Hydraulic problem 8011

[elinjo]

Hi!

Zetor 8011 -73.

I have hydraulic problem again. I thought i had an "air lock" as you have explained earlier. I filled up oil(gear), I parked in a steep hill and opened the banjo nut. The hydraulic started to work again but soon it stopped again. Then, i tried this:

There are two levers to the right of the chair(connected to hydraulics over the rear axle). The one closest to the chair should normally be in the rear position to make the hydraulics to work. Now I have found out the following.

If the hydraulic does not work and I move the lever to the front position and then back to the rear position again, the hydraulic starts to work again.

Are there any valve connected to this lever?
Can I, in some way, adjust the valve?
Or do you have any good ideas?

Ragards, Hans

 

[dave_peters]

You have 2 levers to the right of the seat, the one nearest the seat is for external hydraulics only, that is only to the 2 couplings at the back of the tractor. this lever should be in its neutral position , that is the position the spring will return it to after you have moved it backwards.
The outer lever is for the hydraulic arms. foreward for down and back for up. The arms will not lift if the inside lever is in such a position that it is pumping oil to either coupling .

 

[elinjo]

Thanks Dave for the answer but I think I missed to explain one important thing.

I use a front loader which is connected to the 2 couplings at the back of the tractor. That's why I'm using the lever closest to the seat(inner lever). I usually keep the inner lever in the backward position with the "sliding locking nuts?".

The front loader has been working in that inner lever backward position and I can usually hear some blowing,whistling or whining noise (hard to discribe) when the hydraulics works.
It might be the sound of the hydraulic pump. But sometimes the noise disappears and the hydraulics does not work.

The strange thing is that if I move the inner lever in forward position for a while and then move it backwards and lock it in the backward position again, the hydraulics starts to work (front loader and hydraulic arms).

The hydraulic arms in the back works up and down with the outer lever only if the inner lever is in backward position and when the front loader also works.

I hope you can help me here. Can some valve suddenly get stuck in some position or can the pump be working every now and then?

PS! I also have a lever connected to the front loader. This lever is used to move the front loader up,down and to tilt.

Regards, Hans