BX2660 PTO losing power?????

[Deaharm]

Hello all,

I need help!!! First off, my bx2660 has been nothing but problems. I have lost count at the number of fuel filters I have replaced just to keep it running, have taken tank off and cleaned, tried fuel additives, etc, but still have to constantly replace the filters. But, my reason for todays post is due to the pto; a few weeks ago while mowing the pto seemed to lose power eventually to the point that the mower stopped completely. Prior to this I had noticed that it was taking around 7 to 8 seconds for the pto to engage. The tractor has been serviced at recommended intervals with kubota filters and super udt; belts are new and tight and deck has been greased regularly as recommended. I again changed the hydraulic fluid, filter and cleaned the screen and the problem persists. It usually takes about 45 minutes of mowing before it loses power. An ideas or suggestions would be greatly appreciated. The tractor has about 360 hours on it.

 

[94BULLITT]

Does the tractor smoke or run rough when it loses power? Is the air filter clean? What rpm are you mowing with it? Are you using a mid mount mower?

 

[radioman]

interesting. I never known the BX's to give issues like yours. your statement of replacing many fuel filters does it help to run better afterwards ? which pto are you referring to that losing power? does engine cuts out or runs fine when pto loses power? which one did you replaced one by engine or one under the carriage? or both? Did you try clearing your fuel lines with compressed air when you replaced the filters? where did your diesel come from? Are you sure the filters are getting plugged? Have you replaced the fuel pump yet? This sounds like your issue. I assumed you check the air filter too?
too many questions in my head here from your short statement and we want to help.:confused2:

 

[craigbaill]

Is this a new tractor? Are you using Bio Diesel? I have heard that Bio Diesel will clog filters QUICK as the bio diesel will flush all the old regular diesel" gunk" out of the fuel system. Others may chime in to add info or to correct me as I might be wrong. I agree that this is an odd issue.

Best of luck with this and please post when you get this figured out.

 

[pdowling1]

I would find a new fuel source! This is NOT typical.

 

[Deaharm]

As for the fuel system, the tractor will lose rpms and gradually pick back up then lose rpms again; change both filters and it runs fine for a week or two then the same problem all over again; the fuel I run is off road diesel from a local dealer that I switched to thinking that it may be bad fuel; yes the air filter has also been replaced; the only smoke I am noticing is when the engine starts to pick up rpms again and it is a small amount of black smoke. The pto losing power is the mid pto when using a kubota 60" belly deck and happens after mowing for 45+ minutes, the engine is not losing power and maintains rpms when the pto loses power; I usually mow at around 3000 rpms. I have not checked the rear pto for a loss of power.

I did not think about blowing out the fuel lines, will try that. Have not changed the fuel pump. The rear fuel filter was was discolored as compared to the front filter which appeared to be clean.

 

[radioman]

The rear filter would be discolored from the off road dye I believe. If your engine runs fine but the deck doesn't, I am at a loss why would you think its the fuel system? The deck with mid pto and its nearly bulletproof. Have you checked your hydraulic level in rear orange dipstick? I wonder if the deck belt is bad for some reason (highly unlikely since they are one of the best type of belts for mowing as its a V twin belt). I wouldnt worry about the fuel pump just yet as you mentioned engine runs fine.
Lets troubleshoot a few more silly things - just to get them out of the way. Have you greased the mower deck every 10 hrs or so? there is about 12 zerks total if my memory is right. is the mower gear box full with gear oil to second fill plug? have you checked the mower blades to make sure its on tight and both cupped washers are pointing right way onto the blades on all 3 ? When was the last time you had the mower blades off and inspected inside the 3 metal grease shield for debris or string or something to slow it down?

 

[Danner]

To be fair to Kubota, the fuel filter issue has nothing to do with Kubota and everything to do with the fuel you are using.

PTO power is another matter. A delayed engagement is pretty typical, but loss of power is not. Assuming the hydraulic oil level is correct, I would suspect the PTO circuit relief valves, but this might be best checked out by a certified Kubota mechanic.

 

[94BULLITT]

As for the fuel system, the tractor will lose rpms and gradually pick back up then lose rpms again; change both filters and it runs fine for a week or two then the same problem all over again; the fuel I run is off road diesel from a local dealer that I switched to thinking that it may be bad fuel; yes the air filter has also been replaced; the only smoke I am noticing is when the engine starts to pick up rpms again and it is a small amount of black smoke. The pto losing power is the mid pto when using a kubota 60" belly deck and happens after mowing for 45+ minutes, the engine is not losing power and maintains rpms when the pto loses power; I usually mow at around 3000 rpms. I have not checked the rear pto for a loss of power.

I did not think about blowing out the fuel lines, will try that. Have not changed the fuel pump. The rear fuel filter was was discolored as compared to the front filter which appeared to be clean.

So your engine is running fine, the pto is just engaging and disengaging? If that is what is happening blowing out the fuel lines will not help and the same for changing filters.

 

[kuboman]

Your fuel filter issue is not a Kubota problem but bad fuel. You could change the electric pump as it might be getting weak but obviously your fuel is dirty.Your pto problem is a kubota problem. You have an internal leak in the pto clutch pack. As the oil warms and thins the leak gets worse to the point the clutch is slipping.

 

[Deaharm]

There are 2 seperate issues with the tractor. The first is the fuel filters and loss of engine power that resolves when I change fuel filters but it only lasts a week sometimes 2 before occurring again. The 2nd issue and the most concerning is with the mid pto losing power and occasionally completely stopping; the engine is running normal when this happens. The hydraulic fuid level is full as I just changed the fluid and rechecked the level after running for awhile; belts are new v belts from kubota; deck has been greased regularly; will check the gear box level and sheilds under the deck. I hoped someone had this problem before and it would be something I could repair; if not I will schedule a date for it to go to Kubota. I greatly appreciate the help and suggestions from everyone.

Has any come up with a way to install at better fuel filter like a spin on?

 

[94BULLITT]

If you are having problems with fuel filters it is because you are either buying dirty fuel or your fuel containers are dirty. If you are having this much problem you may need to clean your tank and blow out the lines. I would also clean my fuel containers. I don't know what to tell you on the pto problem. I don't know if somebody on here has a workshop manual and they could help you.

 

[Vector]

i'm getting the same problem w/ my bx2350. happened last year, i hear that mold grows in the plastic tanks, and ididn't mow much as this summer put my grass into dormancy. i'm struggling w/ similar issues.

 

[keyman1808]

I do not know about where you live but up here off road diesel and home heating oil has a bio mix. I only use diesel from a dealer with high volume so I know its not sitting around. On the PTO problem could the lever not be adjusted properly and vibrates back to far ?? Dont really know if thats possible as I just sold my BX and cant go out and check. If not then I would definately say its an internal problem for Kubota to check and fix

 

[Leejohn]

Are you over greasing? I done that on my 990 mower and the belt would just slip.

 

[pommedude]

hi all, Has anyone ever found the reason for the hesitation in mower deck engagement in a kubota bx2660? It can be engaged and then 5 seconds later engages. Anyone had problem and know the repair?

 

[radioman]

How are you engaging pto? I always hold it a couple fingers just before full on for 10 second or so and it will slowly spin up and go full on without luggin engine.

 

[94BULLITT]

How are you engaging pto? I always hold it a couple fingers just before full on for 10 second or so and it will slowly spin up and go full on without luggin engine.

Mine seems to engage all at once not matter how slow I engage it.

 

[Maestro71]

If I remember right the off road diesel should never be used in these things.

 

[DT86]

If I remember right the off road diesel should never be used in these things.

Simply false information.