78 HT25 - MAINTENANCE ENGINE om0462h.eps Fill as needed with only Ditch Witch approved coolant (p/n 255- 006), or other fully formulated ethylene-glycol-based heavy duty engine coolant meeting ASTM specification D6210, TMC RP329, or John Deere specification JDM H24A2. Do not fill over FULL mark on tank. Check clamps and hoses for looseness or wear. Tighten loose clamps. Replace swollen, hardened, or cracked hoses. Check coolant level in overflow tank every 10 hours. Coolant should be between LOW and FULL marks on tank. Change coolant every 2000 hours. Open two drains (3, 4) and radiator cap and drain coolant. Close drains and fill (1, 2) with a 50-50 mix of anti-freeze and water.
p Allow engine to cool. Drain overflow tank. Cooling System Check Change