New Holland 499 Operator's Manual page 79

Open the vise jaws, 1, just enough for the rivet head
to clear the jaws or support the knife back on a solid
surface on each side of the rivet(s) to be removed.
Use a punch to drive the rivets out of the knife back.
Install new rivets in the knife back. Place the rivet
heads and the knife back on a solid surface, 1. Place
the new section over the rivets. Use a heavy hammer
to strike the rivet to expand it to fill the holes in the
knife back and section. Peen the rivet so the top is
rounded to prevent crop from being caught on the
rivet.
NOTE: When replacing a section in the overlap area,
be sure the flat head rivets are flush with or below the
knife surface. Use a file to make the heads flush if
required.
Bolted Knife Assemblies
The knife sections are fastened to the knife back with
two special bolts and lock nuts, 1. A knife section can
be replaced without removing the complete knife
assembly from the mower-conditioner. On machines
with standard guards, it will be necessary to remove
a hold-down clip to replace certain sections. On
machines with stub guards, remove the hold-down
clip to replace a section. Remove the special bolts
that attach the knife head to replace a section under
the head.
NOTE: When replacing a section in the overlap area,
be sure the flat head bolts are flush with or below the
knife surface. Use a file to make the heads flush if
required.
To remove a knife section, remove the lock nuts from
the special bolts and lift the section off the knife back.
Clean any crop build up off the knife back.
To install a new section, place the section over the
bolts and install the lock nuts. Torque the lock nuts to
a maximum of 8-11 N⋅m (70-100 inch pounds).
SECTION 4 - MAINTENANCE
4889--09
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