MacDon A40-D - Manual (Page 122)

SECTION 7 MAINTENANCE AND SERVICING
169000 / 169040
120
Revision E
7.8.3 Sickle Installation
WARNING
Stand to rear of sickle during installation to
reduce risk of injury from cutting edges.
Wear heavy gloves when handling sickle.
IMPORTANT
Align guards, and re-set sickle hold-downs
while replacing sickle.
a. If sickle head pin (A) is installed in the sickle
head (B), remove the pin.
b. Slide sickle into place, and align sickle head (B)
with pitman arm.
c. Install sickle head pin (A) in pitman arm (C), and
tap it down into the sickle head, ensuring pin is
bottomed out in the sickle head.
d. Tap underside of the sickle head until pin is flush
with the upper face of the pitman arm (C).
e. Carefully adjust to achieve a 0.010 in. (.25 mm)
gap at (D) with the knife laying flat on the first
few guards.
f. Replace bolt (E) and nut.
g. Tighten nut to 160 ft·lbf (220 N·m).
h. Replace grease zerk (F) in pin.
i. Grease bearing (if it has been replaced).
7.8.4 Sickle Head Bearing Removal
a. Remove the sickle. See Section 7.8.2 Sickle
Removal.
b. Using a flat-ended tool (G) with approximately
the same diameter as the plug (H), tap out the
seal (J), bearing (K), and plug (H) 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.
7.8.5 Sickle Head Bearing Installation
a. Place O-ring (L) and plug (H) in sickle head.
IMPORTANT
Assemble bearing with the stamped end
(the end with identification markings)
against the tool.
b. Using a flat-ended tool (G) with approximately
the same diameter as bearing (K), push bearing
into the sickle head until the top of the bearing is
flush with the step (M) in sickle head.
c. Install seal (J) 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 the following:
 Fit of sickle head pin and needle bearing.
 Fit of sickle head pin and pitman arm.
d. Install sickle.
C
A
E
D
B
REMOVAL
G
K
H
L
M
J
F