Page 32 Section 5
Maintenance
MSD SABER SERIES SHEARS
FRONT WEAR PLATE
REPLACEMENT
if equipped
The front wear plate bears against the guide blade to
support the upper shear during operation (see
Figure
5-34
). To prevent damage to the shear, it is crucial to
replace this wear part when it is worn. Replace the
front wear plate when the guide blade gap is greater
than 0.030" (0.75 mm) with a new guide blade and a
full set of shims installed. Whenever the front wear
plate is replaced, also replace the piercing tip. Use the
following instructions to replace the front wear plate.
1.
Preheat the area surrounding the wear plate to
about 200°F (100°C) to remove moisture. Preheat
the area within 6" (150 mm) of the wear plate to a
minimum of 400°F (200°C) and a maximum of 450°
(230°C). Maintain this temperature range throughout
the process. Temperature/melt sticks are available
from Stanley LaBounty.
2.
Air-arc the old wear plate to remove it completely.
Please note that the upper shear has a machined sur-
face for the wear plate.
3.
Use a grinder to make sure the area is fl at and
smooth with all carbon residue removed.
4.
Place the new wear plate into the machined area
existing on the upper. Position the new wear plate so
there is approximately 1/2" (12.7 mm) gap between
the wear plate and the piercing tip, and equal dis-
tances on the other sides of the seat. Clamp the wear
plate into position.
5.
Bring the preheat back up to 400°F (200°C) and tack
the tip in place.
The upper shear must be grounded when
welding on the upper shear to prevent the
possibility of electric shock and arcing through
the cylinder or main pivot components.
Check temperature frequently during this procedure.
Maintain 400-450ºF (200-230ºC). Do not exceed 450º
(230ºC).
FRONT WEAR PLATE
FIGURE 5-34
NOTICE
