Isuzu — The fallowing is a brief explanation of the services listed in the preceding Engine Maintenance schedule.

A Isuzu service procedure — check it applies to your exact model before use.

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Procedure

1. 1. Oil level and oil fouli ng Check that the oil level is between the max. level mark and the min. level mark. Oil leakage check Oil pressure gauge registration Oil pressure warning lamp Engine oil replacement Oil filter element replacement Fuel lea kage check Draining water in fuel filter Fuel filter element replacement
2. 10. Injection nozzle check Drain oi] to the max. level mark if oil level is above the max. level mark. Add oil to the max. level mark if oil is below the min. level mark. Replace any damaged or malfunctioning parts which could cause leakage. Engine oil pressure is normal at about 3 to 5 kg/cm? in warmed-up condition. Check and repair the lubrication oil system, if it is abnormal. Warning lamp is off while engine running. If it stays on, check and repair the lubrication system. Change oil every 250 hours. Change element every 500 hours. Inspect the fuel lines for damage which could cause leakage. Replace any damaged or malfunctioning parts. Drain water in fuel filter if water reaches the fuel element. Change element every 500 hours. Check and adjust injection opening pressure and spray condition. (This is a recommended maintenance) a oe
3. 11.
4. 12.
5. 13.
6. 14.
7. 15.
8. 16.
9. 1?.
10. 18.
11. 13.
12. 20.
13. 21.
14. 22. Coolant level and fouling check Coolant leakage check Radiator filler cap fitting condition Fan belt tension check Coolant temperature registration Coolant replacement Radiator external face cleaning Cooling system circuit cleaning Radiator filling cap function check Electrolyte level check Battery cleaning Battery charge condition Check coolant level and add coolant if necessary. Repair part for coolant leakage. The radiator cap must be installed tightly. Check and adjust fan belt deflection. Look for cracks, fraying and wear. Coolant temperature is normal at about 75 to 85°C (167 to 185°F). Check and repair the cooling system if coolant temperature is abnormal. Change coolant at intervals of 6 months or 12 months respectively if coolant is plain water, or long life coolant (LLC). According to the equipment manufacturer's specification. Clean the cooling system circuit every 1000 hours. Check radiator pressure cap perodically for proper operation according to the equipment manufacturer's specifications. Replenish with distilled water if necessary. Clean the terminals. Ammeter registration goes to plus (+) side while engine running. In the lamp type, the lamp is completely being off while engine running. Check charging circuit if the lamp is not off. a SSS SS . Electrolyte gravity Check according to the equipment manufacturer's specifications. check . Starter and generator Check wear condition of brush and commutator. check and cleaning . Wiring and connection Check according to the equipment specifications. check . Preheating condition Check preheating condition of the system. check . Air cleaner element Change element according to the manufacturer's specifications. replacement . Engine starting Check engine stability and noise. condition and noise condition . Exhaust smoke Check exhaust smoke color. condition . Cylinder compression Check every 1000 hours. pressure . Valve clearance check Incorrect valve clearance will result in increased engine noise and lower engine output. Thereby adversely affecting engine performance. Check and adjust every 1000 hours.
15. 9. SIMPLE ENGINE TROUBLESHOOTING This item contents a simple troubleshooting. When a failure takes place on your ISUZU engine, diagnose the cause referring this troubleshooting. Should the cause of failure cannot be detected or you are unable to manage the failure consult to your machine supply source or nearest ISUZU engine service outlet. Battery discharged. imperfect cable connections. Starter does not turn. ; . Starter or starter switch failure. Safety relay failure. Engine stop solenoid return failure. No fuel in the fuel tank. No fuel injaction. Clogged fuel fitter element. Air in the fuel system. Control rack is stuck at no fuel position. Unpraper preheating operation, Glow plug malfunction. Fuel is injected but Incorrect injection timing. engine does nat ignite. Low cylinder compression pressure. Engine stop solenoid incomplete return. . Starter turns but engine Engine does not start. does not ignite. Engine ignite but Air in the fuel system. stall immediately. | Improper Jow idling speed adjustment.

Source: manual:ISUZU Instruction Manual 3LA1 3LB1 3LD1 2000.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.