214323
89
Revision B
Checking Knife Speed
Compare the knife drive box 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.
1009301
A
Figure 3.101: Left Endshield
2.
Open left endshield (A).
DANGER
Check to be sure all bystanders have cleared the area.
3.
Start the combine engine, engage the header drive, and run
the combine at operating rpm.
4.
Run adapter and header for 10 minutes to warm up oil to
38°C (100°F).
NOTE:
For combines with variable speed feeder houses, check the
knife speed with the feeder house at the slowest speed.
Refer to Table
for combine feeder house
speed values.
1009302
A
Figure 3.102: Knife Drive Pulley
5.
Measure rpm of knife drive box pulley (A) with a hand-held
tachometer.
6.
Shut down the combine.
7.
Compare pulley rpm measurement with the rpm values in
the knife speed chart. For instructions, refer to
8.
Contact your MacDon Dealer if the pulley rpm
measurement exceeds the specified rpm range for your
header.
3.7.9
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
3.7.10 Reel Fore-Aft Position, page 90
The reel height is controlled using switches in the combine cab.
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