Operation & Maintenance Manual for WP7 Euro Ⅵ Vehicle Diesel Engine 2 Regular inspection and maintenance of diesel engine Table 2-1 Working conditions of matched vehicles Table 2-2 Intervals for 1st inspection, regular inspection and maintenance 7 (WG I) (WG II) (WG III) Working under severe conditions (extremely cold or hot; dusty; short distance transport; working on construction site and city buses, municipal construction vehicles, snow sweeper vehicles or fire trucks) or annual mileage is less than 20,000 km or annual working hours is less than 600h Annual mileage is less than 60,000 km; short or medium distance transport (goods transport) Annual mileage is longer than 60,000 km; long distance transport Working condition Item (WG I) (WG II) (WG III) 1st inspection Having traveled 1,000-1,500km or having worked for 30-50h Having traveled 1,500-2,000 km Having traveled 1,500-2,000 km Regular inspection Every 5,000km or every 150h Every 10,000 km Every 15,000 km Grade 1 maintenance Every 10,000 km or every 300h Every 20,000 km Every 30,000 km Grade 2 maintenance Every 20,000 km or every 600h Every 40,000 km Every 60,000 km Grade 3 maintenance Every 40,000 km or every 1,200h Every 80,000 km Every 120,000 km Grade 4 maintenance Every 80,000 km or every 2,400h Every 160,000 km Every 240,000 km