Every 400 Hours

1. NOTE:

   
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   S660 and S670 / S680 and S690

   
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   Batteries are located on right-hand side of machine for S660 and S670 machines and on left-hand side of machine for S680 and S690 machines.

   Batteries - Clean top of batteries and check level in each cell. Fill to bottom of filler neck with distilled water if needed. Clean battery posts, cables, and tighten connections as needed.

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2. Fire Extinguishers - Inspect fire extinguishers (front and rear) by following maintenance instructions on fire extinguisher label. Recharge or replace as necessary.

3. Air Filter Element - When engine air filter restricted indicator is shown on display, service primary filter. Check precleaner for plugging. Check for leaks and for collapse of aspirator tube. Replace elements if plugged.

4. CAUTION: Dirt, oil, chaff, and crop debris in this area is a fire hazard. Direction of wind, type of crop and its moisture content can all have an effect on where and how much chaff and debris accumulate. Do not clean area with engine running.

   S670, S680 and S690 Machines: Multi-Speed Feeder House Drive (Optional) - Remove access door on front side of grain tank and clean material around gearcase.

5. IMPORTANT: Inspect seat belt and mounting hardware at least once a year. If seat belt system, including mounting hardware, buckle, belt, or retractor, shows any sign of damage or unusual wear, discoloration, or abrasion the entire seat belt should be replaced immediately. For your safety, replace seat belt system with replacement parts approved for your machine. See your John Deere dealer.

   Seat Belt - Inspect seat belt for damage.