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

Inspect the Wear Plates

1. Clean the shear.

Show/hide table



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.
   Show/hide table
   
   

   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.
   Show/hide table
   
   

   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.

Show/hide table



Illustration 4	g01450015

4. Inspect all wear plates (L) for excessive wear or damage. If the wear plates (L) have excessive wear or damage, wear plates (L) must be replaced.

   Note: New wear plates contain cracks, due to the hardness of the material. Cracks on new wear plates are not caused from wear or damage.

Replace the Wear Plates

1. Clean the shear.

Show/hide table



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 Plates" for more information.

Show/hide table



Illustration 6	g01450015

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

5. Grind the surface of the end plate (Z) . The surface should be clean and free of rust.

6. Remove the paint from the end plate (Z) .
   Show/hide table

   Table 2

   SHEAR	VHS-30/3	VHS-40/3	VHS-50/3	VHS-60/3	VHS-70/3
   (A1)  (1)	N/A	N/A	N/A	30 ± 3 mm (1.18 ± 0.12 inch)	20 ± 3 mm (0.79 ± 0.12 inch)
   (A2)  (2)	(Left Plate) 40 ± 3 mm (1.58 ± 0.12 inch) (Right Plate) 30 ± 3 mm (1.18 ± 0.12 inch)	(Left Plate) 50 ± 3 mm (1.97 ± 0.12 inch) (Right Plate) 20 ± 3 mm (0.79 ± 0.12 inch)	35 ± 3 mm (1.38 ± 0.12 inch)	N/A	N/A
   (B)	N/A	N/A	N/A	30 ± 3 mm (1.18 ± 0.12 inch)	30 ± 3 mm (1.18 ± 0.12 inch)
   (C)	40 ± 3 mm (1.58 ± 0.12 inch)	25 ± 3 mm (0.98 ± 0.12 inch)	20 ± 3 mm (0.79 ± 0.12 inch)	20 ± 3 mm (0.79 ± 0.12 inch)	20 ± 3 mm (0.79 ± 0.12 inch)
   (K)	10 ± 3 mm (0.39 ± 0.12 inch)	20 ± 3 mm (0.79 ± 0.12 inch)	35 ± 3 mm (1.38 ± 0.12 inch)		20 ± 3 mm (0.79 ± 0.12 inch)
   (H)	8 mm (0.32 inch)	8 mm (0.32 inch)	8 mm (0.32 inch)	8 mm (0.32 inch)	10 mm (0.39 inch)
   Wear Plates (L)	317-7247 (2x)	316-4933 (2x)	234-5067 (1x) 235-0916 (2x)	235-0916 (3x)	234-5067 (3x)

   Show/hide table

   ( 1 )	Measure to the bottom of the wear plates
   ( 2 )	Measure to the top of the wear plates

   Note: New wear plates contain cracks, due to the hardness of the material. Cracks on new wear plates are not caused from wear or damage.

Show/hide table



Illustration 7	g01450039
Typical example for locations of wear plates

7. Tack weld the new wear plates (L) to the end plate (Z) of the housing (Y) . Check for proper positioning. Refer to table 2 and illustration 7 for dimensions and part numbers of the wear plates.

8. Preheat the surface of the end plate (Z) to 150 °C (302 °F) to 200 °C (392 °F).

9. In order to weld the wear plate (L) , use welding material AWS A5.28-96: ER100S-G.

10. 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: Replacing the wear plates 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.

11. Remove all debris from the welds. Paint the welded area with primer. Allow primer to completely dry.

12. Paint the welded area with a final coat of paint.

13. Remove the shear lock. Refer to , "Inspect the Wear Plates" for more information.