VHS-30/3, VHS-40/3, VHS-50/3, VHS-60/3 and VHS-70/3 Demolition and Scrap Shears Caterpillar

Inspect the Wear Tip

1. Clean the shear.

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Illustration 1	g01449760

2. Place the shear in a horizontal position. Open the jaws of the shear.

3. Lock the jaws in an open position. The following procedures describe maintaining the jaws in the open position.
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   Illustration 2	g01727374
   Lock for the hydraulic cylinder on the VHS-30/3, VHS-40/3, VHS-50/3, VHS-60/3 B1X00137-UP, and VHS-70/3 B1Y00135-UP shears

   1. In order to hold the shear in the open position for the VHS-30/3, VHS-40/3, VHS-50/3, VHS-60/3 , B1X00137-UP, and VHS-70/3 , B1Y00135-UP, insert shear lock (1) through the hole on the side of the shear. Slide the pipe on the shear lock (1) all the way through the shear. Insert bolt (2) into the hole in the end of the pipe. Install nut (3) onto the bolt. Refer to Table 1 for the part numbers of the shear locks.
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   Illustration 3	g01727389
   Lock for the hydraulic cylinder on the VHS-60/3 B1X01-00136 and VHS-70/3 B1Y01-00134 shears

   2. In order to hold the shear in the open position for the VHS-60/3 , B1X01-00136 and VHS-70/3 , B1Y01-00134, install shear lock (4) onto cover (6) . The shear lock must be installed behind guide block (5) for the cover. Refer to Table 1 for the part numbers of the shear locks.

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Illustration 4	g01450249

4. Inspect wear tip (4) for excessive wear or damage. Check wear tip (4) for cracks.

Replace the Wear Tip

1. Clean the shear.

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Illustration 5	g01449760

2. Place the shear in a horizontal position. Open the jaws.

3. Lock the jaws in an open position. Refer to , "Inspect the Wear Tip" for more information.

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Illustration 6	g01450255

4. In order to prevent damage to cutting edge (5) , remove cutting edge (5) from the upper jaw.

5. Grind existing wear tip (4) in order to remove wear tip (4) . The existing wear tip (4) can only be removed by grinding the wear tip off.

6. After you remove the old wear tip, grind the surface of the upper jaw. The surface should be clean and free of rust.

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Illustration 7	g00878756
(D) 40 degrees (E) 10 mm (0.39 inch) for the S365B and the S385B

7. Grind a bevel to width (E) with an angle (D) on the nose of the upper jaw in order to create a space for welding the wear tip onto the upper jaw.

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Illustration 8	g01450257
(6) Template (7) Reference surface

8. Place template (6) against reference surface (7) in order to determine the location of the new wear tip. Place the new wear tip onto the upper jaw of the shear.

9. Tack weld the new wear tip to the upper jaw of the shear. Check for proper positioning.

10. Preheat the surface of the nose of the upper jaw to 150 °C (302 °F) to 200 °C (392 °F).
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    Table 2

    Sales Model	Wear Tip	Welding Height (X)	Welding Height (Y)	Welding Height (Z)	Welding Height (W)	Distance (S)	Distance (T)
    VHS-30/3	294-0198	6 mm (0.236 inch)	18 mm (0.709 inch)	15 mm (0.591 inch)	15 mm (0.591 inch)	11 mm (0.433 inch)	12 mm (0.472 inch)
    VHS-40/3	294-0714	6 mm (0.236 inch)	18 mm (0.709 inch)	15 mm (0.591 inch)	15 mm (0.591 inch)	11 mm (0.433 inch)	15 mm (0.591 inch)
    VHS-50/3	294-0715	6 mm (0.236 inch)	18 mm (0.709 inch)	15 mm (0.591 inch)	15 mm (0.591 inch)	13 mm (0.512 inch)	15 mm (0.591 inch)
    VHS-60/3	226-0732	6 mm (0.236 inch)	15 mm (0.591 inch)	20 mm (0.787 inch)	15 mm (0.591 inch)	10 mm (0.3937 inch)	6 ± 15 mm (0.236 ± 0.591 inch)
    VHS-70/3	226-0732	6 mm (0.236 inch)	15 mm (0.591 inch)	20 mm (0.787 inch)	15 mm (0.591 inch)	10 mm (0.3937 inch)	6 ± 17 mm (0.236 ± 0.669 inch)

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Illustration 9	g01150459
(A) Hard surfacing

11. In order to weld the wear tip, use welding material AWS A5.28-96: ER100S-G. Weld the wear tip onto the upper jaw. Refer to Illustration 9. Refer to Table 2 for the height of each weld for each shear. The procedure for the hard surfacing needs the following items:
    • Lincoln Wear Shield ME welding rod

    • ESAB Wear Arc-5 welding rod

    • Welding materialDIN8555 MF6-55GP

    • Welding material with chemical composition mentioned in Table 3.

