valve 28 is configured such that a pressure signal from either the head conduit 40 or the rod conduit 42 whichever is at a higher pressure is passed to the first port 48 a second port 50 of the second control valve 30 is in fluid communication with the head conduit 40 a third port 52 of the second control valve 30 is in fluid communication with the pressure chamber 46 of the poppet valve 26 an orifice 54 may be provided between the pressure chamber 46 and the third port 52 to dampen movement of the poppet valve 26 the second control valve 30 has a first position in which the first port 48 is in fluid communication with the third port 52 whereby the pressure chamber 46 is in fluid communication with the shuttle valve 28 the second control valve 30 has a second position in which the second port 50 is in fluid communication with the third port 52 whereby the pressure chamber 46 is in fluid communication with the head conduit 40 in the illustrated embodiment the second control valve 30 is biased toward the first position by a spring 58 and the second control valve 30 is biased toward the second position by a solenoid 56 fig3 illustrates a second embodiment of the hydraulic circuit 20 that is similar in configuration to the first embodiment with a distinction in the manner in which the second control valve 30 is actuated as illustrated in fig3 a.