New Holland 499 Operator's Manual page 82

SECTION 4 - MAINTENANCE
Center Guards
A modified center guard allows the knives to overlap.
Standard style guards, 1, used on machines with a
single overlap section have a larger opening, 2,
between the top lip and the ledger surface on the left
1
guard point. The left part of the knife support rib is
also machined lower.
Standard style guards, 3, used on machines with two
overlapping sections have a larger opening, 4,
between the top lip and the ledger surface on both
guard points.
2
Stub style guards used on machines with a single
overlap section have the ledger surface on the left
guard point and the left part of the knife support rib
machined lower.
The center stub style guard used on machines with
two overlapping sections is a regular stub guard that
3
is installed with a shim between the guard and cutter
bar.
NOTE: Do not use a regular guard in place of the
special center guards. The knives will not pass
through the guard. Severe damage to the knife or
drive may result.
4
WARNING
Disengage the PTO, turn off the tractor engine
and remove the key. Wait for all movement to
stop before leaving the operator's position.
31
Never adjust, lubricate, clean or unplug machine
with the engine running. Failure to comply could
result in death or serious injury.
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