Every 2000 Hours or Six Years

1. 
   H93405-UN-05FEB09

   
   H91173-UN-17APR08

   A - Drain

   B - Surge Tank

   Radiator - Open drain (A) to remove coolant from radiator.

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2. NOTE: Air becomes trapped in Exhaust Gas Recirculation (EGR) cooler during the coolant fill operation. This trapped air will cause severe damage to cooler and turbo charger. Use proper filling and bleeding procedure shown in Service Engine section to avoid damage to components.

   Surge Tank - Flush and refill with correct coolant and conditioner (see Cooling System—Draining in Service Engine section and Engine Coolant recommendations given in Fuels and Lubricants section). Check engine coolant level in surge tank (B) with engine cold. Level must be up to “Max Cold” line.