McIntyre 407 - Replacing or Turning the Bottom Blade; Starting the Shear after Changing or Turning the Blades

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320/407/500/600.41912-ENG
• With a soft drift or peg spanner tighten the Pivot Lock Nut, Item 1.22, as far as
possible.
• Replace Grub Screw and tighten.
• Re-tighten the Take-Up Screw and its Lock Nut.
6.6.4. Replacing or Turning the Bottom Blade
Before replacing or turning the Bottom Blade remove any side movement from the Main
Pivot as any side movement will negate Bottom Blade setting and will reduce cutting
efciencyandBladelife.
• Close the Top Jaw, stop and isolate the Shear from the electrical supply.
• Remove the Bottom Blade, Blade Back Up Plate and Anvil Bracket, Items 1.37,
1.38 and 1.40.
• Unscrew the Dog Point Grub Screws, Items 1.42, until they are no longer protruding
from the Bottom Jaw.
• InspecttheBottomJawandBackUpPlate,theyshouldbeatandfreefromany
burrs,leoffanyburrsorchangetheBackUpPlateifnecessary.
• File off any burrs from the Bottom Blade, and select a new cutting edge or replace
with a new item. Then slide the Back Up Plate and Bottom Blade into place.
• RettheAnvilBracket,thenlooselyttheFasteners,Items1.41.
• Adjust the Fasteners and the Grub Screws, using feeler gauges, until the clearance
between the Top and Bottom Blades is 0.05mm along the length of the Blade.
• Ensure all the Fasteners are fully tightened, this should increase the clearance to
0.1mm along the length of the Blade. This is the correct clearance setting.
Never set the Blades in hard contact with each other.
• At no time must the Top and Bottom Blades be set in hard contact with each other,
this can be dangerous to the Operator and will also result in short Blade life.
• The Fasteners should not protrude from the Blades when fully tightened, Rectify if
this is the case.
6.6.5. Starting the Shear after Changing or Turning the Blades
Before starting the Shear ensure the Blade Guard is in place and correctly positioned.
Never operate the Shear with the Blade Guard removed