Komatsu — 5. CONTENTS

5. CONTENTS MAINTENANCE 17. Guides to maintenance ...................................................................................................................... 3-2 18. Outlines of service ............................................................................................................................. 3-5 18.1 Outline of oil, fuel, coolant........................................................................................................ 3-5 18.2 Outline of electric system .........................................................................................................

3-9 18.3 Outline of hydraulic system .................................................................................................... 3-10 19. Wear parts list .................................................................................................................................. 3-11 20. Use of fuel, coolant and lubricants according to ambient temperature ............................................ 3-12 21. Standard tightening torques for bolts and nuts ................................................................................ 3-16 21.1 Introduction of necessary tools ...............................................................................................

3-16 21.2 Torque list ................................................................................................................................ 3-17 22. Periodic replacement of safety critical parts .................................................................................... 3-18 23. Maintenance schedule chart ............................................................................................................ 3-20 23.1 Maintenance schedule chart ................................................................................................... 3-20 23.2 Maintenance interval when using hydraulic breaker ...............................................................

3-22 24. Service procedure ............................................................................................................................ 3-23 24.1 Initial 250 hours service ........................................................................................................ 3-23 24.2 When required ...................................................................................................................... 3-24 24.3 Check before starting............................................................................................................

3-47 24.4 Every 50 hours service ......................................................................................................... 3-51 24.5 Every 100 hours service ....................................................................................................... 3-53 24.6 Every 250 hours service ....................................................................................................... 3-56 24.7 Every 500 hours service ....................................................................................................... 3-62 24.8 Every 1000 hours service .....................................................................................................

3-70 24.9 Every 2000 hours service ..................................................................................................... 3-73 24.10 Every 4000 hours .................................................................................................................. 3-76 24.11 Every 5000 hours .................................................................................................................. 3-77 SPECIFICATIONS 25. SPECIFICATIONS .............................................................................................................................

4-2 25.1 Machine specifications .............................................................................................................. 4-2 25.2 Explanation of lifting capacity chart .......................................................................................... 4-5 PC450-ENG 0-9