. ATTACHMENTS AND OPTIONS MACHINE READY FOR ATTACHMENT Adjusting Oil Flow Depending on the attachment, it is necessary to change the oil flow in the service circuit. For details of setting the oil flow, see "ATTACHMENT OPERATIONS (PAGE 6-20)". Switching Between Breaker and General Attachment When a possible attachment (if equipped) is installed and B mode is selected: 1) The circuit becomes a circuit for breaker operation (1-way circuit). 2) The hydraulic oil flowing in the breaker circuit flows to the additional filter for the breaker. 3) The relief valve is set to a lower pressure. When shipped from factory:
20.6 MPa (210 kgf/cm 2 , 2980 PSI) 4) It is possible to adjust the maximum flow with the select mode. When a possible attachment (if equipped) is installed and A mode or E mode is selected: 1) The circuit becomes a circuit for crusher operation (2-way circuit). 2) The hydraulic oil flowing in the crusher circuit does not flow to the additional filter for the breaker. 3) The relief valve is set to a higher pressure. When shipped from factory: 27.4 MPa (280 kgf/cm 2 , 3980 PSI) 4) It is possible to adjust the maximum flow with the select mode.
6 - 14 HYDRAULIC CIRCUIT NOTICE NOTICE When a breaker is installed, it is necessary for the return circuit to return directly to the return filter, so always use B mode. Do no t use any other mode. he service valve safety valve is set as follows when the machine is shipped from the factory. MPa (210 kgf/cm2, 2982 PSI) 27.4 MPa (280 kgf/cm2, 3976 PSI) The st andard se t pressure of t he service valve safety valve i s set as follows when the machine is shipped from the factory. When B mode is selected: 20.6 MPa (210 kgf/c m2 , 2 982 PSI) When A or E mo de is selected: 27.4 MPa (280 k gf/cm2, 3976 PSI) Depending on th e attachment, it ma y be necessary to adjust the pressure.
I n this case, please ask your Komatsu d istributor to car ry out the adjustment. Switching Hydraulic Circu it ttachment, set the working mode on the monitor as follows. Depending on the type of a ttachment, set the working mode on the monitor as follows. The s et press ure of the service valve safety valve and the hydraulic circuit switch is according . vice valve safety valve an hydraulic circuit switch according mode selected to the working Attachment Working mode Hydraulic circuit Set pressure of service safety valve Breaker or other attachmen with one-way circuit t B mode Return circuit automatically switched so that it does not pass through control valve When shipped from factory:
20.6 MPa (210 kgf/cm2, 2980 PSI) Crusher or other attachmen with two-way circuit t A mode or E mode Return circuit automatically switched so that it passes through control valve When shipped from factory: 27.4 MPa (280kgf/cm2, 3980 PSI)