So I have a VAC with Eagle hitch and a salvaged loader someone put on. Currently the engine mount pump feeds, in order, the bucket tilt dual action valve, the lift arms single action valve, then the factory hitch valve, then return to tank. All in series.
Now when I try to lift the hitch, it does lift but pressure also builds in the lift arm cylinders causing the bucket to lift. It becomes a dance of lowering the bucket while lifting the hitch.
My question is, is this normal for a spool valve to allow the back pressure into the cylinder or is the lift arm spool valve faulty? I understand from the VAC shop manual that a selector valve is generally used when adding a loader to the factory hydraulic system. Is this the only way to ensure normal operation of both the loader and hitch?
Thanks, Mike
Now when I try to lift the hitch, it does lift but pressure also builds in the lift arm cylinders causing the bucket to lift. It becomes a dance of lowering the bucket while lifting the hitch.
My question is, is this normal for a spool valve to allow the back pressure into the cylinder or is the lift arm spool valve faulty? I understand from the VAC shop manual that a selector valve is generally used when adding a loader to the factory hydraulic system. Is this the only way to ensure normal operation of both the loader and hitch?
Thanks, Mike
