MacDon CA25 OM - Manual (Page 133)

SECTION 8. MAINTENANCE AND SERVICING
169593
131
Revision B
8.9.2 Sickle Removal
WARNING
Stand to rear of sickle during removal to
reduce risk of injury from cutting edges.
Wear heavy gloves when handling sickle.
a. Stroke sickle to its outer limit, and clean area
around sickle head.
b. Remove zerk from pin (A).
c. Remove nut and bolt (B).
d. Insert screwdriver in groove of pin (A), and pry
up on sickle head pin to free sickle. Pin does
not have to be removed from arm.
e. Seal bearing in sickle head with plastic or tape.
f. Wrap a chain around sickle head, and pull
sickle out.
NOTE
For single drive sickles with splice
plate, remove bolts from splice plate,
and pull sickle out from both ends.
8.9.3 Sickle Head Bearing Replacement
8.9.3.1 Bearing Removal
a. Remove sickle. Refer to previous section.
b. Using a flat-ended tool (D) with approximately
the same diameter as the plug (E), tap out the
seal (F), bearing (G), and plug from the
underside of the head.
NOTE
The seal can be replaced without
removing the bearing. When
changing seal, check pin and needle
bearing for wear. Replace if
necessary.
8.9.3.2 Bearing Installation
a. Place O-ring (C) and plug (E) in sickle head.
IMPORTANT
Install the bearing with the stamped
end (the end with identification
markings) against the tool.
b. Using a flat-ended tool (D) with approximately
the same diameter as the bearing (G), push the
bearing into the sickle head until the top of the
bearing is flush with the step (H) in sickle head.
c. Install seal (F) in top of sickle head with lip
facing outwards.
IMPORTANT
To avoid premature sickle head or
sickle drive box failure, be sure
there is no looseness in:
 fit of sickle head pin and needle
bearing, and
 fit of sickle head pin and pitman arm.
REMOVAL
C
D
H
G
F
E
H
B
A