Step 13. Set Knife Speed - MacDon M105 Assembly Instructions Manual

STEP 13. SET KNIFE SPEED

The knife speed is manually set by making
adjustments to the knife drive pump, and has
been pre-set at the factory.
performance, adjust the knife speed according
to the header being used. See the table below.
The knife speed should stay within the
range specified for each header.
HEADER DESCRIPTION
SIZE
TYPE
(FT)
15
20 and 25
Draper DK
30
35
20 and 25
Draper SK 30
35
Grass Seed
Auger A40-D
All
Auger A30-D
Auger A30-S
RPM = speed of wobble box pulley.
SPM = strokes per minute of knife (RPM x 2).
a. Determine the knife speed as follows if the
machine is not equipped with the optional
module:
CAUTION
Check to be sure all bystanders have
cleared the area.
1. Run engine at maximum rpm with the
HEADER DRIVE engaged and ISC off (see
STEP 12. PROGRAM CDM).
2. Check wobble box pulley speed with a
hand-held tachometer.
Form 169558
UNLOADING AND ASSEMBLY
For optimum
NOTE
KNIFE SPEED
MINIMUM MAXIMUM
RPM SPM RPM
750 1500 950
700 1400 850
800
700
600 1200
750
700
550 1100
700 1400 975
775 1550 925
625 1250 775
3. Multiply the rpm reading by two for the knife
speed in strokes per minute.
b. Determine the knife speed as follows if the
machine is equipped with the optional module:
1. Run engine at maximum rpm with the
HEADER DRIVE engaged and ISC off (see
STEP 12. PROGRAM CDM).
SPM
1900
1700
1600
1400
1500
2. Press SELECTOR button on the GSL until
the CDM displays the knife speed in SPM.
1400
c. If required, adjust knife speed as follows:
1950
1850
Stop engine, and remove key from ignition
1550
before leaving Operator's seat for any
reason. A child or even a pet could engage
an idling machine.
1. Shut down engine, and open engine hood.
2. Loosen jam-nut (A).
37
DISPLAY SELECTOR
FOR UPPER LINE
DANGER
A
B
(continued next page)
DISPLAY
Revision A