SECTION 4 - MAINTENANCE
4-15
Installation
WARNING
Be very careful when installing a knife assembly.
Do not touch the sections if another person is
installing the knife assembly. If the end of the
knife hits, use a hammer handle or other tool to
force the knife to line up with the opening in the
guard.
Install the knife head bolt with head to the rear. Rotate
the conditioner rolls by hand to move the knife to the
center of its stroke. Then tighten knife head and
connecting rod bolts, 1 and 2, to 115 N
⋅
m (85 ft. lbs.).
IMPORTANT:
Check to be sure the knife back is
centered, front to back, in the opening in the guards,
3. If the knife back is too far forward or back, or the
outer section is too high or too low, refer to “Sickle
Drive Adjustment” in this section of the manual.
IMPORTANT:
Align the guards and adjust the knife
clips.
Remove and replace the right knife in the same way.
10004739
3
2
1
17
KNIFE HEAD
The knife head assembly attaches to the knife using
the same rivets or bolts that attach the knife sections
to the cutter bar. Refer to the “Replacing Knife
Sections” section
KNIFE HEAD BUSHING
The knife head bushing has rubber bonded between
steel bushings. Replace the bushing if the rubber is
loose or charred from heat.
Use a vise or press to remove the knife head bushing
as shown. Place a spacer, 1, with a 32 mm (1-1/4
″
)
outside diameter against the outer shell of the
bushing. (A 15/16
″
socket is about the right size.)
Center another spacer, 2, with an inside diameter of
at least 32 mm (1-1/4
″
) over the opposite side of the
bushing. A 50 mm (2
″
) long (1-1/4
″
pipe nipple is
about the correct size.) Use the vise or press to push
the bushing out of the knife head and into the larger
spacer.
Use the same spacers to install the new bushing. Be
sure to press against only the outer sleeve of the new
bushing. Press the bushing into the knife head until
the inner sleeve is centered from side to side.
2
1
18
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