... Bolev Hydraulics:Bolev welcomes your visit!HRS-03 2 way 3 position foot control valve, it is used for convert a excavator ... /concrete breaker. it works as:3 ports, P port in, A port out, T port return line;position 1, P port to ... T port, direct to return line, breaker does not work;Position 2, P port to A port, breaker valve starts to ...