178 Service and maintenanceService operationsby year1)km (x 1000)1)miles (x 1000)1)1302026040390604120805150100Replace air cleaner insert Every 4 years / 60,000 km / 40,000 mls+ Replace spark plugs Every 4 years / 60,000 km / 40,000 mlsVisually inspect ribbed V-belt X XReplace ribbed V-belt,Z 13 DTJ, Z 13 DTH, Z 13 DTR, Z 13 DTI, Z 17 DTREvery 10 years / 150,000 km / 100,000 mls+ Check valve clearance, adjustZ 16 LEL, Z 16 LER, Z 17 DTREvery 10 years / 150,000 km / 100,000 mls+ Replace toothed belt and tension roller,Z 16 LEL, Z 16 LER, Z 17 DTREvery 10 years / 150,000 km / 100,000 mlsChange engine oil and engine oil filter X X X X X+o Drain water from fuel filter, diesel (with high humidity and / or lower gradefuel)X X X X XReplace and drain fuel filter, diesel (grade EN 590) X XReplace fuel filter, external, petrol (grade EN 228) Every 4 years / 60,000 km / 40,000 mlsCheck and adjust parking brake (no weight on wheels); visually inspectwheel mounting and suspension springs front and rear, brake lines, brakepressure hoses, fuel lines and exhaust systemX X