Komatsu D31EX-21, Operation & Maintenance Manual, Page: 16 / 256

CONTENTS
1-14
MAINTENANCE
GUIDE TO MAINTENANCE ................................................................................................................................. 4-2
OUTLINE OF SERVICE ........................................................................................................................................ 4-5
OUTLINE OF OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC................................................... 4-5
OIL ..................................................................................................................................................... 4-5
FUEL.................................................................................................................................................. 4-5
COOLANT ......................................................................................................................................... 4-6
GREASE............................................................................................................................................ 4-6
CARRYING OUT KOWA (Komatsu Oil Wear Analysis) .................................................................... 4-6
STORING OIL AND FUEL................................................................................................................. 4-7
FILTERS ............................................................................................................................................ 4-7
RELATING TO ELECTRIC SYSTEM ......................................................................................................... 4-8
WEAR PARTS LIST ............................................................................................................................................. 4-9
WEAR PARTS LIST.................................................................................................................................... 4-9
USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE ..................... 4-11
PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS ......................................................... 4-11
STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS ..................................................................... 4-15
TORQUE LIST .......................................................................................................................................... 4-15
PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS .......................................................................... 4-16
SAFETY CRITICAL PARTS...................................................................................................................... 4-16
MAINTENANCE SCHEDULE CHART ............................................................................................................... 4-17
MAINTENANCE SCHEDULE CHART ...................................................................................................... 4-17
WHEN REQUIRED.......................................................................................................................... 4-17
CHECK BEFORE STARTING ......................................................................................................... 4-17
EVERY 50 HOURS SERVICE......................................................................................................... 4-17
EVERY 250 HOURS SERVICE....................................................................................................... 4-17
EVERY 500 HOURS SERVICE....................................................................................................... 4-17
EVERY 1000 HOURS SERVICE..................................................................................................... 4-17
EVERY 2000 HOURS SERVICE..................................................................................................... 4-18
EVERY 4000 HOURS SERVICE..................................................................................................... 4-18
SERVICE PROCEDURE .................................................................................................................................... 4-19
WHEN REQUIRED ................................................................................................................................... 4-19
CHECK, CLEAN AND REPLACE AIR CLEANER ELEMENT ......................................................... 4-19
CLEAN INSIDE OF COOLING SYSTEM ........................................................................................ 4-23
CHECK TRACK SHOE TENSION, ADJUST ................................................................................... 4-25
CHECK AND TIGHTEN TRACK SHOE BOLTS.............................................................................. 4-27
CHECK ELECTRICAL INTAKE AIR HEATER ................................................................................ 4-27
REVERSE AND REPLACE END BITS AND CUTTING EDGES..................................................... 4-28
CHECK IDLER OIL LEVEL, ADD OIL ............................................................................................. 4-29
ADJUST IDLER CLEARANCE ........................................................................................................ 4-29
ADJUST PLAY IN CENTER BALL .................................................................................................. 4-30
GREASE DOOR HINGE.................................................................................................................. 4-30