Hitachi EX270-5 Excavator Service Repair Manual

Page 1

INTRODUCTION SAFETY ALERT SYMBOL AND HEADLINE NOTATIONS In this manual, the following safety alert symbol and signal words are used to alert the reader to the potential for personal injury of machine damage.

CAUTION: Indicated potentially hazardous situation which could, if not avoided, result in personal injury or death.

This is the safety alert symbol. When you see this symbol, be alert to the potential for personal injury. Never fail to follow the safety instructions prescribed along with the safety alert symbol. The safety alert symbol is also used to draw attention to component/part weights. To avoid injury and damage, be sure to use appropriate lifting techniques and equipment when lifting heavy parts.

IMPORTANT: Indicates a situation which, if not conformed to the instructions, could result in damage to the machine. NOTE: Indicates supplementary technical information or know-how.

UNITS USED 2

SI Units (International System of Units) are used in this manual. MKS system units and English units are also indicated in parenthheses just behind SI units.

Quantity Length Volume

Weight Force Torque

To Convert From mm mm L L 3 m kg N N Nm Nm

Into in ft US gal US qt 3 yd lb kgf lbf kgf m lbf ft

Example : 24.5 MPa (250 kgf/cm , 3560 psi) A table for conversion from SI units to other system units is shown below for reference purposees.

Multiply By 0.03937 0.003281 0.2642 1.057 1.308 2.205 0.10197 0.2248 1.0197 0.7375

Quantity Pressure Power Temperature Velocity Flow rate

IN-02

To Convert From MPa MPa kW kW C km/h -1 min L/min mL/rev

Into

Multiply By 2

kgf/cm psi PS HP F mph rpm US gpm cc/rev

10.197 145.0 1.360 1.341 C 1.8+32 0.6214 1.0 0.2642 1.0


                 







        

                                                                    

  

  

              



  






            

        

                  



  

                

        

                                     

   

                              




          

          



                 

        



         

        





        

       








                                            





   

                                        






          

                                                              





                                          






       

                                  

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

                                                         






             

                     

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             

                  

 

              

                       

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 

 

      

 

               

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                    

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

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   





         

                                                         

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 

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                   

                                                                                                                            

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