FEL or 3PTh to lift?

KiotiJohn · May 17, 2006

( I thought about it, and I believe that you could pull against something that is too big all day w/o damaging anything. )
That's pretty much true I think, but there is always the possibility that the pressure relief valve could malfunction. That is the main reason it's a good idea to just stop as soon as you realize the load is too heavy. PR valves generally have a spring mechanism in them, and these can sometimes fail for various reasons.

Just hitting the stops for short periods is not a problem, but try not to maintain that position for long periods, it's just not healthy for the system.
John

KiotiJohn · May 17, 2006

( I thought about it, and I believe that you could pull against something that is too big all day w/o damaging anything. )
That's pretty much true I think, but there is always the possibility that the pressure relief valve could malfunction. That is the main reason it's a good idea to just stop as soon as you realize the load is too heavy. PR valves generally have a spring mechanism in them, and these can sometimes fail for various reasons.

Just hitting the stops for short periods is not a problem, but try not to maintain that position for long periods, it's just not healthy for the system.
John

N80 · May 17, 2006

I think that the fluid can overheat if you keep forcing the pressure relief valve. That's what my manual says anyway. I do not know the consequences of overheating.

N80 · May 17, 2006

I think that the fluid can overheat if you keep forcing the pressure relief valve. That's what my manual says anyway. I do not know the consequences of overheating.

KiotiJohn · May 17, 2006

( I think that the fluid can overheat if you keep forcing the pressure relief valve. That's what my manual says anyway. I do not know the consequences of overheating. )
That's part of what I'm talking about in not hitting and staying at the stops. The fluid gets hotter when the pressures are up around top a lot of the time. Overheating the fluid can lead to damaged seals in the pump, an expensive proposition.
John

KiotiJohn · May 17, 2006

( I think that the fluid can overheat if you keep forcing the pressure relief valve. That's what my manual says anyway. I do not know the consequences of overheating. )
That's part of what I'm talking about in not hitting and staying at the stops. The fluid gets hotter when the pressures are up around top a lot of the time. Overheating the fluid can lead to damaged seals in the pump, an expensive proposition.
John

texasjohn · May 17, 2006

I differentiate between lifts and pulls. If I am lifting evenly a FEL load, the hydraulics will cut out if it is too heavy. I occasionally do a "light lift" using chains on only one side of my FEL... but am aware that this is not an even lift and could, possibly, if too much stress is placed on it, twist the FEL arms beyond the return point. What I never do is a pull with chains attached to the FEL if I think it is at all heavy. Doing a pull of this type the relief valves are not involved since it is the tires... reverse usually... that are doing the pulling and thus large forces are placed on the FEL bucket hudraulic arms by the pull. And, a sideways pull runs the risk of torquing the arms out of position. A heavy chain pull is best done using the draw bar under the tractor, between the rear wheels. That drawbar is there for that exact purpose. And, it is low down.... which minimizes the chance of flipping the tractor backwards when the pull is very heavy.

texasjohn · May 17, 2006

I differentiate between lifts and pulls. If I am lifting evenly a FEL load, the hydraulics will cut out if it is too heavy. I occasionally do a "light lift" using chains on only one side of my FEL... but am aware that this is not an even lift and could, possibly, if too much stress is placed on it, twist the FEL arms beyond the return point. What I never do is a pull with chains attached to the FEL if I think it is at all heavy. Doing a pull of this type the relief valves are not involved since it is the tires... reverse usually... that are doing the pulling and thus large forces are placed on the FEL bucket hudraulic arms by the pull. And, a sideways pull runs the risk of torquing the arms out of position. A heavy chain pull is best done using the draw bar under the tractor, between the rear wheels. That drawbar is there for that exact purpose. And, it is low down.... which minimizes the chance of flipping the tractor backwards when the pull is very heavy.

N80 · May 17, 2006

That's a good point about using the tractor and the hydraulics. It seems like most of the time that the pressure relief valve actuates is when I'm pushing against something using the whole tracotr and lifting with the FEL hydraulics, particularly trees ansd stumps.

N80 · May 17, 2006

That's a good point about using the tractor and the hydraulics. It seems like most of the time that the pressure relief valve actuates is when I'm pushing against something using the whole tracotr and lifting with the FEL hydraulics, particularly trees ansd stumps.