Hello, this is the first time I’ve tried to reach out for help so I’m going to be as specific as I can on this help post. My tractor is an old BX22D 2175hrs early 2000’s model pretty much the same as a bx2200 but mine has a backhoe and loader. I’ve owned it for 5 years or more. This is my issue. Every time I push into a pile of dirt or push a load it stops and grinds, then I let off and I can drive around but any load it just does the same thing. Doesn’t matter in 4wd or high or low range. no tire spin hydro fluid is full and was changed in the spring. My opinion is I have ground a gear down to the point where it’s just toast but I’ve also never ripped into a hydro static transmission before. If there is any advice or a good breakdown tutorial of what others have done I would greatly appreciate it. Thank you.
BX22 transmission grinding under load.
- Thread starter Jon-BX22
- Start date
The propellor shaft (hydrostat input) shaft has two ball couplers on it that allow shaft misalignment. If the hst cooling fan stops when this happens, that's probably the cause.
I only know this from reading other folk's posts. Those couplers aren't maintenance points so, when the original grease is gone, they wear out.
North Idaho Wolfman
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Th
Another know cause is the coupling stripping and slipping.
This is the joints that @PoTreeBoy is talking about.
Another know cause is the coupling stripping and slipping.
Welp here’s the update I did both front and rear shaft joints all new everything except the actual shaft… still doing it. But I did a little test I just let it grind as I was pushing on an tree and the backhoe hydraulics still function as normal. So i believe the shaft wasn’t the issue. Because the pump is still turning. So I was gunna pick your brains one more time and then it’ll off to the stealership. Thank you for the help.
North Idaho Wolfman
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Troubleshooting sounds via text is near to impossible so, make a video of it making the grinding sound, post it on youtube, then give us a link to see/ hear it.
Ok update on the old bx22. I changed the hydraulic fluid and filter as recommended by the dealership. Now it’ll barely make it up the hill to my shop so got worse. The fluid coming out was very dark…It just acts like it’s slipping/rapid popping but during that rapid popping the FEL still raises like I’m standing still. So I believe the pump is still working. I was wondering if there was a drive that the pump supply’s? That’s not the whole hydrostatic system. According to my knowledge the hydrostatic system is pretty stout and I’ve never raised hyd pressures so I don’t think it’s that? Any ideas would be helpful. Granted it does have 2100 plus hours of use so it has been heavily used
Did you also change the coupling in the second picture of post #3? I'm pretty sure the FEL hydraulic pump is not driven through the drive shaft.
On a bx everything is driven off the propeller shaft. Hydraulic pump is on the transmission. Sounds like hydrostat is going out
whitetiger
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The entire BX series has a hydraulic pump that supplies the steering, loader, and three-point hitch.
Return oil from the steering circuit is used as charge pressure for the hydrostat pump.
The hydraulic pump and HST pump are two separate pumps.
A simple test to see if your hydraulic pump is working satisfactorily is to raise the loader while trying to move the tractor. If the loader raises while the HST does not drive the tractor, your hydrostat pump-motor assembly has failed.
Return oil from the steering circuit is used as charge pressure for the hydrostat pump.
The hydraulic pump and HST pump are two separate pumps.
A simple test to see if your hydraulic pump is working satisfactorily is to raise the loader while trying to move the tractor. If the loader raises while the HST does not drive the tractor, your hydrostat pump-motor assembly has failed.
Yes unfortunately I can say I officially killed the HST after 2100hrs of hard use did pressure tests checked bad and pointed to the HST.. so now my next question is. Should I rebuild it? I consider myself a mechanically inclined person but I’m not a transmission/engine builder guy, so take that for what it is.. Or is it possible to just find a good used one? I looked on a few sites and there upwards of 2700 bucks. I appreciate all the help through this process.
Most dealers wont touch rebuilding a hydrostat. Ive known several customers who have attempted to rebuild a hydrostat. Some with success some not. Some worked for a short time then failed again. I have a couple good used hydrostats. Ill send you a message
I'm in your area, used to work at RVT in conway
they can be rebuilt, but dealers don't really like doing that due to the time it takes to do it, and the "liability" (if it fails after a rebuild, it's on the dealer....if it fails after a replacement, it's more likely on the manufacturer or the owner. Due to the cost of things anymore, that's just the way it is, and it's I'll agree that it is indeed unfortunate. And, the dealers in this area are in the business of making money more so than helping you; at least that is the way I felt about it. Wasn't that way when Duncan had it but all great things must come to an end at some point.
I don't have the space to do anything at the house; sorry. I wish I was more help. I have to pay people to fix my stuff now. My mower is at the dealer at Mt View getting serviced if that's any clue.
Pull the fenders, floor, fuel tank. Pull everything off, slowly. Pull the entire transmission out and start pulling it apart. I suspect that you'll find that the HST pistons are trashed. If there is metal shavings inside the trans case, you'll want to get all that stuff out as not to contaminate the new stuff.
they can be rebuilt, but dealers don't really like doing that due to the time it takes to do it, and the "liability" (if it fails after a rebuild, it's on the dealer....if it fails after a replacement, it's more likely on the manufacturer or the owner. Due to the cost of things anymore, that's just the way it is, and it's I'll agree that it is indeed unfortunate. And, the dealers in this area are in the business of making money more so than helping you; at least that is the way I felt about it. Wasn't that way when Duncan had it but all great things must come to an end at some point.
I don't have the space to do anything at the house; sorry. I wish I was more help. I have to pay people to fix my stuff now. My mower is at the dealer at Mt View getting serviced if that's any clue.
Pull the fenders, floor, fuel tank. Pull everything off, slowly. Pull the entire transmission out and start pulling it apart. I suspect that you'll find that the HST pistons are trashed. If there is metal shavings inside the trans case, you'll want to get all that stuff out as not to contaminate the new stuff.
I appreciate the info i think im gunna go the used HST route maybe it’ll buy me a few more years before I send it off.