MAINTENANCE G. COOLING SYSTEM (See Page 7-65) NOTE: Maintenance required only during first time check. 1 Change every two years or 4000 operating hours, whichever comes first. 2 Shorten the maintenance interval when the machine is operated in dusty areas. IMPORTANT: Use fresh water or normal tap water as a coolant. Do not use strong acid or alkaline water. Use the coolant with genuine Hitachi Long-Life Coolant (LLC) mixed by 30 to 50 %. H. ELECTRICAL SYSTEM (See Page 7-71) I. MISCELLANEOUS (See Page 7-77) NOTE: Maintenance required only during first time check. Contract your authorized dealer for maintenance. 7-11 Parts Quantity Interval (hours) 8 50 100 250 500 1000 2000 1.
Check Coolant Level 1 2. Check and Adjust Fan Belt Tension 1 ★★ 3. Change Coolant 32 L (8.5 US gal) Twice a year ✸ 1 4. Clean Inter Cooler, Oil Cooler and Radiator Core Outside 1 ✸ 2 Inside 1 Once a year 5. Clean Oil Cooler Front Screen 1 ✸ 2 6. Clean Air Conditioner Condenser 1 ✸ 2 7. Clean Inter Cooler Front Screen 1 ✸ 2 8. Clean Air Conditioner Front Screen (Opt.) 1 ✸ 2 Parts Quantity Interval (hours) 8 50 100 250 500 1000 2000 1. Battery Level Check 2 Every month Specific Gravity 2 Every month 2. Replace Fuse — As required Parts Quantity Interval (hours) 8 50 100 250 500 1000 2000 4000 1. Check Bucket Teeth for Wear and Looseness — 2. Change Bucket — As required 3.
Adjust Bucket Linkage 1 As required 4. Remove Travel Levers 2 As required 5. Check and Replace Seat Belt 1 Every 3 years (Replace) 6. Check Windshield Washer Fluid Level 1 As required 7. Check Track Sag 2 8. Check Air Conditioner Filter Circulating Air Filter Cleaning 1 Replacement 1 After cleaning 6 times or one year Fresh Air Filter Cleaning 1 Replacement 1 After cleaning 6 times or one year 9. Check Air Conditioner — 10. Clean Cab Floor — As required 11. Retighten Cylinder Head Bolt — ✹As required 12. Inspect and Adjust Valve Clearance — ✹ 13. Check Fuel Injection Timing — ✹As required 14. Measure Engine Compression Pressure — ✹ 15. Check Starter and Alternator — ✹ 16.
Check Water Pump — ✹ 17. Check Tightening Torque of Bolts and Nuts — ★★★