MacDon 742 HAY CONDITIONER - Manual (Page 62)

Form # 46290 Issue 09/05 60
MAINTENANCE/SERVICE
SICKLE AND SICKLE DRIVE (continued)
Sickle Sections
Check daily that sections are firmly bolted to the
sickle back and are not worn or broken. Replace
as required.
To replace sickle section:
1. Grasp the sickle drive belt and turn the sickle
drive until sections (A) are centered in the
guard as shown.
2. Remove the guard (and hold-down if present)
at the section to be replaced.
3. Remove lock nuts securing the section and lift
section off of bolts.
IMPORTANT: Do not mix heavy and light
sickle sections on same sickle.
4. Clean any dirt off of sickle back and position
new sickle section on bolts. Secure with lock
nuts.
5. Reinstall any guards and hold-downs removed.
Adjust sickle hold-downs as required. See
“Sickle Hold-Downs in this section.
NOTE: First four guards at knife head do not
have rear support bar and must be properly
positioned.
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.
For double drive sickles, remove top guide from
left-hand sickle and pull sickle out from both ends.
BOLT-ON SECTIONS
A
REMOVING SICKLE
B
A