MacDon 873 Combine Adapter - Manual (Page 24)

Form # 147069 Issue 09/06 22
OPERATION
HEADER LEVELLING
NOTE: The following applies if gap (A) is zero. If float is set light (operating cutterbar on ground), then level
header by adjusting main float springs.
Adjust header levelling with header at the flattest angle. See Header Angle, next page.
1. With header on level ground, lower header so cutterbar is 2 to 4 inches (50 to 100 mm) off the ground.
2. Check level of header by measuring cutterbar to ground at both ends.
3. To lower cutterbar on one end, remove a shim (C) from under rubber pad (B) in down stop assembly.
Adjust shim quantity side to side, placing from 0 to 2 shims to level header.
To add or remove a shim:
•
Lower cutterbar to ground and continue
lowering feeder house so gap at (A)
increases.
•
Remove nuts (H), disassemble and add or
remove shim(s) as required.
•
Reassemble and adjust header flotation to
gap (A) setting recommended in Header
Floatation section. Note the different
positioning of the pad assembly on the
support, depending on header model and
combine configuration:
•
963/972 mounted on combines with
dust shields removed – position (D) –
inboard set of side-by-side holes.
•
963/972 mounted on combines with
dust shields on – position (F). – fore-aft
set of holes.
•
973 on all combines – position (D) –
inboard set of side-by-side holes.
•
974 on all combines – position (E) –
outboard set of side-by-side holes.
NOTE: To simplify this procedure: With header
adjusted to steepest angle (longest top
link length) and fully floated, the entire
down stop assembly can be removed by
removing pin (G).
G
A
HEADER LEVELLING - L/H SHOWN
(DOWN STOP PAD ORIENTATION)
B
C
H