Single-Disk Fertilizer Opener Maintenance

A53694-UN-30JAN04

A - Bearing and Blade Assembly

B - Nut and Bushing

C - Set Screw, 2 used

D - Wheel

E - Shear Bolt

F - Shear Bolt Surface

G - Adjusting Arm

H - Washer

I - Pin

J - Bushing

1. If there is any play in the disk bearing, remove pin (I), washer (H), shear bolt (E), wheel (D) and axle.

2. Loosen set screws (C) and remove nut (B).

3. Remove bearing and blade assembly (A). Clean and repack bearings with John Deere TY6341 multipurpose SD polyurea or equivalent SAE multipurpose grease.

4. NOTE: During assembly, tighten nut (B) until 2 N·m to 5 N·m (17 lb-in. to 44 lb-in.) of torque is required to rotate the bearing and blade assembly (A). This drag assures positive sealing. Tighten set screws (C) when adjustment is complete. Bearings are packed with grease at the factory. After the first 10 hours inspect the bearing and adjust, if necessary.

   Install opener and tighten nut (B), while spinning disk, until the proper bearing preload is achieved.

5. Tighten set screws (C) to specification.

   Item	Measurement	Specification
   Bearing and Blade Reassembly
   Hub Rotation Preload	Torque	2 N·m to 5 N·m (17 lb-in. to 44 lb-in.)
   Set Screws (C)	Torque	9.6 N·m (85 lb-in.)

6. Lubricate surface of gauge wheel axle to prevent rusting and to keep depth adjustment working properly.

7. Re-install axle, wheel, shear bolt, washer and pin.

Every 100 hours, inspect the bearing and adjust, if necessary. Every 200 hours, or before each planting season, whichever comes first, disassemble the bearing, clean and repack it as outlined above. Do not use chassis lubricant in anti-friction bearings.