Does your 3-point take a hydraulic beating

KiotiJohn · Aug 27, 2004

( Either Kioti is different from the rest of the world or they are referencing to the position lock for the position control lever )
Well, I don't think it's Kioti that's different than the rest of the world Jerry. The certainly mean the 3pt drop speed control and even have a picture accompanying the text.
As you can see from the other posts, it's not just Kioti. John

MicroPilot · Aug 27, 2004

( Kioti Owner's Manual under section, "Using 3pt Hitch":
When transporting on the road, set the implement lowering control in the "LOCK" position to hold the implement in the raised position. John )

I don't have my manual in front of me to quote from, but it says essentially the same thing as KJ's.

PineRidge · Aug 27, 2004

My tractor has a knob that you can turn to close the 3PT valve to lock a load in the carry position. This valve also lets you regulate the speed the 3PT lowers. 

Naturally my New Holland is equipped with this feature as well but my thoughts are that if the valve is completely shut off with a heavy implement suspended in the air then the shock loads within the lift cylinders may be more prone to damage internal parts. I think the chances of that happening with a mechanical lock were minimized compared to the present set-up. What do you all think? /forums/images/graemlins/frown.gif

Food for thought.....

mwood · Aug 27, 2004

Are we absolutely sure that this shutoff cannot be bypassed if the check valve were to be activated? The most logical situation would be that this shutoff would hold the implement unless there was sufficient stress on the 3pt hitch. If the pressure on the cylinder exceeded the maximum rating, it would trip the check valve and the implement would drop a little.

Just want to be sure we completly understand the system here (and I'm curious too! /forums/images/graemlins/laugh.gif)

Golfgar4 · Aug 27, 2004

( What do you all think? )

Maybe a quick telephonic communication exchange with the dealer would be useful? /forums/images/graemlins/wink.gif

WVBill · Aug 27, 2004

Maybe the mechanical lock was there so you could raise an implement and lock it in place, shut down the tractor and work on the implement without worrying about leak-down.

slowrev · Aug 27, 2004

I have adjustable chain drop limiters on my tractor. Works great, supports my 3/4 ton counter weight well and I can set how low I want the front of my cutter to drop and not worry about it.
The chains hook to the top pin ends on the tractor rear and on the lift arms.

KiotiJohn · Aug 27, 2004

( I think the chances of that happening with a mechanical lock were minimized compared to the present set-up. What do you all think? )
I agree that a mechanical lock would be a good thing, but I don't think that turning off the drop control lets any pressure be applied to the cylinders. Once it is shut off, the position control would be moved into it's lowest position and I think the fluid is diverted back to the reservoir. Not sure of this, but looking at mine it seems that's what happens.
I'll try to get a response from a Kioti engineer on the mechanism of this. John

beenthere · Aug 27, 2004

I think I'd rather have the load from the 'bumps' on the hyd. oil system rather than on a mechanical lock mechanism. It would take a pretty healthy lock mechanism to hold that load mechanically.
At least, in all my years of 3pt systems (50+), never have felt a need to hold a 3pt load up with anything other than the hydraulics. /forums/images/graemlins/wink.gif

Steve_Miller · Aug 27, 2004

Here's my two cents worth. I don't think any manufacturer would allow the relief of the 3ph to be blocked in any manner. This could deadly to any 'o' rings, seals, shafts or whatever if overstressed by our abuse intended or not. First off if the load is too great for the 3ph, it will bypass and not lift the load. I'm sure we've all tried to lift something bigger than our tractors were capable of at some time or another. (I know I have) The bypass has to be in the circuit to protect. If not a bouncing 3ph backhoe (first thing I could think of) could in theory break the tractor in half, or as in a previous post (winch troubles) tear the top link housing clean off or rip bolts out. If the load becomes greater than the relief can handle 'I' think it will drop some distance, whatever that may be.

Steve