New Holland CX720 Operator's Manual page 333

Chaff blower (if installed)
The chaff blower blows all the material coming from
the cleaning shoe into the straw chopper, to spread
the chaff evenly across the full cutting width of the
combine.
Remove the blower when threshing maize or
sunflowers.
CAUTION
Do not use the chaff blower without engaging the
straw chopper.
After disengaging the threshing mechanism, the
chaff blower will continue to run for 15 seconds before
disengaging to evacuate the remaining material.
Never disconnect the hydraulic couplers without
remove the chaff blower completely.
To remove the chaff blower proceed as follows:
1. Disconnect the hydraulic quick-couplers 1 of the
blower.
2. Connect the quick coupling as shown.
IMPORTANT: Avoid possible oil contamination by
properly fitting the blanking plugs into the hydraulic
quick couplers.
3–90
SECTION 3 – FIELD AND SITE OPERATION
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