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3.7.7
Knife Speed
The header knife drive is powered by the windrower
hydraulic pump and is controlled using the windrower
Harvest Performance Tracker (HPT) (refer to your
windrower operator’s manual).
The default speed is
1200 strokes per minute (spm).
Table 3.5 D1X Series SP Knife Speed
Header Size
(ft.)
Recommended Knife Speed
Range (spm)
25
1400–1700
30
1200–1600
35
1200–1400
40
1100–1400
45
1100–1400
3.7.8
Reel Height
Crop type and crop condition determine the operating height of the reel. You can create preset reel height positions
using the Headland Management feature on either an M1170 or M1240 Self-Propelled Windrower. To set up this
feature, refer to your windrower operator’s manual. Set the reel height and fore-aft position to carry material past
the knife and onto the drapers with minimal damage to the crop. Refer to
3.7.9 Reel Fore-Aft Position, page 54
.
The reel height can be controlled manually using switches inside the windrower cab, or assigned to button presets on
the ground speed lever (GSL). Refer to your windrower operator’s manual for instructions on controlling reel height
or setting up auto reel height presets.
The following conditions might result if the reel is set too low:
• Crop loss over the header backtube
• Crop disturbance on the drapers caused by the reel
fi
ngers
• Crop being pushed down by the tine tubes
The following conditions might result if the reel is set too high:
• Cutterbar plugging
• Crop lodging and being left uncut
• Grain stalks dropping ahead of cutterbar
Refer to
3.6.2 Header Settings, page 39
to determine recommended reel heights for speci
fi
c crops and
crop conditions.
IMPORTANT:
Maintain adequate clearance to prevent
fi
ngers contacting the knife or the ground. Refer to
.
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