12. OPERATION 12.9 WORKING MODE SELECTION WORKING MODE The mode selector switches can be used to switch the mode to match the conditions and purpose of work, thereby enabling efficient operation. Use the following procedures to make the most effective use of each mode. When the starting switch is turned ON, the working mode is set to general operation mode (G.O.), so normal work can be carried out with- out needing to set the mode. Set the most effective mode according to the type of work using working mode selector switch. NOTICE Never carry out breaker operation in heavy-duty operation mode (H.O.) as this may result in breakage of hydraulic equipment.
PC450-ENG 2-65 Working mode Applicable work Power max. (power up) Swift slow-down (speed down) Power Speed Heavy-duty operation mode (H.O.) Large amount of digging and loading in a short time 5% up 30% down General operation mode (G.O.) Normal digging and loading operation 10% up 20% down Finishing operation mode (F.O.) Finishing, levelling and general hauling operation - - Lifting operation mode (L.O.) Positioning, etc. - - Breaker operation mode (B.O.) Breaker operation - -