it only happens when the HST pedal is pressed, then it has to be operator presence. That means you can rule out the PTO lever and some of those other safety switches - they prevent it starting, they don't impact when you press the HST. The only safety switch I think that's relevant to pressing the HST pedal is the seat switch - it'll cut fuel if it thinks there's nobody in the seat, but otherwise, it'll go just fine. (Another diagnosis here would be to try turning on the PTO in that same situation - that should also cut fuel if it thinks there's nobody in the seat). So if you're of the mind to try trouble shooting when it's not happening, then I'd say the seat safety switch and any other bits of wiring or electronics that your WSM says are associated with operator presence.

 

[Deadhead]

Hello All, New member with first post here.

My '06 BX24 developed a bad habit last year that I cannot nail down. Intermittently, the tractor wants to stall when the throttle is depressed. If I'm quick enough, lifting off the throttle will keep it from stalling but as soon as I apply the slightest pressure, it will stall again. Once the tractor starts doing this, it must be shut off and left for a period of time before it will run again without choking. This condition is most prevalent on cold and wet days (almost every time I use the machine in these conditions) though it has happened once or twice during the summer.

Things I've done so far looking for this gremlin.

At first, I thought it was one of the 4 switches under the seat and each was changed out with no success. these were an issue years before and I have spares. no change.

A change of fuel filters also made no difference. They get changed yearly otherwise.

I disconnected the fuel pump discharge hose and had it pump about 3 gallons of fuel from the tank without a hiccup.

The 3 Glow plugs and the buss bar were changed. The buss bar had cracked long ago but the tractor started normally for years hence it never got higher on the maintenance list until now. it does start immediately now where as it took a rotation or two before.

The stop solenoid "sounds" normal ie it resets after about 5 seconds when I cycle the key. I do not know how to test this any further. This part is original as is the "timer" under the dash. I think it is the timer that releases the solenoid. correct me if I'm wrong please.

I've gone through all the wiring to look for breaks, shorts, chafing, pinches and the like.

The battery will be getting replaced very soon as it isn't holding the charge during the last couple of weeks.

I'm at a complete loss now, having looked at everything fuel delivery related and electrical. and I don't want to just throw parts at it. Being an intermittent issue, the problem doesn't seem to last long enough to get a multimeter on to track down. I'm not looking forward to snow plowing my 400' driveway with this issue again this Winter. Any help and direction will be greatly appreciated.

Pete

It would be really nice if you would post what the problem turned out to be. I had the same problem and through internet searches I found the problem. Fuel related. Blasted air through the lines and problem solved. All it cost me was 15 mins of search time. I rarely ask a question because most issues have already been answered somewhere in cyber space. Would be nice if everyone that asks a question about a problem would also post the solution. Pay it Forward!! Peace