New Holland 499 Operator's Manual page 80

Knife Section Bolts
Several different length knife section bolts, 1, are
used. The knife head and knife back extension
require longer bolts than those used for the knife
back. Special flat head bolts are also required at the
knife overlap area. Be sure to use the correct type
and length bolts when replacing a knife section bolt.
The LH bolted single section overlap knife uses
thirty-one 5/8" long bolts, three 7/8" long bolts, nine
1" long bolts, six 1/2" long flat head bolts and
forty-nine locknuts.
The RH bolted single section overlap knife uses thirty
5/8" long bolts, nine 7/8" long bolts, nine 1" long
bolts, three 1/2" long flat head bolts and fifty-one
locknuts.
The Left two section overlap knife uses thirty-five
5/8" long bolts, three 7/8" long bolts, nine 1" long
bolts, five 1/2" long flat head bolts and fifty-two
locknuts.
The Right two section overlap knife uses twenty-
eight 5/8" long bolts, five 3/4" long bolts, three 7/8"
long bolts, nine 1" long bolts, six 1/2" long flat head
bolts and fifty-one locknuts.
To remove a bolt; support the knife back, 1, and use
a punch, 2, and hammer to drive the bolt out of the
knife back.
When installing a new bolt, seat the bolt before
installing the nut. Align the serration's on the base of
the new bolt with the grooves in the knife back, 1,
formed by the original bolt. Use a hammer to seat the
bolt.
A special tool, 2, part #KX711426DS, is available to
seat the bolts while the knife assembly is still in the
mower-conditioner.
NOTE: Do not attempt to seat a new bolt using the
lock nut as the threads may strip before the bolt is
seated.
SECTION 4 - MAINTENANCE
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