Remove and Install Left-Hand Upper Drive Roll Bearing

To prevent bearing failure, always loosen the three RIGHT-HAND SIDE flange mounting bolts (A and B) and cap screw (C) before tightening the left-hand side (drive side) center bolt (D). Adjust and tighten the right-hand side mounting bolts per this instruction AFTER left-hand side is tightened.

  1. E84128
    E84128-UN-16AUG17

    Right-Hand Upper Drive Roll Bearing

    E84131
    E84131-UN-17AUG17

    Left-Hand Upper Drive Roll Bearing

    A - Cap Screw, M8 (2 used)

    B - Cap Screw, M10

    C - Cap Screw, M12 x 80

    D - Cap Screw, M12

    Loosen flange mounting cap screws (A and B) and cap screw (C) on the right-hand side of the baler.


  2. Remove cap screw (D) on the left-hand side of the baler.

  3. Remove the drive chain.

  4. Carefully remove the sprocket and washers, noting the position and number of washers removed at each location.

  5. Remove the nuts retaining the drive roll bearing to the baler.

  6. Remove and discard the bearing.

  7. E67561
    E67561-UN-27AUG12

    A - Chamfered Spacer

    B - Washer (5 used, as required)

    C - Flanged Nut (4 used)

    D - Washer (4 used, as required)

    E - Washer, 45.2 x 57.2 x 0.9 mm (2 used)

    Install the new bearing as follows:

    1. Install chamfered spacer (A) with the chamfer toward the roll.

    2. Install washers (B), washer (E), and the bearing on the shaft.

    3. Install nuts (C) and tighten until snug.

    4. Pull the roll firmly to the left-hand side of the baler.


  8. Washer (E) must be next to the bearing.

    Center the roll side-to-side:

    • Measure from the outer rubber strip to the side sheet on both sides to check roll centering.
    • The difference between the two dimensions must be 6 mm (0.24 in) or less.
    • If needed, add or remove washers (B) between the roll and the left-hand bearing to center the roll.

  9. Tighten flange nuts (C) to specifications.
    Flange Nut and BoltTorque95 N·m (70 lb·ft)

  10. Install four washers (D), washer (E), and sprocket. Be sure the washer (E) is next to the bearing.

  11. E58846
    E58846-UN-29JUL10

    A - Sprocket

    B - Clearance, 91 mm (3.58 in)

    Measure clearance (B) between the side sheet and the outer surface of sprocket (A). Clearance must be within specification.
    Sprocket ClearanceClearance91 mm (3.58 in)


  12. If clearance is not within specification, add or remove washers between the sprocket and the bearing as necessary.

  13. E67562
    E67562-UN-27AUG12

    A - Thin Washer, 1.5 mm (as required)

    B - Washer, 6 mm (0.25 in)

    C - Washer, 13 x 57 x 6 mm

    D - Cap Screw, M12 x 75

    E - Sprocket

    F - Spacer

    G - Washer, 45.2 x 57.2 x 0.9 mm (2 used)

    To remove all the end play at the left-hand side of the baler, tap the right-hand side of the upper roll.


  14. Hold the upper roll shaft to the left-hand side and push the sprocket (E) and washers inward.

  15. To keep the center bolt from loosening and prevent hex knock, keep washers (A and B) centered on shaft. Ensure that washers do not rotate by hand. Joint must be clamped to eliminate hex knock.

    Install washers (A) and spacer (F) on shaft.

  16. Install washers (A) between the spacer and the end of the shaft, so that washers are flush with the end of the shaft, then add one washer (A).

  17. Install 6 mm (0.25 in) washer (B). Install washer (C).

  18. Install and tighten cap screw (D) to specification.
    Cap ScrewTorque140 N·m (103 lb·ft)

  19. E84127
    E84127-UN-16AUG17

    Right-Hand Bearing

    E84103
    E84103-UN-17AUG17

    A - Cap Screw, M8 (2 used)

    B - Cap Screw, M10

    C - Bearing

    D - Washer, 45.2 x 57.2 x 0.9 mm

    E - Thin Washer (4 used, as required)

    F - Bearing Housing

    G - Mounting Bracket

    H - Distance

    Check the position of the bearing assembly on the right-hand end of the drive roll.

