Pneumatic Down Force

1. CAUTION: Avoid serious injury from exploding parts due to over-pressurization or operating the system without all components in place.

   • Do not inflate system above 827 kPa (8.2 bar) 1779 N (400 lb. down force).
   • Do not remove pressure relief valve.
   • Do not pressurize system unless all row unit components are in place.
   
   

   IMPORTANT: Do not lower machine with zero air pressure in system. Maintain 34—55 kPa (0.3—0.5 bar) 76—120 N (17—27 lb. down force) in system or air springs kink. If air spring kinks, raise machine and pressurize the system until air springs straighten out.

   IMPORTANT: Do not operate if a pinched or unrolled air spring occurs. Lower system pressure until air springs is rolled by hand. Roll air spring back over lower piston. Incremental lowering of machine is required to start air spring rolling over lower piston.

   NOTE: It is normal for system air pressure to drop when frame is raised and increase when frame is lowered.

   NOTE: Some additional down force on row units that follow in tractor tire tracks is required. An extra single down force spring is installed on these row units, without affecting other row units. See your John Deere™ dealer for more information.

   
   A68216-UN-22JUL10

   Properly Rolled Air Spring

   
   A82457-UN-30APR14

   Single Rank Valve Block

   
   A68217-UN-22JUL10

   Improperly Rolled Air Spring

   
   A72712-UN-21SEP11

   Dual Rank Valve Block

   A - Valve Stem

   B - Handle (If Equipped)

   C - Manual Overrides

   D - Tank Gauge

   Ensure handle (B) (if equipped) is horizontal when operating planter.

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2. If compressor system fails, charge the air spring circuit at fill valve (A) with shop air.

3. If down force control system fails, use manual overrides (C) to increase or decrease air spring pressure. Check air spring pressure with a tire pressure gauge at fill valve (A).

4. Tank gauge (D) displays pressure in tank not pressure in air springs. Normal operating range for tank pressure is 790—1000 kPa (7.9—10 bar) (115—145 psi).

   For more information, see your SeedStar™ Monitor Operators Manual.

Clean or Replace Hydraulic Air Compressor Filter

CAUTION: Deactivate SCV operating hydraulic compressor and turn off tractor before servicing.

1. IMPORTANT: Filter cleanliness is critical to maintain the performance and service life of the air compressor. Clean air filter element every 50 hours. Replace the air filter element every 100 hours or at the beginning of each season.

   
   A72543-UN-14SEP11

   
   A82492-UN-05MAY14

   A - Wing Nut and Seal Washer

   B - Weather Shield

   C - Filter Element

   D - Filter Base

   Remove and retain wing nut and seal washer (A).

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2. Remove and retain weather shield (B).

3. Remove filter element (C).

4. IMPORTANT: Clean all excess material from filter base (D) before installing filter.

   Install cleaned or new filter.

5. Install previously remove weather shield, wing nut, and seal washer. Tighten wing nut.