MacDon A40-D - Manual (Page 127)

SECTION 7 MAINTENANCE AND SERVICING
169000 / 169040
125
Revision E
7.8.7.2.4 Stub Guard Replacement: Double
Knife
Refer to previous section for typical guard
replacement.
The guard near the center of the double knife
header, where the two sickles overlap, requires
a slightly different replacement procedure.
IMPORTANT
Replace adjacent guards when replacing
center guard.
a. Remove two nuts (A) and bolts that attach
center guard (B) and top guide (C) to cutterbar.
b. Remove guard and top guide and adjuster bar
(D).
IMPORTANT
Ensure center guard (B) has offset cutting
surfaces. See illustration.
NOTE
Top guide (C) (which is an inverted stub
guard) must accommodate the two
overlapping knifes at center guard
location on double knife header. Ensure
replacement is correct part.
IMPORTANT
Ledger surfaces of center and adjacent
guards must be vertically aligned to avoid
interference with sickle sections.
c. Position replacement guard (B), adjuster bar (D),
top guide (C), and install bolts and nuts (A).
Do not tighten.
d. Check and adjust clearance between hold-down
and sickle. Refer to Section 7.8.8 Sickle Hold-
Downs.
CENTER STUB GUARD AND HOLD-DOWN (SICKLES STROKED FULLY IN)
D
A
B
TOP GUIDE (C) IS AN
INVERTED STUB GUARD
C
OFFSET CUTTING SURFACES ALIGNED CUTTING SURFACES ALIGNED
INVERTED SECTION
NORMAL CENTER