214327 60 Revision B
Table 3.5 Knife Speed Guidelines (continued)
Recommended Knife Speed Range (spm)
Header Size
Single Knife Double Knife
10.7 m (35 ft.)
1100–1300 1200–1400
12.2 m (40 ft.)
1050–1200 1100–1400
Checking Knife Speed
Compare pulley rpm measurement with the values listed in the knife speed chart in this manual.
DANGER
To prevent bodily injury or death from the unexpected start-up of the machine, always stop the engine and remove the
key from the ignition before leaving the operator’s seat for any reason.
1. Shut down the engine, and remove the key from the ignition.
Figure 3.30: Left Endshield
2. Open left endshield (A).
DANGER
Check to be sure all bystanders have cleared the area.
3. Start the windrower engine, engage the header drive, and
run the windrower at operating rpm.
Figure 3.31: Knife Drive Pulley
4. Measure rpm of knife drive box pulley (A) with a hand-held
tachometer.
5. Shut down the windrower.
6. Compare pulley rpm measurement with the rpm values in
the knife speed chart. For instructions, refer to 3.7.9 Knife
Speed, page 59.
7. Contact your MacDon Dealer if the pulley rpm
measurement exceeds the specified rpm range for your
header.
3.7.10 Reel Height
The crop type and condition determines the operating height of the reel.
Set the reel height to carry material past the knife and onto the drapers with minimal disturbance and damage to the cut
crop. For instructions, refer to 3.7.11 Reel Fore-Aft Position, page 61.
OPERATION
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