MACHINE READY FOR ATTACHMENT ATTACHMENTS AND OPTIONS HYDRAULIC CIRCUIT 0. NOTICE The pressure in the attachment hydraulic circuit on this machine is set at 20.6 MPa (210 kgf/cm2, 2982 PSI), so check the ability of the attachment to withstand the pressure before installing it. Hydraulic Circuit Connection 0. When connecting the attachment, connect the hydraulic circuit as follows. 1. Check that the stop valve is at the LOCK position, then remove the plug. Be careful not to lose or damage any part that is removed. 2. Connect the piping for the attachment provided by the attachment maker. The thread size of the elbow installed to the stop valve is PF1/2.
REMARK If the elbow thread size does not match, please contact your Komatsu distributor. 3. After connecting the piping, bleed the air from the circuit. 1) Start the engine and run it at low idling for 10 minutes. For details, see "STARTING ENGINE ( 3-43 )". Then carry out the following operation. 2) Run the engine at low idling until the air in the attachment circuit is completely removed, then operate the attachment pedal repeatedly (approx. 10 times) to bleed the air. NOTICE If the attachment maker specifies an air bleeding procedure for the attachment itself, follow the specified procedure to bleed the air.
3) After completing the bleeding of the air, stop the engine, and wait for at least 5 minutes before starting oper- ations. This will release the bubbles in the oil inside the tank. 4) Check that there is no oil leakage, and wipe off any oil that has been spilled. 6-16