MAC215990
134
Revision A
NOTE:
Excessive reel speed will also cause the reel circuit to go over relief. The reel will speed up and slow down at each bat
when operating in heavy, tough, and lodged crops. Reducing the reel speed, so it is closer to the ground speed, will still
allow the reel to lift the crop while not trying to pull it out of the ground. This will also reduce seed loss from the reel trying
to comb through the crop, instead of just lifting it.
Slower reel speeds can be used with nine-bat reels, which is advantageous in shatter-prone crops.
For recommended reel speeds in specific crops and conditions, refer to
3.7.2 Header Settings, page 66
The reel speed is adjustable using the controls in the combine cab. For instructions, refer to the combine operator
’
s
manual for adjustment details.
Optional Reel Drive Sprockets
Optional sprockets for use in specific crop conditions are available as an alternative to the factory-installed single sprocket.
The header is factory-equipped with a 19-tooth reel drive single sprocket, which is suitable for most crops. Replacing the
19-tooth reel drive single sprocket with optional dual reel drive sprocket (A) will provide more torque to the reel in heavy
cutting conditions. With the optional dual reel drive sprocket installed, an optional 52-tooth sprocket (B) can also be added
on top of the existing 56-tooth lower sprocket that will allow for higher reel speed in light crops when operating at
increased ground speed. With these two optional sprockets installed, switching from high-torque to high-speed and vice
versa will be quick and easy. For sprocket information, refer to Table , and
. Contact your MacDon Dealer for
ordering information.
1034003
A
B
Figure 3.144: Reel Drive with Optional Sprockets
A - Dual Reel Drive Sprocket (MAC273451, MAC273452, or
MAC273453)
56
B - 52-Tooth Sprocket (MAC273689)
57
56. These sprockets are sold separately (individual parts).
57. This sprocket is included in kit MAC311882.
