karmakanic
Silver Member
- Joined
- Jun 25, 2002
- Messages
- 232
- Location
- NE Texas
- Tractor
- Kubota L35 TLB, John Deere 550 dozer, Cat D-2 dozer, Allis Chalmers HD-11 dozer
I have a question about relief valve placement in a typical tractor hydraulic system, like as used on a FEL.
Say I have a loader that will lift 2k lbs. What would happen if I lifted an empty bucket 3 feet off the ground and then dropped a 4k weight in it. Would the loader hold it, if a line or seal didn't blow? Or would it slowly sink to the ground as a relief valve opened up and bled off the pressure. Would it make any difference if the tractor was running or not? And with the tractor running, would it make any difference if the operator attempted to raise the bucket as the 4k weight was applied or if he left the control in the neutral position?
Just wondering about this. I understand hydraulic systems in general, but wondering how the specific design works on something like a FEL that's subject to induced loads in combination with external shock loads. I would think the system would be plumbed so the relief valves are active under all conceivable conditions, but would like to hear yay or nay or any other thoughts on the matter.
Thanks,
Dave
Say I have a loader that will lift 2k lbs. What would happen if I lifted an empty bucket 3 feet off the ground and then dropped a 4k weight in it. Would the loader hold it, if a line or seal didn't blow? Or would it slowly sink to the ground as a relief valve opened up and bled off the pressure. Would it make any difference if the tractor was running or not? And with the tractor running, would it make any difference if the operator attempted to raise the bucket as the 4k weight was applied or if he left the control in the neutral position?
Just wondering about this. I understand hydraulic systems in general, but wondering how the specific design works on something like a FEL that's subject to induced loads in combination with external shock loads. I would think the system would be plumbed so the relief valves are active under all conceivable conditions, but would like to hear yay or nay or any other thoughts on the matter.
Thanks,
Dave