Replace Disk Openers and Bearings

Disk Openers

CAUTION: Disks are sharp. Use caution and wear protective clothing to avoid cutting hands.

METHOD ONE:

1. NOTE: Diameter of a new disk opener (G) is 457 mm (18 in). Replace disk openers when diameter is less than 406 mm (16 in) or if uneven seeding depth occurs.

   Clean dirt from parts before removal.

   Remove gauge wheel (not shown) from arm. See Repair Steel Gauge Wheel Assembly or Repair Smooth-Sided Gauge Wheel Assembly in this section for information.

2. 
   N59861-UN-16APR02

   A - Depth Adjustment Arm

   B - Triple Lip Seal

   C - Inner Spacer

   D - Nut

   E - Seal Assembly

   F - Lock Nut

   G - Disk Opener

   H - Hub Assembly

   I - Bolt

   J - Grease Fitting

   K - Lock Nut

   L - Lock Nut

   M - Cap Screw

   N - Depth Gauge Handle Arm

   O - Cover

   P - Handle

   Q - Compression Spring

   R - Lock Nut

   S - Cap Screw

   T - Spindle

   Place handle (P) in lowest possible slot.

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3. Remove lock nuts (F).

4. CAUTION: Disks are sharp. Use caution and wear protective clothing to avoid cutting hands.

   Remove disk opener (G) by maneuvering around depth adjustment arm (A).

5. Install new disk with beveled side towards hub.

6. IMPORTANT: Tire damage can occur if disk opener and gauge wheel are not correctly spaced.

   Install previously removed parts. See Check Gauge Wheel Clearance—All Gauge Wheels in this section when installing gauge wheel.

METHOD TWO:

1. NOTE: Clean dirt from parts before removal.

   Remove gauge wheel (not shown) from arm. See Repair Steel Gauge Wheel Assembly or Repair Smooth-Sided Gauge Wheel Assembly in this section for information.

2. Remove grease fitting (J).

3. IMPORTANT: Avoid damaging triple lip seal (B). Remove arm (A) carefully.

   Remove cap screw (M) and depth gauge handle arm (N); then remove depth adjustment arm (A).

4. CAUTION: Disks are sharp. Use caution and wear protective clothing to avoid cutting hands.

   IMPORTANT: Do not damage triple lip seal (B) on nut. Use care when removing and installing disk opener.

   Remove lock nuts (F) and disk opener (G).

5. Install new disk opener with beveled side towards hub.

6. IMPORTANT: Avoid damaging triple lip seal (B). Install arm (A) carefully.

   Grease triple lip seal (B) and install arm (A).

7. IMPORTANT: Tire damage can occur if disk opener and gauge wheel are not correctly spaced.

   Install previously removed parts. See Check Gauge Wheel Clearance—All Gauge Wheels in this section when installing gauge wheel.

Bearings

Bearing replacement requires a special tool and procedure. See your John Deere dealer.