Dealer suggested cavitation hand foaming. They suggested trying the new filter and checking the suction lines to the pump and the suction screen. What I don稚 understand is should there be fluid in the front section of the HST and if so how does it return to the sump? HST are not my experience though I have been working on equipment pretty much all my life.
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BX2200 Hydraulic fluid coming out HST Vent?
- Thread starter BxRich
- Start date
- Views: 12714
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- kubota bx2200
Smokeydog
Elite Member
Inleakage or vacuum leaks can be hard to find. Dealer may just start replace parts hoping for a fix. A good mechanic will try figure out the problem. You can have air inleakage with little external oil leakage.
Agree with the dealer diagnosis for now.
Not a big fan of the o-ring metal line connections like I have on the oil cooler.
Noticed the new suction line has 4 new screw type hose clamps for the rubber connections. The original line has two spring hose clamps. Easy enough to change. The new line has a new o-ring that going into rear sump block.
Might try coating externally each connection with something like silicone grease one at a time till it makes a difference. Repair/replace that piece. Then you can wash/wipe it off later. Other experience people may have good suggestions.
I will mark metal lines to be sure they are fully engage with the rubber components. I will be lubing with silicone vacuum grease metal barb to rubber hose connections and o-rings when I replace the suction line.
Agree with the dealer diagnosis for now.
Not a big fan of the o-ring metal line connections like I have on the oil cooler.
Noticed the new suction line has 4 new screw type hose clamps for the rubber connections. The original line has two spring hose clamps. Easy enough to change. The new line has a new o-ring that going into rear sump block.
Might try coating externally each connection with something like silicone grease one at a time till it makes a difference. Repair/replace that piece. Then you can wash/wipe it off later. Other experience people may have good suggestions.
I will mark metal lines to be sure they are fully engage with the rubber components. I will be lubing with silicone vacuum grease metal barb to rubber hose connections and o-rings when I replace the suction line.
Last edited:
moship
Veteran Member
Turns out there is no vent there, the HST housing is cracked... not what I was hoping for.
Sorry to hear about the cracked housing.
Any guess on what might have caused it?
Smokeydog
Elite Member
Tough break. Sounds expensive. Have repaired cracked covers before by drilling small holes at the ends of the crack(s) to stop crack migration and using JB weld. Sometimes just better to replace cover.
At least you now know the cause of the problem which is a big part of making repairs. Any idea how the housing cracked?
At least you now know the cause of the problem which is a big part of making repairs. Any idea how the housing cracked?
diesel85
Veteran Member
I haven't pulled the tractor apart yet. There is a place for an oil filter on the very top of the HST for a different application. The point where the nipple for the oil filter goes in to the HST is not milled through for the BX application.
It is my understanding that overheating can cause the case to crack at weak or stress points, which this must be one of.
To solve my immediate issue I went out and bought a brand new BX2680.
I have pulled the BX2200 in to the shop and will start the tear down as time permits. It has been a reliable friend for a lot of years. I am hoping I can resurrect it. Everything works as it should sans a couple of hydraulic leaks, the right front side of the steering cylinder has a tiny drip, the left front is leaking between the bevel gear case and the axle case.
I will update with more information once I get everything torn down enough to get a clear view of the top of the HST. Currently my information comes from using a bore scope to see what is going on.
I felt it wasn't worth the 10-12 hours of shop time the dealer quoted to tear down the tractor, the potential cost of a new HST (they don't sell the case separate; and the dealer doesn't put in used parts) and then the 10-12 hours reassemble time, plus all the miscellaneous seals/gaskets/parts involved. I can do the job, just hard to find the time to do it quickly, and I rely on the tractor.
The dealer did offer to loan me a tractor while it was in for service, which I felt was good customer service. In the end a new tractor seemed the best short term route. Once I get the old one up and running it can do the rougher tasks and leave the new one to the easy stuff.
I can't complain about the BX2200, it has done pretty much everything I asked it too within its limits (and maybe a bit over).
I suspect mowing in heavy grass covered the HST and the little fan couldn't keep it cool. I think I may add a transmission temp sensor once I get it repaired.
It is my understanding that overheating can cause the case to crack at weak or stress points, which this must be one of.
To solve my immediate issue I went out and bought a brand new BX2680.
I have pulled the BX2200 in to the shop and will start the tear down as time permits. It has been a reliable friend for a lot of years. I am hoping I can resurrect it. Everything works as it should sans a couple of hydraulic leaks, the right front side of the steering cylinder has a tiny drip, the left front is leaking between the bevel gear case and the axle case.
