For Machines Mfg. Since 3/11 | S E R V I C E |
5.Move the retaining ring shown in Figure 130 away from the shroud washer, then move the shroud washer away from the shear pin and against the retaining ring. This will create room for you to remove the shear pin.
Retaining Ring
Figure 130. Shear pin access.
6.Use the magnet to remove the shear pin head.
7.Rotate the lathe spindle to line up the inner and outer bores, as shown in Figure 131, and use the magnet to remove the other half of the broken shear pin.
Inner Bore
Outer Bore
Figure 131. Shear pin bores aligned.
8.Put on safety goggles, insert the blow gun tip into the shear pin hole and blow out the hole with compressed air.
9.Put a drop of oil in the hole, then insert the new shear pin into the bore, as shown in Figure 132.
Note: If the pin does not freely slide into the bore, DO NOT use a hammer on the pin or you may permanently damage the shear mechanism and bore, which would make it nearly impossible to remove if it breaks again. Instead, take the time to carefully line up the two bores so it slides in easily. Chamfer the end of the pin if necessary to make it easier to insert.
Shear Pin
Figure 132. New shear pin installed in bore.
10.With the pin completely seated in the bore and the head flush with the leadscrew shoulder, slide the shroud washer against the shoulder, then rotate the washer 180° to completely cover the head of the shear pin, as shown in Figure 133.
Rotate
Washer
Slot 180°
