It is critical first to check that the maximum pressure that can be generated by the load is not higher then the maximum setting of the counterbalance valve fitted.
1. Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise.
2. Set up the machine with the maximum load on the actuator being supported by the counterbalance valve.
3. Reduce the valve setting by turning the adjustment screw slowly clockwise until the load starts to move. An extended allen-key wrench may be needed because the strong springs in the valve make them difficult to adjust under pressure.
4. Operate the machine to a condition where the counterbalance valve is no longer supporting any load.
5. Turn the adjust screw in fully (clockwise) to the minimum setting, counting the number of turns.
6. Add 30% to the number of turns and then re-set the valve (turn adjustment anti- clockwise) to this setting.
Re-torque the locking nut and fit protective cap if required.