Lubrication and Maintenance OURGP11,000021E –19–15OCT03–2/2 21-5 021604 PN=132 Lubrication and Maintenance Service Intervals Item Every 2 Weeks 500 Hours or 12 Months 2000 Hours or 24 Months As Required Test Glow Plugs (4045HF475, 6068HF475) • Add Coolant • Replace Air Cleaner Elements • Replace Fan and Alternator Belts • Check Fuses • Check Air Compressor (If Equipped) • Bleed Fuel System •