Komatsu D31EX-21, Operation & Maintenance Manual, Page: 17 / 256

CONTENTS
1-15
CHECK DOOR LOCK STRIKER ..................................................................................................... 4-31
CHECK, ADJUST AIR CONDITIONER ........................................................................................... 4-31
CHECK WINDOW WASHER FLUID LEVEL, ADD FLUID .............................................................. 4-33
REPLACE WIPER BLADE .............................................................................................................. 4-33
PROCEDURE FOR BLEEDING AIR IN HYDRAULIC SYSTEM..................................................... 4-34
PROCEDURE FOR RELEASING INTERNAL PRESSURE OF HYDRAULIC SYSTEM ................ 4-35
CHECK BEFORE STARTING .................................................................................................................. 4-36
EVERY 50 HOURS SERVICE .................................................................................................................. 4-37
DRAIN WATER, SEDIMENT FROM FUEL TANK........................................................................... 4-37
EVERY 250 HOURS SERVICE ................................................................................................................ 4-38
LUBRICATING................................................................................................................................. 4-38
CHECK OIL LEVEL IN FINAL DRIVE CASE, ADD OIL .................................................................. 4-40
CHECK LEVEL OF BATTERY ELECTROLYTE ............................................................................. 4-41
CHECK BRAKE PERFORMANCE .................................................................................................. 4-43
CLEAN AIR CONDITIONER AIR FILTER (FRESH/RECIRC FILTER) ........................................... 4-44
EVERY 500 HOURS SERVICE ................................................................................................................ 4-45
REPLACE FUEL FILTER CARTRIDGE .......................................................................................... 4-45
CHANGE OIL IN ENGINE OIL PAN, REPLACE ENGINE OIL FILTER CARTRIDGE .................... 4-48
REPLACE CORROSION RESISTOR CARTRIDGE ....................................................................... 4-49
CLEAN, CHECK RADIATOR FINS AND OIL COOLER FINS......................................................... 4-50
EVERY 1000 HOURS SERVICE .............................................................................................................. 4-51
CHANGE OIL IN FINAL DRIVE CASE ............................................................................................ 4-51
CHECK FAN BELT TENSION, ADJUST ......................................................................................... 4-51
CHECK ALL TIGHTENING PARTS OF TURBOCHARGER ........................................................... 4-51
CHECK PLAY OF TURBOCHARGER ROTOR .............................................................................. 4-52
CHECK FOR LOOSE ROPS MOUNT BOLTS ................................................................................ 4-52
EVERY 2000 HOURS SERVICE .............................................................................................................. 4-53
CHANGE OIL IN HYDRAULIC TANK, REPLACE OIL FILTER CARTRIDGE AND CLEAN SUCTION
STRAINER....................................................................................................................................... 4-53
CLEAN, CHECK TURBOCHARGER............................................................................................... 4-55
CHECK VIBRATION DAMPER ....................................................................................................... 4-55
CHECK ALTERNATOR, STARTING MOTOR ................................................................................ 4-55
CHECK ENGINE VALVE CLEARANCE, ADJUST.......................................................................... 4-55
EVERY 4000 HOURS SERVICE .............................................................................................................. 4-56
CHECK WATER PUMP................................................................................................................... 4-56
SPECIFICATIONS
SPECIFICATIONS ................................................................................................................................................ 5-2