New Holland 499 Operator's Manual page 47

ROLL GAP
IMPORTANT: The rolls must not contact each other
at any point or damage to the rolls and header frame
may result. Adjust roll to a minimum of 0.4 mm (1/64")
clearance at the closest point of the rolls..
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.
Never adjust, lubricate, clean or unplug machine
with the engine running. Failure to comply could
result in death or serious injury.
SECTION 2 - OPERATION
10004581
2-19
0.4 mm
(1/64")
27