Worried about my BX25

[tractorgp]

Since it acts the same hot or cold the transmission overheating due to a damaged fan isn't an issue I don't think.

It "might" be in the linkage since there seems to be no degradation in performance in reverse. I like to rule out the easy/simple stuff first.

Is the difference the same in high and low range?

The tractor responds better in high gear. But have been using it mainly in low gear because of what I was working on.

 

[tractorgp]

I have the same thing going on with my BX24. It would run at top performance for the first half hour or so and then it would get a little sluggish. Very noticeable especially when traveling about 300 ft from point A to point B. Dealer and regional rep worked and troubleshot and took measurements. Only thing they ended up doing was change out the hst piston and put one for a BX25. But now I have to run pretty much at full throttle (3500) to get the same speed as I had at 2700. Regional service rep said that was what is expected from those compact tractors.

Downside of it all...using a gps, before they did the work...I topped out at about 9.5-10 mph and then it would drop to about 7-8 mph and the speed did not vary from about 2900 - 3500 rpm. Then after the change, it consistently tops out at 8 mph, however it needs to be wide open at 3500 (yes, speed changes as engine rpm goes up and down).

BTW, manual says that top speed of BX 24 and 25 is 8 mph.

Hope this helps.

Mine is sluggish right from the get go and stays that way even after warming up. After reading all of the comments I now want to try measuring the mph at a specific engine speed (with the speed control to the floor). I will post the results in a few days (we have a snow storm headed our way so will have to wait for the area to clear up). Will hope then to get someone to do the same and to compare.

 

[tractorgp]

mechanic made an adjustment ?! sounds like he added a shim or two for HST relief valve as a easy way out. I think this is wrong. I was wondering how long does it take before you REALY can notice the issue? you said you were working BX hard for 2 hours and then it happened. I am not sure how far you are from dealer, but I would use the bota around house and then drive it down to them and say HEY! get on this thing and check the forward drive.

Let's see- have you dont the 50 hour service ? Have you tried to replace the HST filter and pull the mesh filter and check for foreign objects ? While you pull the mesh filter out, how does the oil feel ? Are you using UDT or SUDT ? (I know it shouldn't matter but just get all the facts down) Nobody said a thing about the fluid level. It should be somewhere in the hash part off the orange dipstick, but I prefer to keep it topped off at top of hash mark.

HST fan broken or not, I don't think its gonna cause a sluggish performance- you most likely would smell the hydraulic fluid first.

Yep done all the service on time and used Kubota supplied oil and filters. First thing I checked after the problem started was the fuild level and it was fine. Have been checking since then with no change.

 

[powerstroke444e]

Thus the reason we have a sticker on all our machines on the throttle lever WFO (wide open). Machines that are hydro's need Rated RPM to get proper flow and cooling to the pump.

 

[bp fick]

At this point, you'd have little to lose, but the cash, in changing the HST filter and fluid in the trans. Perhaps I missed it in reading, but do you have udt or sudt in there? You could even catch the old fluid in clean containers.

 

[bp fick]

Same when hot or cold. Not sure about the exact oil I used but I bought it at the Kubota dealer.

Again, just to set a base line here, You are unsure about whether you put sudt or udt in the trans at its 50 hour service, which I assume was the last time the fluid was changed?

 

[tractorgp]

Again, just to set a base line here, You are unsure about whether you put sudt or udt in the trans at its 50 hour service, which I assume was the last time the fluid was changed?

Just checked... I used "Kubota premium UDT". Also used Kubota filter. There was no detectable metal bits in the strainer. Yes, the last time the oil was changed was 50 hours.

 

[tractorgp]

Thus the reason we have a sticker on all our machines on the throttle lever WFO (wide open). Machines that are hydro's need Rated RPM to get proper flow and cooling to the pump.

I read you, but why would I get just perfect performance for 90 or so hours with the throttle adjusted to, what I perceived to be just right to do a particular job. i.e. no strain, lots of power, and "normal" speed when traveling.

 

[johnray13]

These tractors are so fuel efficient, I wouldn't worry about the tiny fuel savings by cutting your RPM's. You can run that tractor all day long at 3000 RPM doing front loader work and not even burn a tank of fuel.

Although the manual doesn't require it at 90 hours, I would also change out the fuel filters (remember, there are 2 on the BX). I just rolled over 300 hours (and 3 years) on my BX24 and the only change I have ever noticed was a lot more grease and grime on my machine!

 

[tractorgp]

These tractors are so fuel efficient, I wouldn't worry about the tiny fuel savings by cutting your RPM's. You can run that tractor all day long at 3000 RPM doing front loader work and not even burn a tank of fuel.

Although the manual doesn't require it at 90 hours, I would also change out the fuel filters (remember, there are 2 on the BX). I just rolled over 300 hours (and 3 years) on my BX24 and the only change I have ever noticed was a lot more grease and grime on my machine!

I agree, I'm amazed at how little fuel they use. Fuel is definitely not my issue.