SYSTEM / Hydraulic System Operation Control Circuit Swing Parking Brake Release Circuit Left Pilot Valve Travel Pilot Valve Right Pilot Valve Auxiliary Pilot Valve Swing Motor Shockless Valve Pilot Shut-Off Solenoid Valve Pump Control Circuit Signal Control Valve Hydraulic Oil Heat Circuit Pump Control Solenoid Valve 2 1 To Control Valve Spool Pump Regulator Emergency Boom Lower Circuit 2 1 Flow Combiner Valve Arm Flow Rate Control Valve Accumulator Bypass Shut-Out Valve Boom Anti-Drift Valve Fan Pump Control Solenoid Valve Arm Anti-Drift Valve SG Main Relief Valve SI Boom Flow Rate Control Valve Fan Pump Regulator Valve Control Circuit SF Boom Overload Relief Control Valve SC Control Valve Hydraulic Oil Tank Solenoid Valve Unit Travel Motor Swash Angle Control Circuit Suction Filter Travel Motor Travel Motor Pilot Relief Valve Pilot Pump Pilot Filter T1J1-02-04-001 T2-4-3