3-Point Hitch Kubota M7040 Hydraulic

[Treesanddust]

I have not had this issue on the 7040 either.
Have you checked the hydraulic fluid level?
The hydraulic dipstick is on the rear of the tractor above and to the right of the pto area.

 

[waggy5]

Fluid levels have been checked several times/daily. You can hear the hydraulic pump working with the loads. When you back up, the winch will raise back up to a certain point or all the way. Then when you proceed forward, the winch will lower down. Also, if the trees you are hauling snag something, the load will cause the winch to lower and that is why I am trying to figure out if there is a safety relief valve/system. I would like to test the hydraulic pump out to see if it is putting out the claimed rated flow at pressure. Or upgrade the pump with something bigger/better. Also, it seems like the loader does not lift as much as what it states. I have it in the power setting and not the height setting. Thanks for all your input!

 

[Chilly807]

There IS a safety valve on the 3-point system. It's designed to do what you've described if there is too much induced load on the 3 point, as in something heavy falling on it or being loaded by an external means.

I've never heard of one being activated, but there could be a problem with yours. You'd need a high pressure source to check it, something capable of generating at least 3500 psi. Kubota recommends using an injector test pump for this.

Once the 3 point is at a given height, the main relief valve should have nothing to do with lowering it. Fluid should only flow to/from the lift cylinders when the position control is active, unless the safety valve is opening.

Sean