Bx25 backhoe sags when parked

[Chvypowa]

Hello,

I bought a low hr bx25 and noticed the main cylinder on backhoe boom will sag when parked (overnight a couple of inches). Is this normal? If not , how can I address?

Thanks!!

 

[boggen]

normal. hydraulics "leak over time" never ever count on hydraulics to hold something up.

general practice, is let things down "almost right to the ground but a couple inches away from ground.
turn off engine,
then go through all the levers / joysticks for FEL and backhoe. and let it all drop to the ground. and do so until they stop moving / pressure is released from the hyd system.

you might have a "backhoe transport lock" that holds the backhoe up in place. have seen many folks forget about the lock and rip the lock off / destroy the lock itself.

 

[dragoneggs]

Yep normal. What frustrating to me is during the storage of my BH off the tractor and on a dolly, the stabilizer feet slowly deploy making the BH bigger and harder to maneuver around. Have to connect up to the tractor to raise them up. Careful that you don't park the dolly such that it gets trapped because the legs sagged. I am now using some long cabinet making clamps to keep them upright. Tried some cheap zip ties and they stretched and broke.

 

[Soundguy]

yup, normal, might be weeping thru cyl seals or valve spools.

tractro 3pt is the same. if it hold position when off for more than a few minutes, it's usually 'operable'

leakdown during use is what you watch out for.

IE. say you scoop a bucket, lift it out of the hole, and as you swing over to dump, the boom is dropping and grounds before you swing over to dump.. now that's a bad leak you have to work on!

 

[bx25jim]

I have a brand new BX25D that has 31 hours on it, and when setting in the shop for a day, the backhoe bucket drops down to to the point where I have to raise it before I move the tractor. Its not setting on the ground, just uncurled. If the backhoe is off the tractor, I use a strap also to hold the legs up just in case they settle...its on a cart also. This from what I have seen and read, this is all normal. The pump is not running and keeping pressure in the lines. But if you have the engine running, and it does this....well thats an issue.

 

[JOHNTHOMAS]

The BX25 has two metal pins with hooks on their tops stored by the BH boom to insert into the holes to keep boom from dropping and one that keeps the boom from turning. One is longer than the other for the dropping boom.

 

[radioman]

I always leave my boom pin in when I leave the bh attached to my tractor for more then few days but I know I won't be using it and I think it's a good habit for everyone. The bx will squeal if you try to move boom and it never destroyed mine when I do that. Granted I never pushed lever a far it will go and keep holding it to see if it will hold, but a good operator will know there is something wrong with the feel.

 

[Soundguy]

I have a brand new BX25D that has 31 hours on it, and when setting in the shop for a day, the backhoe bucket drops down to to the point where I have to raise it before I move the tractor. Its not setting on the ground, just uncurled. If the backhoe is off the tractor, I use a strap also to hold the legs up just in case they settle...its on a cart also. This from what I have seen and read, this is all normal. The pump is not running and keeping pressure in the lines. But if you have the engine running, and it does this....well thats an issue.

pump running or not it will do that... once you position a cyl, then get off the spool valve, it is just the spool seal and the cyl seals to hold it...

the circuit is not being fed constant pressure from the pump.

3pt systems can use unloading and circuit regeneration to keep a sagging 3pt load lifted to near the same point, usually in a hunting or bobbing motion depending on the leak. circuit leaks, linkage signals repres of the system, then when in the correct position, circuit unloads.

that's differend from back hoe hyds and a multi circuit spool valve.

 

[HeLa]

Yep normal. What frustrating to me is during the storage of my BH off the tractor and on a dolly, the stabilizer feet slowly deploy making the BH bigger and harder to maneuver around. Have to connect up to the tractor to raise them up. Careful that you don't park the dolly such that it gets trapped because the legs sagged. I am now using some long cabinet making clamps to keep them upright. Tried some cheap zip ties and they stretched and broke.

i use a cheap rathet/binder strap or heavy duty tarp straps - they work great to keep the stabilizers contained.

 

[AStanton]

I think the technical term for this phenomenon is called "creep." The pic will show you how I dealt with the creep on my stabilizers in the garage.

 

[bx25jim]

pump running or not it will do that... once you position a cyl, then get off the spool valve, it is just the spool seal and the cyl seals to hold it...

the circuit is not being fed constant pressure from the pump.

