aczlan
Good Morning
- Joined
- Mar 7, 2008
- Messages
- 17,540
- Tractor
- Kubota L3830GST, B7500HST, BX2660. Formerly: Case 480F LL, David Brown 880UE
Snow Equipment Owning/Operating Pictures of your snow weapons
- Thread starter Timber
- Start date
- Views: 2311740
leonz
Super Member
If there was an overhang of salt there it would have buried the the loader to the top of the loader boom.
The loader boom has curve built into the design of the boom to allow the operator of the loader to raise the
bucket higher with shorter boom and shorter machine length. the same design is used in low profile underground load haul dump machines (LHD's)
It would also have the same effect if the overhang fell on the boom and bucket causing the loader to be pulled forward and down as the bucket is pushed down by the mass flow of material across the face of the salt stockpile.
We have had LHD's nearly flip when the operator was attempting to dig into a hard muck pile that was not completely broken up by the explosives due to a miss fire leaving an un exploded blasting cap not being detonated when the shots were fired at the end of the shift.
When salt is stockpiled without a free flow agent like "No Cake" it will continue to pack and compress in the stockpile and the salt is also attracting moisture the entire time as well causing the salt to congeal and become a near solid mass due to the natural crystalline nature in solar and rock salt. The salt will continue to settle and pack until it is reclaimed.
The loader boom has curve built into the design of the boom to allow the operator of the loader to raise the
bucket higher with shorter boom and shorter machine length. the same design is used in low profile underground load haul dump machines (LHD's)
It would also have the same effect if the overhang fell on the boom and bucket causing the loader to be pulled forward and down as the bucket is pushed down by the mass flow of material across the face of the salt stockpile.
We have had LHD's nearly flip when the operator was attempting to dig into a hard muck pile that was not completely broken up by the explosives due to a miss fire leaving an un exploded blasting cap not being detonated when the shots were fired at the end of the shift.
When salt is stockpiled without a free flow agent like "No Cake" it will continue to pack and compress in the stockpile and the salt is also attracting moisture the entire time as well causing the salt to congeal and become a near solid mass due to the natural crystalline nature in solar and rock salt. The salt will continue to settle and pack until it is reclaimed.
- Joined
- Aug 31, 2001
- Messages
- 65,962
- Location
- South Bend, Indiana (near)
- Tractor
- Power Trac PT425 2001 Model Year
I still don't understand why they just didn't push it back down with the hydraulics on the FEL itself? Maybe the engine shut off due to extreme angle. That could explain that, I suppose.
leonz
Super Member
I was wondering that myself, if it did not have open center hydraulic controls it must have pilot operated check valves on the cylinders or the 3 valve bank-most likely they are on the cylinders if they use them.
The weight of the loader would have forced the oil through the retract circuit on the valve body if the hydraulics were open center controlled.
He is just lucky it did not fall over when it was up in the air when he climbed out of the cabin as he would have been killed if he was not buckled in otherwise.
I have seen this happen quite often when operators try to do more than what the machine was designed to do.
The front end loader bucket is designed to be left on the ground when digging and the retract circuit controlling the bucket is used to force the heel of the bucket against the ground while digging to fill the bucket.
It all comes down to training and the lack of it as well as not knowing what the machine is designed to do and not to do as well as operating it properly.
Front end loaders are not designed to be used to knock down overhanging piles of mass flowing materials either.
I wonder if he still has a job?
The weight of the loader would have forced the oil through the retract circuit on the valve body if the hydraulics were open center controlled.
He is just lucky it did not fall over when it was up in the air when he climbed out of the cabin as he would have been killed if he was not buckled in otherwise.
I have seen this happen quite often when operators try to do more than what the machine was designed to do.
The front end loader bucket is designed to be left on the ground when digging and the retract circuit controlling the bucket is used to force the heel of the bucket against the ground while digging to fill the bucket.
It all comes down to training and the lack of it as well as not knowing what the machine is designed to do and not to do as well as operating it properly.
Front end loaders are not designed to be used to knock down overhanging piles of mass flowing materials either.
I wonder if he still has a job?
- Joined
- Aug 31, 2001
- Messages
- 65,962
- Location
- South Bend, Indiana (near)
- Tractor
- Power Trac PT425 2001 Model Year
I was taught not to leave the bucket on the ground when filling the bucket. You're supposed to have the bucket level with the ground, then, as you push into the pile, start curling and lifting the bucket as you move forward to crowd the bucket with material, using gravity to fill the bucket, not force.
herringchoker
Platinum Member
When I really need to get-er-done!
SR
I recognize the view over that hood. The 450 is a great little machine. I love mine.
Rustyiron
Super Member
Aaron, I know you and everyone else meant to call him the "driver", clearly he was not an operator.
:thumbsup:leonz
Super Member
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The reclaiming of a stacked stockpile of any ore is easier to do as the material is already broken and sized.
In a rock quarry or a mine face that has been shot its much harder to muck out a shot as the ore is not uniform in size and that requires the operator to leave the bucket on the ground and scoop and push into the pile to fill the bucket.
The bank run gravel gravel pit also requires one to work from left to right or right to left to correctly muck out the pit wall which cannot be grater than 20 feet in total height.
If the boom and bucket are left elevated it creates more force against the boom and it will eventually cause the welds used to connect the boom pieces together as one solid frame to weaken and crack. The boom stops that are welded on the axle stubs are also at play here as the boom should be lowered to the stops to prevent the boom and bucket from being pushed down on the axle stubs causing the casting to crack from the stress.
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Many covered stockpiles use a front end loader to push the material up a slope to to the roof line and to continue to stack it higher. They do this to avoid buying a stacking conveyor or using a tripper belt to fill the stockpiles.