I will update with more information once I get everything torn down enough to get a clear view of the top of the HST. Currently my information comes from using a bore scope to see what is going on.
I felt it wasn't worth the 10-12 hours of shop time the dealer quoted to tear down the tractor, the potential cost of a new HST (they don't sell the case separate; and the dealer doesn't put in used parts) and then the 10-12 hours reassemble time, plus all the miscellaneous seals/gaskets/parts involved. I can do the job, just hard to find the time to do it quickly, and I rely on the tractor.
The dealer did offer to loan me a tractor while it was in for service, which I felt was good customer service. In the end a new tractor seemed the best short term route. Once I get the old one up and running it can do the rougher tasks and leave the new one to the easy stuff.
I can't complain about the BX2200, it has done pretty much everything I asked it too within its limits (and maybe a bit over).
I suspect mowing in heavy grass covered the HST and the little fan couldn't keep it cool. I think I may add a transmission temp sensor once I get it repaired.
diesel85
Veteran Member
I thought the EZ Checker indicators had a light for over heating of the transmission... I need to look at my manual...
In any event, good deal on the new machine!
Man, I love my little BX2200... have had it for 18 years now, and it has always been there for me. I want a bigger machine, but ugh, do I keep the little BX2200? Don't know yet.
In any event, good deal on the new machine!
Man, I love my little BX2200... have had it for 18 years now, and it has always been there for me. I want a bigger machine, but ugh, do I keep the little BX2200? Don't know yet.
Have torn down the compact beast mostly. The HST case is not cracked visibly from the outside. The oil definitely is coming out of the unused filter boss on the top. It turns out while the bottom of the boss is not machined out there is a passage going front to back on the tractor from the threaded boss to the back of the front HST case. This terminates in to the seal/gasket between the middle and front sections of the HST. This is where the oil is coming from.
In my mind one of three options present itself (well four but I am not wanting to consider the fourth). The first option is the bolts holding the two sections together have loosened, second option is the seal/gasket has failed internally, third option is the HST housing has warped a little from overheating. The fourth option I don't want to consider is that the HST Front housing is indeed cracked internally.
I could put a plug in the oil boss since it is threaded and leave well enough alone and hope the failure doesn't get worse. That however isn't the way I roll. I will be tearing things down a bit more and first checking the torque on the bolts. Failing them being loose I will step back take a deep breath, learn a whole lot more, the tear down more and pull the HST to find out what exactly is going on.
I will post pictures as I continue to progress. The tear down to get to the top of the HST wasn't too bad, took about an hour give or take. To get the HST out requires a lot more tear down. Will see how it plays out.
In my mind one of three options present itself (well four but I am not wanting to consider the fourth). The first option is the bolts holding the two sections together have loosened, second option is the seal/gasket has failed internally, third option is the HST housing has warped a little from overheating. The fourth option I don't want to consider is that the HST Front housing is indeed cracked internally.
I could put a plug in the oil boss since it is threaded and leave well enough alone and hope the failure doesn't get worse. That however isn't the way I roll. I will be tearing things down a bit more and first checking the torque on the bolts. Failing them being loose I will step back take a deep breath, learn a whole lot more, the tear down more and pull the HST to find out what exactly is going on.
I will post pictures as I continue to progress. The tear down to get to the top of the HST wasn't too bad, took about an hour give or take. To get the HST out requires a lot more tear down. Will see how it plays out.
Well, looks like the HST will be coming off. For starters you can't get to the allen screws that hold the two (mid and front) sections together without removing the HST. From looking at things I see no indication of oil from any other area of the seal.
Looks like time to dig in. Still hoping it is just the seal/gasket between the two sections but not feeling particularly lucky at this point. Will get the pictures off the phone and on to here later.
Anyone removed the HST unit? Most of it I can see pretty much what to do, have to look at the shaft from the engine to the HST and see how the comes off. I seem to recall seeing a video about that from someone replacing the fan. Just wandering if there are any gotcha's I need to be aware of.
Looks like time to dig in. Still hoping it is just the seal/gasket between the two sections but not feeling particularly lucky at this point. Will get the pictures off the phone and on to here later.
Anyone removed the HST unit? Most of it I can see pretty much what to do, have to look at the shaft from the engine to the HST and see how the comes off. I seem to recall seeing a video about that from someone replacing the fan. Just wandering if there are any gotcha's I need to be aware of.