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SETTINGS AND ADJUSTMENTS
SECTION 4-4
Adjusting or Replacing Bed Knives
LOOSEN THE MOUNTING SCREWS
Select either the upstroke knife or the down-stroke knife
for first removal.
Loosen the bed knife screws with a 30 mm socket
mounted on a breaker bar. These screws are tightened to
a torque of 472 ft Ibs (640 Nm) so make sure you have
the proper breaker bar (a four foot long (1.2 m) bar with a
3/4 inch (19 mm) drive is suggested). Make sure you
have solid footing while you apply the breaking force.
REMOVE THE FIRST KNIFE CLAMP OR SHIELD
Remove the screws on one half of the selected bed
knife using a 30 mm socket or equivalent wrench.
NOTE: When removing the knife clamp on the upstroke knife
(the similar piece on the down-stroke knife is called knife
shield), hold the clamp while removing the last screw to keep it
from slipping off its inclined mounting surface. The knives will
not slip off because they are, secured by the captive adjusting
screws.
Keep the screws for reinstallation or use new factory-
sup- plied screws of the same specification for
replacement.
Repeat the removal procedure for the remaining knife
clamps and shields.
REMOVE THE BED KNIVES
Remove the bed knives by lifting each half until the
captive screws are clear of their slots.
Remove the second bed knife using the same
procedure.