MacDon CA25 OM - Manual (Page 86)

SECTION 7. OPERATION
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84
Revision B
7.11 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 the combine feeder house is
level. Refer to your 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 (so header can
float).
c. Check and set float adjustment. Refer to
Section 7.9.2 Header Float.
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
one-half turn of nut (A).
1. Turn low-side nut clockwise to raise
header.
2. Turn high-side nut counterclockwise 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
1/8 inch (2 to 3 mm) clearance
between frame and back of bellcrank
lever as shown.
NOTE
Float does not require adjustment
after levelling header.
B
A
1/8 in. (2 – 3 mm) MIN.