New Holland CX720 Operator's Manual page 287

DRUM SPEED
The drum speed is adjustable electro-hydraulically
from the operator's platform and can be read from the
InfoViewt monitor.
NOTE: It's only possible to change the drum speed
with the threshing mechanism engaged.
IMPORTANT: To protect the drum variator belt:
• Never work with a minimum drum speed.
• Immediately disengage
mechanism when a drum blockage occurs.
DRUM BLOCKAGE
Should the drum become blocked, proceed as
follows:
1. Clean the header and the straw elevator by using
the reverser. Refer to paragraph "Header and
straw elevator reversing system" of this Section.
2. Lower the drum, beater and rotary separator
concave to its lowest position and try to unblock
by engaging the threshing mechanism.
NOTE: When engaging the threshing mechanism,
the engine speed start automatically at 1500 rpm.
3. If this is ineffective, remove part of the slug and
try to unblock the drum by using the drum socket
wrench 1. (only when the standard drum variator
is fitted).
NOTE: To engage the threshing mechanism at high
engine rpm, hold the engine throttle rocker switch in
the increase position while the thresher is engaged.
The drum socket wrench 1 is located at the back
of the grain elevator.
3–44
SECTION 3 – FIELD AND SITE OPERATION
the threshing
51
52