SB 0855 Page 3 of 3
ASSEMBLY
When installing a new knife drive box or whenever a drive arm or pulley is being installed follow the instructions
below.
Knife Drive Box (Wobble Box) Assembly
1. Ensure splines and bores in pulley or drive arm are free of
paint oil and solvents.
2. Apply 2 bands of Loctite® 243 on pulley shaft as shown at
(
C
).
3. Push pulley on until flush with end of shaft and insert 5/8” X
3” hex head bolt with distorted thread NC locknut and
torque to 160 ft-lbs (Nm).
4. Place box into position on header mount, placing belt
around pulley and install 5/8” X 1.5” grade 8 hex head bolts
to mount wobble box to frame. Tighten the 4 bolts gradually
until tight. Torque
side bolts first
to 200 ft-lbs. and then
bolts through the bottom.
5. Apply Loctite® 243 to the output shaft in 2 bands as shown
at (
C
) and slide arm onto shaft. Rotate pulley to ensure
drive arm just clears frame to ensure proper placement on
splines.
6. Position drive arm at furthest outboard position. Move drive
arm up or down on splined shaft until it just contacts the
knife head at (
A
). A 0.25mm or .010” gap is desirable while
making sure knife is laying flat on ledger surface of first few
guards. Torque 5/8” X 3” hex head bolt to 160 ft-lbs. at (
B
)
to secure arm on spline.
7. Install knife head pin and align groove in knife head pin just
above top of casting. Install 5/8” X 3” hex head bolt and
torque to 160 ft-lbs.
8. Grease knife head just enough to start a slight downward
movement of knife head. Over greasing will cause knife to
heat at guards and cause undue loading.