Isuzu 4BG1 Instruction Manual page 93

9. Fuel leakage check Inspect the fuel lines for damage which could cause leakage. Replace any
damaged or malfunctioning parts.
IO. Draining water in fuel The fuel system without the water sedimentor.
filter Drain the sedimented water in fuel filter every 200 operation hours.
11. Fuel filter element
replacement
Change element every 600 hours.
12. Feed pump strainer
cleaning
Clean the feed pump strainer every 1200 hours.
13. Injection nozzle check Check and adjust injection opening pressure and spray condition. (This is a
recommended maintenance)
14. Coolant level and
fouling check
Check coolant level and add coolant if necessary.
15. Coolant leakage check Repair part for coolant leakage.
16. Radiator filler cap
fitting condition
The radiator cap must be installed tightly.
17. Fan belt tension check Check and adjust fan belt deflection. Look for cracks, fraying and wear.
18. Coolant temperature Coolant temperature is normal at about 75 to 85OC (167 to 185°F). Check and
registration repair the cooling system if coolant temperature is abnormal.
19. Coolant replacement Change coolant at intervals of 6 months or 12 months respectively if coolant is
plain water, or long life coolant (LLC).
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