MacDon CA20 Operators Manual - Manual (Page 65)

OPERATION
Form 169009 63 Model Year - 2009
7.3.6 HEADER LEVELLING
The adapter is factory set to provide the proper
level for the header and should not normally
require adjustment. If the header is not level,
perform the following checks prior to adjusting
the leveling linkages.
IMPORTANT
The adapter float springs are not used to
level the header.
• Check combine tire pressures.
• Check that combine feeder house is level.
Refer to combine Operator’s Manual.
• Check that top of adapter is level with
combine axle.
Make fine adjustments to header leveling as
follows:
a. Park combine on level ground.
b. Check float lock is disengaged (header can
float).
c. Check and set float adjustment. Refer to
previous section.
d. Set header approximately 6 inches (150 mm)
off ground and check that float linkage is
against down stops. Note high and low end of
header.
e. Adjust level with nut (A) at each float lock as
follows. Use small adjustments (1/4 -1/2 turn)
and adjust each side equally but in opposite
directions:
NOTE
Set screw (B) does not require loosening
for adjustments up to ½ turn of nut (A).
1. Turn low-side nut clockwise to raise
header.
2. Turn high-side nut counter-clockwise to
lower header.
NOTE
Adjustment of more than two turns in
either direction may adversely affect
header float. Always be sure there is a
minimum 2 to 3 mm (1/8”) clearance
between frame and back of bellcrank
lever as shown.
NOTE
Float does not require adjustment after
levelling header.
A
B
0.12 in. (2-3 mm)
MIN .