front bucket dropping overnight

   / front bucket dropping overnight #1  

rhunt

Silver Member
Joined
Nov 8, 2015
Messages
227
Location
aiken sc
Tractor
kioti nx4510 hst
Own an NX4510 hydro w/cab. When I leave the bucket raised somewhat after shutting down for the day and in the next morning find the bucket now on the floor. This is no big deal to me but would like to know what causes this. Just to be clear, this has happened since the tractor was new and there is no leaks in the system, meaning no oil anywhere on floor, just to be clear. Anyone have a cure? Bob
 
   / front bucket dropping overnight #2  
Dunno, but why leave it up? Should be dropping it to the ground for the safety of anyone or anything that happens to wander by.
 
   / front bucket dropping overnight #3  
Slow 'bleed down" of your FEL/3PH over a matter of hours is a normal occurrence. It's just weight + gravity + lack of maintained hydraulic pressure due to the hydraulic pump being shut off.

Rapid 'bleed down' would be a concern.

I never leave any implements raised over night or for an extended period. I put a couple of 4x4's under the bucket/forks and lower the FEL onto them, then work the joystick in all directions to relieve the pressure. A 3PH implement simply gets lowered onto its wheeled pallet at the same time. Out in the field (haying season), both simply get lowered onto the ground for overnight.
 
   / front bucket dropping overnight #4  
every tractor does it.
I read the spec, for kubota i believe, is 1" drop per hour on a bucket. I think mine drops faster, but never timed/measure it - and the more weight the faster it drops, that I have observed.

Haven't seen my 3pt drop much - I know it drops some because it picks back up when the tractor starts to the setting on the control stick. the bucket/loader does not.
 
   / front bucket dropping overnight
  • Thread Starter
#5  
Thank you for your replies. I usually lower the bucket just as you all have done and know this is good practice, I was just wondering, that's all. Thanks again, Bob
 
   / front bucket dropping overnight #6  
The directional control valve leaks internally. Some valves bypass more than others. If you have bad seals in the cylinder, it would fall even faster. As long as you don't see any external leakage, and the leak down doesn't bother you, I would not worry to much. :thumbsup:
 
   / front bucket dropping overnight #7  
Definitely control valve leakage.

Impossible for the cylinders to cause this type of leakage. The internal cylinder seals aren't doing anything is this scenario.

My Kubota leaks down a little.

My 35 year old Ford doesn't leak down at all.

So, every tractor does not do this.

No worries if it doesn't affect operation.
 
   / front bucket dropping overnight #8  
I always put the bucket all the way down and curled up so none of the shiny part of the cylinder is exposed . My cylinders are not going to rust . Last thing I do after it's shut down is to move the stick in a round motion to take the pressure off everything .
 
   / front bucket dropping overnight #9  
Definitely control valve leakage.

Impossible for the cylinders to cause this type of leakage. The internal cylinder seals aren't doing anything is this scenario.

My Kubota leaks down a little.

My 35 year old Ford doesn't leak down at all.

So, every tractor does not do this.

No worries if it doesn't affect operation.

Piston seal leakage is often the cause of cylinder drift. More often than not manufacturers have an allowable drift spec published that gives them more than sufficient wiggle room to dodge all but the most egregious drift complaints. There is no doubt this is more of a problem with newer equipment than older.
 
   / front bucket dropping overnight #10  
Extending cylinder drift can be leakeage within the cylinder. Collapsing cylinder drift cannot be caused by leakage within cthe cylinder. The rod cannot go into the barrel because the fluid cannot be compressed. So collapsing drift can only happen if there is an external leak or valve leakage.
 

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