3pt systems can use unloading and circuit regeneration to keep a sagging 3pt load lifted to near the same point, usually in a hunting or bobbing motion depending on the leak. circuit leaks, linkage signals repres of the system, then when in the correct position, circuit unloads.

that's differend from back hoe hyds and a multi circuit spool valve.

I understand what you are saying, but my point was, I could run the tractor for a few hours and not have it creep down. But let it set the same amount of time with out it running, and it would start to settle/creep. :thumbsup:

I also use the pins that are used to store the boom and keep it from swinging left to right when moving around. But the bucket itself does not have one. Thats the only one that will settle. I do however let all the pressure of my lines by moving all the levers as the book recommends. I dont have a problem with it doing what it does though unless it starts to get excessive. A good friend has a larger Kubota with a backhoe that does the exact same thing when not being used for a period of time. So no problems.....Jim

 

[Soundguy]

I understand what you are saying, but my point was, I could run the tractor for a few hours and not have it creep down. But let it set the same amount of time with out it running, and it would start to settle/creep. :thumbsup:

I also use the pins that are used to store the boom and keep it from swinging left to right when moving around. But the bucket itself does not have one. Thats the only one that will settle. I do however let all the pressure of my lines by moving all the levers as the book recommends. I dont have a problem with it doing what it does though unless it starts to get excessive. A good friend has a larger Kubota with a backhoe that does the exact same thing when not being used for a period of time. So no problems.....Jim

um.. the rate of creep setting should be less setting static than moving, assuming both circuits not powered. i'd think the moving running machine, due to vibration, might actually make creep worse.

now if you are using and constantly regenerating a circuit, then you are not compairing time to time.

if you take 2 identical machine that have the dipper circuit 'creep' at the same rate when off, and you raise both, then turn one machine off and leave the other running, but don't regen the dipper circuit.. they should hit the ground ABOUT the same time..

 

[bx25jim]

um.. the rate of creep setting should be less setting static than moving, assuming both circuits not powered. i'd think the moving running machine, due to vibration, might actually make creep worse.

now if you are using and constantly regenerating a circuit, then you are not compairing time to time.

if you take 2 identical machine that have the dipper circuit 'creep' at the same rate when off, and you raise both, then turn one machine off and leave the other running, but don't regen the dipper circuit.. they should hit the ground ABOUT the same time..

There again, all I can offer is my own observation as to what mine does. I admit, I know nothing of hydraulics except for knowing how to fix a leak if need be. Just letting the OP know that he is not the only one with a system that creeps when not used for a while. Thanks Jim....

 

[millsan1]

I used to have this problem, then I replaced the hydro oil with straight water, which is much thicker than oil, and I do not have the hydro leak down anymore. Plus, replacing the fluid in the trans, etc is now free! I just pull up the garden hose and fill er up! I am a genius.

 

[bBota]

I used to have this problem, then I replaced the hydro oil with straight water, which is much thicker than oil, and I do not have the hydro leak down anymore. Plus, replacing the fluid in the trans, etc is now free! I just pull up the garden hose and fill er up! I am a genius.

In freezing weather the leak down must be really slow!

 

[bx25jim]

I used to have this problem, then I replaced the hydro oil with straight water, which is much thicker than oil, and I do not have the hydro leak down anymore. Plus, replacing the fluid in the trans, etc is now free! I just pull up the garden hose and fill er up! I am a genius.

What weight water did you use? Was this the hard water or soft water? And just one more.....was it filtered or unfiltered before the install? We really dont have hard freezes here in the south, and may just have to try it....We have well water and it filtered.....No chlorine... Will that suffice.....

 

[xzcVAbc5]

BX25D owner here. My stabilizers will slowly leak down over time and the bucket will uncurl when it sets. No big deal.

Next time I take the BH off i'll do the strap thing. Last fall I ended up with some small hydro oil puddles on the floor from the stabilizers leaking down. I knew I should have put them down but I didn't want any more floor space taken.

 

[dragoneggs]

Yep on all points. 'Forget about it'.

 

[check]

Yep normal. What frustrating to me is during the storage of my BH off the tractor and on a dolly, the stabilizer feet slowly deploy making the BH bigger and harder to maneuver around. Have to connect up to the tractor to raise them up. Careful that you don't park the dolly such that it gets trapped because the legs sagged. I am now using some long cabinet making clamps to keep them upright. Tried some cheap zip ties and they stretched and broke.

Good point. I tie them together with nylon rope.

 

[Chvypowa]

Thanks guys, I feel better now.