    1. Remove and retain cap screws (A and B).

    2. Hold the bearing (C) tight against the washers.

    3. Check the distance (H) between the outer edge of the step in the cast bearing housing (F) and the edge of the mounting bracket (G) in all three locations. Verify that the dimension is within specification.
      Distance (H)Distance1.5—4.5 mm (0.059—0.177 in)


  20. If the distance (H) is not within specification:

    1. Disassemble and remove the bearing assembly. Make note of the location of all washers.

    2. Add or remove washers (E) behind the bearing, as necessary, to obtain the correct distance in all three locations.

    3. Reinstall the bearing in the reverse order of removal. Make sure that washer (D) is installed next to the bearing.

    4. Recheck the mounting distance.

  21. E84127
    E84127-UN-16AUG17

    A - Cap Screw, M8 (2 used)

    B - Cap Screw, M10

    Install previously removed cap screws (A and B). Tighten the cap screws only enough to get a light load between the bearing housing flanges and the mounting bracket. If necessary, lightly tap on the bearing housing to rotate the housing slightly and align the flanges at all three mounting locations. Do not fully tighten cap screws at this time.


  22. E84129
    E84129-UN-16AUG17

    A - Cap Screw, M8 (2 used)

    B - Cap Screw, M10

    C - Shim (as needed)

    Check to see if roll is centered in the hole in the side sheet.


  23. If the roll is not centered:

    1. Loosen cap screws (A and B).

    2. Insert shims (C) between the bearing mounting bracket and the cast bearing flanges as necessary.

    3. Snug up the cap screws but do not fully tighten at this time.

  24. Rolls must rotate freely. Check roll clearance through the hole in the side sheet.

    If the roll is equipped with wiper pins, it is permissible to grind the wiper pins to 3 mm (0.12 in) minimum height.

    To verify that the clearance with the side sheet hole is according to specifications, spin the upper drive roll. Add or remove shims (C) or move the right-hand bearing plate, or grind the wiper pins (if equipped).
    Roller ClearanceRadial Clearance1 mm (0.04 in)

  25. E84132
    E84132-UN-17AUG17

    A - Washer, 45.2 x 57.2 x 0.9 mm

    B - Washers (as needed)

    C - Thick Washer, Large ID

    D - Washer, 13 x 70 x 12 mm

    E - Cap Screw, M12 x 80

    To keep the center cap screw from loosening or avoid hex knock, keep washers (B and) centered on the shaft.

    Washer (A) must be next to the bearing.

    Steps 25—28 are required when hardware has been removed to adjust bearing mounting position.

    Install washer (A) and washers (B between the bearing and the end of the hex shaft. Add washers (B) until flush with the end of the shaft, then add one more washer.


  26. Install the large ID thick washer (C).

  27. Install end washer (D) and cap screw (E).

  28. To prevent bearing failure, always tighten cap screw (C) before tightening flange mounting cap screws (A and B).

    Ensure that the washers do not rotate by hand. Joint must be clamped to eliminate hex knock.

    E84128
    E84128-UN-16AUG17

    A - Cap Screw, M8 (2 used)

    B - Cap Screw, M10

    C - Cap Screw, M12 x 80

    Tighten cap screw (C) to specification.
    M12 Cap ScrewTorque140 N·m (103 lb·ft)


  29. Tighten middle flange mounting cap screw (B) first, then tighten cap screws (A). Tighten all cap screws to specification.
    Cap Screw (B)Torque80 N·m (59 lb·ft)
    Cap Screw (A)Torque40 N·m (30 lb·ft)

  30. Check the distance between the outer edge of the cast step on the bearing housing and the edge of the mounting bracket in all three locations as previously described. If the distance is not within specification at all locations, repeat the previous steps to adjust and recheck.

  31. Reinstall and adjust the drive chain.

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