MacDon CA25 OM - Manual (Page 136)

SECTION 8. MAINTENANCE AND SERVICING
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Revision B
Pointed Guards: Double Knife
Refer to previous section for typical guard
replacement.
The guard near center of double knife header
(where the two sickles overlap) requires a
slightly different replacement procedure.
Replace center guard or center top guide as
follows:
a. Remove two nuts (A) and bolts that attach
guard (B) and top guide (C) to cutterbar.
b. Remove guard, poly wear plate (if installed), top
guide (C), and adjuster bar (D).
c. Position poly wear plate (if applicable),
replacement guard (B), adjuster bar (D), top
guide (C). Install bolts, but do not tighten.
IMPORTANT
Ensure center guard (B) (right of
cutterbar split) has offset cutting
surfaces.
NOTE
Top guide (C) must accommodate the
two overlapping knifes at center guard
location on Double Knife header.
Ensure replacement is correct part.
d. Check and adjust clearance between hold-
down and sickle. Refer to Section 8.9.7 Sickle
Hold-Downs.
Stub Guards: Single Knife
Stub guards, complete with top guides and
adjuster plates are designed to cut tough crops.
Some configurations of the D65 header come
equipped with stub guards at the outer ends.
Replace stub guards as follows:
a. Remove the two nuts (E) and bolts that attach
guard (F) and top guide (G) to cutterbar.
b. Remove guard, poly wear plate (if installed), top
guide, and adjuster bar (H).
c. Position poly wear plate (if applicable),
replacement guard (F), adjuster bar (H), top
guide (G), and install bolts. Do not tighten.
IMPORTANT
Note position of mitre on adjuster
bar (H). Bar should be re-installed
in same position. Mitres should not
be adjacent to each other.
IMPORTANT
The first four outboard guards on
drive side(s) of the header do NOT
have a ledger plate. Ensure that the
proper replacement is installed.
d. Check and adjust clearance between top guide
and sickle. Refer to Section 8.9.7 Sickle
Hold-Downs.
DRIVE SIDE NORMAL
NORMAL CENTER
B
C
G
E
H
F
D
A
C
B