MacDon 873 Combine Adapter - Manual (Page 22)

Form # 147069 Issue 09/06 20
OPERATION
963/972/973 HEADER FLOTATION
Header Floatation for 963 Headers with Gauge Wheel/Transport Wheel (continued):
3. Position the header at desired cutting height with
gauge wheel pins install in the appropriate position.
At this position inspect the gap at (B) to ensure that
the gauge wheel springs are not pushing the header
off the float down-stop pads. If this is true proceed to
step 4. If gap at (B) is between 0 to 1/2 inch (0 to 13
mm) proceed to step 4.
If gap at (B) is larger than 1/2 inch:
a.) Lift up on crop divider to check the header’s
floatation. If float is lighter than 100 lbs (445 N)
continue on with setting procedure, if not check to
see how many coil springs are installed in the
gauge wheels. If two springs are installed
remove one spring from each side and repeat
step 3.
b.) If only 1 spring is present in the gauge
wheels, move pin to the next available hole.
Ex. Move pin from position 1 to position 2 or
from position 2 to the stand position
4. Adjust float to desired setting [recommended 80
to 100lbs (355 to 445N) while keeping 0 to 1/2
inch (0-13 mm) gap at (B). Measure gap with
header at desired cutting height.
Loosen jam nuts (D) and turn adjustment bolts
(C) clockwise to increase float.
Loosen jam nuts (D) and turn adjustment bolts (C) counterclockwise to decrease float.
NOTE: Settings may require re-adjustment after an adjustment to header angle or reel position.
FLOAT ADJUSTMENT
D
C
B