Maintenance Schedule C8.3 Commercial Marine and Ind [...] Page 2-8 Section 2 - Maintenance Guidelines Table 2, Oil Drain Intervals Vehicle/Equipment Kilometers Miles Hours Months Tractor/combine/ irrigation equipment N/A N/A 250 3 Generator set/air compressor/fire pump N/A N/A 250 3 Table 3, Oil Drain Intervals Vehicle/Equipment Kilometers Miles Hours Months All others 10,000 6,000 250 3