Repairing Belts

E35384
E35384-UN-28AUG90

A belt lacing tool and hardware is available for repairing belts.

  1. Remove broken belt(s).

  2. E21797
    E21797-UN-24JUN99

    Using a square and sharp knife, remove damaged area. Check belt to be sure it is cut squarely


  3. If belt lengths are less than specifications, belts will contact each other and accelerate wear to the belt diamond pattern. Belt contact occurs between the rear two tension arm rollers when the baler is empty and the gate is closed.

    If belts are longer than specifications, belts may slip on drive rolls and bale density may be reduced.

    Make sure all belts are within 38 mm (1-1/2 in.) of the other belts of similar length. There should not be more than 152 mm (6 in.) difference between the long and short belts.

    If belts are shorter than the specified dimensions, a short piece of belt may be added. Splices (on same belt) should be at least 305 mm (12 in.) apart.

    Check belt length. Make sure belt is neither longer or shorter than specified.

    Belt Lengths
     

    Minimum

    Repair

    Maximum

    Short Belts

    11633 mm (458 in.)

    11709 mm (461 in.)

    11760 mm (463 in.)

    Long Belts

    11773 mm (463-1/2 in.)

    11849 mm (466-1/2 in.)

    11900 mm (468-1/2 in.)

  4. Cut only the diamond pattern. Cutting deeper can damage the belt cords.

    Do not use a grinder to remove diamond pattern. Heat from grinder can cause damage to rubber and fabric.

    E21799
    E21799-UN-24JUN99

    Remove diamond pattern from belt using a knife or skiving tool.

    • To reduce cutting effort, dip knife blade in liquid soap.
      If using a knife:
      • Use approximately 25—51 mm (1—2 in.) thick board to hold belt as shown.
      • Measure 25 mm (1 in.) from end of belt. Use a sharp knife to remove diamond pattern while being careful not to cut to the cord.

    • E39823
      E39823-UN-24JUN99

      A - Thumb Screw

      B - Outer Screw

      If using a skiving tool:
      • Lay belt on a flat surface against a back stop.
      • Adjust skiving tool pressure plate to thickness of belt using thumb screw (A).
      • Turn thumb screw (A) down another half turn and lock with outer screw (B).
      • Holding skiver firmly against belt, push skiver along full width of belt.
      • Repeat, if necessary, until diamond pattern is removed.

    Do not leave more than 0.5 mm (0.020 in.) of pattern on belt in area to be laced. If too much material is left on belt, hooks will not fasten properly to belt.

    Do not remove too mush material. If belt cords show, repeat steps 2—4. Make sure belt length is still within specifications. Add section of belt if necessary.

    Illustrations show incorrect and correct examples of diamond pattern removal from belt.

    • E27606
      E27606-UN-12SEP88

      Belt Cross Section

      A - Cut Too Deep

      B - Cut too High

      C - Cut Correctly

      Belt (A) is cut too deep. Damage to belt cords will occur.
    • Belt (B) is cut too high. Hooks will not fully penetrate through the belt.
    • Belt (C) is cut correctly.

    E27614
    E27614-UN-12SEP88

    E27615
    E27615-UN-12SEP88

    More examples of incorrectly cut belts:

    • Middle photo shows vertical cut is too deep; belt cords have been damaged (cut), seriously weakening the belt.
    • Bottom photo shows too much diamond pattern was removed, exposing the belt cords.


  5. Trailing end of belt must be trimmed using dimensions shown in illustration. DO NOT vary from these dimensions.

    E39835
    E39835-UN-27MAR96

    Trim trailing end of belt as shown.


  6. If repair is needed on only one end of belt, count the hooks. There should be 44 hooks for the trimmed end of belt and 45 hooks for the square end of belt.

    E21801
    E21801-UN-25JUN99

    A - Belt Lacing Tool

    B - Hooks

    C - Pin

    Put belt lacing tool (A) in a vise. Set the determined amount of hooks (B) in center of the lacing tool and insert long pin (C) to hold hooks (B) in position.


  7. Remove cardboard holding the hooks together before pressing lacing hooks onto belt end.

    Visually align belt so hooks (B) are centered in belt. Make sure full width of belt is in contact with bottom of lacer. Tighten vise to force the lacing hooks through the belt.

  8. To ensure hooks are clinched correctly, retighten vise on approximately six hooks at a time to exert maximum pressure. Doing this will increase the life of the belt.

    E21802
    E21802-UN-25JUN99

    A - Pressure Plate

    Starting at one end of belt and keeping pressure plate (A) centered in the vise, retighten vise to exert maximum pressure on approximately six hooks at a time.


  9. E21803
    E21803-UN-25JUN99

    A - Pressure Plate

    Always keeping pressure plate (A) centered in the vise, move belt and lacing tool over six hooks and retighten vise.


  10. Repeat procedure until all hooks are clinched.

  11. E21804
    E21804-UN-13SEP88

    A - Points

    Belt splices are properly installed when points (A) come through belt from opposite side and are slightly clinched.


  12. Install belt(s). (See INSTALLING BELTS in this section.)

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