Check and Adjust Net Wrap Feed Roll Brake

TS268
TS268-UN-23AUG88

Prevent possible injury or death. Ensure that bystanders stand clear before operating the surface wrap unit.

  1. E83522
    E83522-UN-16JUN17

    A - Lever

    B - Brake Band

    C - Cap Screw

    D - Sheave

    E - V-Belt

    Open the net wrap cover.


  2. Move brake lever (A) out and up to rest on the latch tab and release the brake band (B).

  3. To aid in assembly, record the location and number of shims on both sides of the sheave.

    Remove the cap screw (C), washer, shims, sheave (D), and V-belt (E).

  4. Connect the monitor-controller power plug to the convenience outlet on the tractor.

  5. Turn the tractor ignition key to the ON position. Do not start the tractor engine.

  6. Press and hold the COUNTER key while turning the monitor-controller ON. Verify that CH001 appears on the display.

  7. Continue to hold the COUNTER key and press the PLUS key until CH018 appears in the display. Release the COUNTER key.

  8. Press and hold the EXTEND key until the net wrap actuator extends the counterknife angle to the highest position.

  9. E65146
    E65146-UN-18MAY12

    Cut-off Arm (Right-Hand Side)

    A - Cut-off Arm

    B - Tab

    Check the position of the right-hand net wrap cut-off arm (A). The arm must contact the tab (B) FIRMLY. If the arm is positioned correctly, proceed to the next step. If the position is not correct, adjust the base end of the mounting bracket as follows to obtain a firm contact:

    1. Avoid personal injury from an unexpected knife movement. Disconnect the net wrap actuator connector or power plug when adjusting or working in the area.

      Turn the tractor ignition key to the OFF position.


    2. E82308
      E82308-UN-02MAR17

      A - Cap Screw (2 used)

      B - Carriage Bolt (2 used)

      Loosen the cap screws (A) on top of the bracket and the carriage bolts (B) on the bottom end of the bracket.

    3. Turn the tractor ignition key to the ON position.

    4. Press the RETRACT key and retract the counterknife angle to the shortest position. Tighten the bracket mounting bolts.

    5. Extend the actuator and recheck for a firm contact.

    6. Retract the actuator fully.

    7. Turn the tractor ignition key to OFF and remove the key.


  10. Install sheave shims as removed. Move shims from inner to outer side of sheave as necessary for proper sheave alignment.

    E83523
    E83523-UN-16JUN17

    A - V-Belt

    B - Sheave

    C - Shim

    D - Washer

    E - Cap Screw

    Install the V-belt (A), sheave (B), shims (C), washer (D), and cap screw (E). Tighten the cap screw to specification.
    Feed Roll Sheave Cap ScrewTorque40 N·m (30 lb·ft)


  11. E82258
    E82258-UN-15FEB17

    Brake Shown Disengaged

    A - Brake Lever

    Disengage the net wrap brake lever (A) by placing the lever on top of the lock tab.


  12. Remove the net wrap from between the rolls.

  13. The knife arm must be fully down.

  14. Verify that the rubber and steel rolls are clean.

  15. Check that the brake band and V-belt sheave are clean and dry.

  16. Ensure that the rubber and steel rolls turn freely with the brake lever disengaged.

  17. Engage the feed roll brake to the sheave by lowering the brake lever to the bottom of the lock tab.

  18. E82303
    E82303-UN-02MAR17

    E84164
    E84164-UN-06NOV17

    E84165
    E84165-UN-24AUG17

    A - Timing Bolt

    B - Tension Tube

    C - Lock Nut

    D - Timing Bolt Gap

    The timing bolt (A) adjusts the spring tension to control brake performance. To ensure that the net feed roll brake is applied at the proper time at the end of the wrap application cycle, the timing bolt must be properly adjusted. Incorrect adjustment can result in net material feeding problems.

    To check for proper brake adjustment, measure the timing bolt gap (D) between the bottom of the timing bolt head and the top surface of the spring plug. Gap must be within specification.
    Timing Bolt Gap (D)Distance1.5—6 mm (0.059—0.236 in)


  19. Do not adjust the timing bolt before loosening the lock nut, or damage to the brake can result.

    The functional range of the timing bolt gap is 1.5—6 mm (0.059—0.236 in).

    If the timing bolt gap is not within specification, adjust as follows:

    1. Loosen lock nut (C) while holding the tension tube (B) using the wrench flats.

    2. Turn the timing bolt (A) until the gap (D) is within specification.

    3. Tighten the lock nut (C) against the tension tube (B) while holding the tension tube using the wrench flats.

  20. E82721
    E82721-UN-02MAY17

    Photo 1—Timing is Correct (Net Wrap Material is Snug Against Steel Roll)

    E82722
    E82722-UN-02MAY17

    Photo 2—Timing is Late (Net Wrap Material is Looped Above Counterknife)

    E83751
    E83751-UN-05JUL17

    Photo 3—Timing is Early (Broken Net Material Has Snapped Back)

    A - Net Wrap Material

    B - Counterknife

    Verify that the net wrap material is feeding properly:

    • When the brake timing is correct, the net material (A) is snug against the steel roll as shown in Photo 1.
    • If the brake timing is too late, a loop of net can develop above the counterknife (B). The material can get pinched between the front sheet and the rubber roll and cause feeding issues as shown in Photo 2. Adjust the timing bolt to specification.
    • If the brake timing is too soon, net snap back can occur and can result in feeding issues as shown in Photo 3. Adjust the timing bolt to specification.


  21. After adjustments are made, return the net knife arms to the home position by selecting the WRAP key. Turn the ignition key OFF to cancel the STOP alarm. If this procedure is not followed, net feeds continuously while the next bale is formed.

    Turn the tractor ignition key to the ON position.

  22. Cycle the net wrap actuator by selecting the WRAP key. The counterknife must be at the home (downward) position.

  23. Turn the tractor ignition key to the OFF position. Remove the key.

SF04007,0001226-19-20181109