no lift

[J_J]

I understand now, that some tractors at idle do not have sufficient fluid for attachment operation.

If you have a flow divider for steering, you might not have enough fluid at idle for lift.

At 2000 rpm sitting still, are you saying that you have no lift?

 

[k0ua]

I can fill in a couple of the blanks.. I used to own a B7500. There are NO cables. the joystick connects directly to the valve. The machine will easily move the arms and bucket at idle, of course not at the same speed they would move at high RPM's, but they will move at a useful rate. You should easily raise the front end of your tractor off of the ground by placing the bucket vertical and then lower the main lift arms. If you cannot do all of the above, then you have an issue. Check hydraulic fluid level, and when was the last time the hydraulic filter was changed? Also a leak in the suction line going to the pump can allow air to ingress into the pump and would perhaps cause these issues.

 

[yogi411]

I can fill in a couple of the blanks.. I used to own a B7500. There are NO cables. the joystick connects directly to the valve. The machine will easily move the arms and bucket at idle, of course not at the same speed they would move at high RPM's, but they will move at a useful rate. You should easily raise the front end of your tractor off of the ground by placing the bucket vertical and then lower the main lift arms. If you cannot do all of the above, then you have an issue. Check hydraulic fluid level, and when was the last time the hydraulic filter was changed? Also a leak in the suction line going to the pump can allow air to ingress into the pump and would perhaps cause these issues.

Thanks for the help .this site is great. I did some more checking n itseems start when I am stopped with the brakes engaged that's when the loader loses its down force .when I let off the brakes and am still parked it works maybe a safety thing brakes get priority ?

 

[k0ua]

Yogi, explain what you mean by "loader looses it's downforce" If you are trying to lift the front end of the tractor off of the ground and you have the brakes engaged it is possible that the tractor will not rotate around the rear axle as the brakes would prevent that. But otherwise the brakes are purely mechanical and have no hydraulic component, and would not affect the operation of the lift hydraulics at all.

 

[J_J]

We don't seem to be communicating here.

What kind of pressure do you have at relief pressure.

Do your lift arms descend on their own?

Your full pressure hyd is at the far right. You are in regen in the first part of the valve.