MacDon 974 FlexDraper - Manual (Page 48)

Form # 147083 Issue 01/07 46
MAINTENANCE/SERVICE
SICKLE AND SICKLE DRIVE (continued)
To Remove Sickle
WARNING: Always stand to rear and
grasp rear edge of sickle during
removal to reduce risk of injury from
cutting edges. Wear heavy gloves
when handling sickle.
1. Clean area around sickle head. Stroke sickle to
its outer limit and remove bolt (A).
2. Insert screwdriver in slot (B) and pry up on
sickle head pin to free sickle.
NOTE: For ease of disassembly, remove
grease fitting from pin to release vacuum.
3. Stroke pitman arm to clear bearing in sickle
head. Insert sickle head pin in sickle head to
shield bearing from dirt and replace grease
fitting if removed.
4. 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.
Sickle Head Needle Bearing Installation
Using a flat-ended tool (C) with approximately the
same diameter as the bearing, push the bearing
into the sickle head until the top of the bearing is
flush with the step (D) in sickle head.
IMPORTANT: O-ring and plug must be in place in
sickle head before installing bearing. Assemble the
bearing with the stamped end (the end with
identification markings) against the tool.
Install seal (E) in top of sickle head with lip facing
outwards.
IMPORTANT: To avoid premature sickle head or
wobble box failure, be sure there is no looseness in:
a) Fit of sickle head pin and needle bearing.
b) Fit of sickle head pin and pitman arm.
REMOVING SICKLE
B
A
NEEDLE BEARING INSTALLATION
C
D
E