Cooling System—Draining

1. CAUTION:

   
   TS281-UN-15APR13

   
   H95384-UN-16FEB10

   S660 and S670

   
   H102519-UN-27JUN11

   S680 and S690

   A - Drain Valve

   Avoid being scalded when opening surge tank cap. Open cap 1.5 turns to relieve pressure. Never open cap when engine is hot. Allow system to cool before draining.

   NOTE: Radiator drain is on front side of radiator.

   Cooling system must be drained and replaced every six years or 6000 hours.

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2. Open drain valve (A) on radiator.

3. 
   H104941-UN-28FEB12

   Front Side of Engine (S660 and S670)

   
   H104942-UN-28FEB12

   Above Crankshaft (S680 and S690)

   A - Drain Valve

   Open drain valve (A) on engine block.

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4. 
   BM004681-UN-29FEB16

   A - Surge Tank Cap

   Open surge tank cap (A) to allow coolant to drain faster.

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5. Close radiator drains and fill system with clean water.

6. Install surge tank cap and run engine until it reaches operating temperature with heater ON.

7. Shut OFF engine, carefully remove out surge tank cap and drain water before rust or sediment settles.

8. Close radiator drains and refill system with a solution of clean water and John Deere Cooling System Cleaner PT500 or equivalent. Follow instructions with cleaner.

9. After using cleaner, flush system with clean water and drain.

10. Close radiator drains and fill system (refer to Cooling System—Filling in this section for filling procedure and Fuels and Lubricants section for coolant specifications).