BX 23 Transmission Problems

[rickoshay]

HST Problems. I have a 2005 BX23 that has had two transmission failures. The first failure was at 176 hrs and the one yesterday was 89 hours later.

I was using the backhoe for approximately an hour when I return to the storage area and park the tractor outside. At that point everything seemed to be working fine.

After about 4 hrs I went out to park the tractor in the pole barn and experienced problems with the engine wanting to stall when engaging the directional petal. I then checked fluid levels and found everything to be OK.

I then tried again going forward and reverse experencing the same problem. Engine even wanted to stall when the transmission was in the neutral position and engaging the directional petal.

Does anyone have ideas what is causing these failures.

 

[CHDinCT]

First guess would be plugged up fuel filter(s). When was the last time you changed them? Did you recently refuel it? Maybe a bad tank of diesel. From what you're describing, it sounds like it's stalling out under even a slight load which sounds like a fuel issue.

 

[rickoshay]

HST Problems. I have a 2005 BX23 that has had two transmission failures. The first failure was at 176 hrs and the one yesterday was 89 hours later. I was using the backhoe for approximately an hour when I return to the storage area and park the tractor outside. At that point everything seemed to be working fine. After about 4 hrs I went out to park the tractor in the pole barn and experienced problems with the engine wanting to stall when engaging the directional petal. I then checked fluid levels and found everything to be OK. I then tried again going forward and reverse experencing the same problem. Engine even wanted to stall when the transmission was in the neutral position and engaging the directional petal. Does anyone have ideas what is causing these failures.

 

[Deano]

Fuel filters the first thing I thought of also.

 

[CHDinCT]

Oh yeah, and make sure the brake is off :laughing:

 

[bcp]

... the engine wanting to stall when engaging the directional petal.

Seat safety switch malfunction? Mine will have those symptoms if I move the pedal when standing beside the tractor.

Bruce

 

[tommu56]

Seat safety switch malfunction? Mine will have those symptoms if I move the pedal when standing beside the tractor.

Bruce

I'm with him interlock problems, not the transmission,

 

[Newfydad]

Yeah, sounds like it could be dirty contacts in the switch under the bottom of the seat. The switch senses the weight of the operator and if the operator is not sitting in the seat ( or the switch contacts are dirty), the engine will shut off if either the forward or reverse pedal is depressed.
As a temporary fix, you could short the contacts in the plug that attaches to the switch. If the stalling problem is resolved, then you should clean, repair or replace the switch.

 

[tommu56]

I would remove the fuse or wire off the solenoid for the interlocks and see what happens.

Doing this you wont bee able to stop the engine but will prove the safety circuit is the problem hook it all back up to shut it down.

tom

 

[ericher69]

Sounds like the engine is loading up when depressing the treadle?

Will the tractor roll in neutral?

What was the cause of the two previous failures?

My previous tractor (case 446) had this issue in the winter once...turns out there was water in the hydraulic oil that caused the transaxle to freeze up.

 

[rickoshay]

The Dealer told me they split the case and found that the hydralic pump was worn. They replaced the transmission and told me they had never seen this kind of problem. In both cases the failures occurred after using the backhoe. After completing the work the machine ran fine, It wasn't until shutting the tractor off and returning hours later that these symptoms were obvious.

Again, I would appreciate your ideas!

Tom

 

[oldnslo]

Is the tractor stalling be cause it is under load or just shutting off like turning the key?

If like turning the key would suspect one of the safety switches is not operating.

If stalling the engine due to load, must have some mechanical binding in the tranny. Will the tractor roll when in neutral? I.e push it by hand are the wheels locked?

If the tractor rolls freely in neutral and stalls the engine while depressing the go pedals sounds like gear jammed/broke in the motor output assembly.

 

[rickoshay]

Thanks for all the help. I went out and wired brush the connection for the sensor under the seat. I previouly checked that connection but thought I would revisit it. When I put the seat back down I noticed some kind of switch near the seat belt. After further examination I realized this was the switch with the spring
lever that work as a safety switch had broke off the seat. I then started the engine while moving the lever and all is well.

I appreciste all your help.

Rickoshay