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    Table 3

    C (%)	Mn (%)	Si (%)	Cr (%)	Mo (%)	Hardness Hrc
    0,5-0,8	0,6-1,0	0,6-1,0	4,5-6,5	0,8-1,2	56-61

12. Grind the surface flat with the shape of the upper jaw.

13. Once the jaw has cooled, install cutting edge (5) .

Procedure for the Buildup and Hard Surfacing of the Wear Tip

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Personal injury or death can result from fumes, gases and ultraviolet rays from the weld arc. Welding can cause fumes, burn skin and produce ultraviolet rays. Keep your head out of the fumes. Use ventilation, exhaust at the arc, or both, to keep fumes and gases from your breathing area. Wear eye, ear and body protection before working. Protect yourself and others; read and understand this warning. Fumes and gases can be dangerous to your health. Ultraviolet rays from the weld arc can injure eyes and burn skin. Electric shock can cause death. Read and understand the manufacturer's instructions and your employer's safety practices. Do not touch live electrical parts.

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Personal injury can result from flame cutting or welding on painted areas. The effect of gasses from burned paint is a hazard to the person doing the cutting or welding. Do not flame cut or weld on painted areas.

Buildup of the Wear Tip

1. Clean the shear.

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Illustration 10	g01449760

2. Place the shear in a horizontal position. Open the jaws.

3. Lock the jaws in an open position. Refer to , "Inspect the Wear Tip" for more information.

4. Inspect wear tip (B) for excessive wear or excessive damage.

5. Check wear tip (B) for cracks.

   Note: Replace wear tip (B) if excessive damage, wear, or cracks are noticed. Refer to , "Wear Tip Inspect/Replace".

6. Remove the paint from the surface of the upper jaw (C) , that is needed to be built up.

7. Grind surfaces.

8. Use the welding material AWS A5.28-96:ER100S-G to repair the area.

9. Preheat the specific area to a minimum of 150 °C (302 °F) and no higher than 200 °C (392 °F).

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Illustration 11	g01142044
The side of the shear with the cutting edge

10. Build up original shape. Weld in the direction of the arrow. Refer to illustration 11. Use a straightedge (A) to check the surface. Refer to illustration 11.

    Note: The wear tip (B) must be flush with cutting edges (D) .

11. Cool the weld slowly to room temperature. Wrap the weld in an insulating blanket in order to allow the weld to cool over several hours.

    Note: Building up the wear tips should be performed at the end of the day or at a time when the weld will have plenty of time in order to cool. The weld should have plenty of time in order to cool before the shear is placed back into operation.

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Illustration 12	g01142055
The side of the shear with the wear plate

12. Repeat step 6 through 10 for the wear plate (G) side. Weld in the direction of the arrow. Refer to illustration 12.

    Note: The wear tip (B) must be flush with the wear plate (G) .

13. Cool the weld slowly to room temperature. Wrap the weld in an insulating blanket in order to allow the weld to cool over several hours.

    Note: Building up the wear tips should be performed at the end of the day or at a time when the weld will have plenty of time in order to cool. The weld should have plenty of time in order to cool before the shear is placed back into operation.

Hard Surfacing of the Wear Tip

1. Clean the shear.

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Illustration 13	g01449760

2. Place the shear in a horizontal position. Open the jaws.

3. Lock the jaws in an open position. Refer to , "Inspect the Wear Tip" for more information.

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Illustration 14	g01450335
Template

4. Remove all the debris from the welds. Grind surface (5) .

5. The procedure for the hard surfacing needs the following items:
   • Lincoln Wear Shield ME welding rod

   • ESAB Wear Arc-5 welding rod

   • Welding materialDIN8555 MF6-55GP

   • Welding material with chemical composition mentioned in Table 4.

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   Table 4

   C (%)	Mn (%)	Si (%)	Cr (%)	Mo (%)	Hardness Hrc
   0,5-0,8	0,6-1,0	0,6-1,0	4,5-6,5	0,8-1,2	56-61

6. Preheat the specific service area to 150 °C (302 °F) to 200 °C (392 °F).

7. Weld in the direction of the arrow. Refer to illustration 14.

8. Cool the weld slowly to room temperature. Wrap the weld in an insulating blanket in order to allow the weld to cool over several hours.

   Note: Building up the wear tips should be performed at the end of the day or at a time when the weld will have plenty of time in order to cool. The weld should have plenty of time in order to cool before the shear is placed back into operation.

9. Remove all the debris from the welds.

10. Use template (Z) in order to check the surface (5) of the upper jaw (C) . Refer to illustration 14.

11. Place template (Z) along reference surface (8) until template (Z) is even with surface (6) of the nose of the upper jaw (C) . If necessary, grind the nose of the upper jaw (C) until the nose of the upper jaw (C) matches the template.

12. Unlock the upper jaw (C) . Refer to , "Inspect the Wear Tip". Carefully close the upper jaw.

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Illustration 15	g01142280
checking the fit

13. Check the fit (H) of the wear tip (B) into the shear housing (K) . Grind the surface, if necessary. Lock the upper jaw (C) in the open position. Refer to , "Inspect the Wear Tip".

14. Paint the welded area with primer. Allow the primer to completely dry. Paint the welded area with a final coat of paint. Remove the lockon the upper jaw (C) . Refer to , "Inspect the Wear Tip".