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To set or replace knives:
1.
DISCONNECT MACHINE FROM POWER!
2.
Remove cutterhead guard from table and
lower infeed and outfeed tables as far as they
go. This will provide unrestricted access to
cutterhead.
3.
Remove cabinet rear access panel to expose
cutterhead pulley.
4.
Rotate cutterhead pulley to provide good
access to cutterhead knives, and put on
leather gloves.
5.
5.
5.
Loosen cutterhead gib bolts, starting in the
Loosen cutterhead gib bolts, starting in the
Loosen cutterhead gib bolts, starting in the
middle, and alternating back and forth until all
middle, and alternating back and forth until all
middle, and alternating back and forth until all
gib bolts are loose, but not falling out.
gib bolts are loose, but not falling out.
gib bolts are loose, but not falling out.
The first time you set or replace a knife,
The first time you set or replace a knife,
The first time you set or replace a knife,
The first time you set or replace a knife,
remove gib and knife from cutterhead. Clean
remove gib and knife from cutterhead. Clean
remove gib and knife from cutterhead. Clean
remove gib and knife from cutterhead. Clean
gib and clean inside cutterhead slot to remove
gib and clean inside cutterhead slot to remove
gib and clean inside cutterhead slot to remove
gib and clean inside cutterhead slot to remove
all pitch or sawdust. Coat knife and gib with a
all pitch or sawdust. Coat knife and gib with a
all pitch or sawdust. Coat knife and gib with a
all pitch or sawdust. Coat knife and gib with a
metal protectant.
metal protectant.
metal protectant.
metal protectant.
6.
6.
6.
Position knife jig over knife. Loosen gib bolts
Position knife jig over knife. Loosen gib bolts
Position knife jig over knife. Loosen gib bolts
until knife is completely loose.
until knife is completely loose.
until knife is completely loose.
7.
7.
7.
Access jack screws through holes in cutter-
Access jack screws through holes in cutter-
Access jack screws through holes in cutter-
head. Using a hex wrench, rotate jack screws
head. Using a hex wrench, rotate jack screws
head. Using a hex wrench, rotate jack screws
to raise or lower knife. When knife is set cor-
to raise or lower knife. When knife is set cor-
to raise or lower knife. When knife is set cor-
rectly, it will barely touch middle pad of knife
rectly, it will barely touch middle pad of knife
rectly, it will barely touch middle pad of knife
jig or bottom of straightedge in each of the
jig or bottom of straightedge in each of the
jig or bottom of straightedge in each of the
straightedge positions. Snug gib bolts just
straightedge positions. Snug gib bolts just
straightedge positions. Snug gib bolts just
tight enough to hold knife in place. Repeat
tight enough to hold knife in place. Repeat
tight enough to hold knife in place. Repeat
with remaining knives.
with remaining knives.
with remaining knives.
8.
8.
Rotate cutterhead to reveal the first knife
8.
Rotate cutterhead to reveal the first knife
Rotate cutterhead to reveal the first knife
you started with. Lightly snug all gib bolts,
you started with. Lightly snug all gib bolts,
you started with. Lightly snug all gib bolts,
alternating from one side to the other, and
alternating from one side to the other, and
alternating from one side to the other, and
working from the ends to the middle. Repeat
working from the ends to the middle. Repeat
working from the ends to the middle. Repeat
with remaining knives.
with remaining knives.
with remaining knives.
9.
9.
9.
Tighten each gib bolt in the same alternating
Tighten each gib bolt in the same alternating
Tighten each gib bolt in the same alternating
manner as you did in the previous step.
manner as you did in the previous step.
manner as you did in the previous step.
10. Make sure outfeed table is set even with the
10. Make sure outfeed table is set even with the
10. Make sure outfeed table is set even with the
new knives at top dead center.
new knives at top dead center.
new knives at top dead center.
Figure 63. Jack screw access hole.
11. Replace cutterhead guard and cabinet rear
11. Replace cutterhead guard and cabinet rear
11. Replace cutterhead guard and cabinet rear
access panel.
access panel.
access panel.
-40-
6.
Position knife jig over knife. Loosen gib bolts
straightedge positions. Snug gib bolts just
until knife is completely loose.
tight enough to hold knife in place. Repeat
with remaining knives.
7.
Access jack screws through holes in cutter-
head. Using a hex wrench, rotate jack screws
8.
Rotate cutterhead to reveal the first knife
to raise or lower knife. When knife is set cor-
you started with. Lightly snug all gib bolts,
rectly, it will barely touch middle pad of knife
alternating from one side to the other, and
jig or bottom of straightedge in each of the
working from the ends to the middle. Repeat
straightedge positions. Snug gib bolts just
with remaining knives.
tight enough to hold knife in place. Repeat
with remaining knives.
9.
Tighten each gib bolt in the same alternating
manner as you did in the previous step.
8.
Rotate cutterhead to reveal the first knife
you started with. Lightly snug all gib bolts,
10. Make sure outfeed table is set even with the
3
1
alternating from one side to the other, and
new knives at top dead center.
working from the ends to the middle. Repeat
with remaining knives.
Figure 64. Gib bolt tightening sequence.
11. Replace cutterhead guard and cabinet rear
access panel.
9.
Tighten each gib bolt in the same alternating
manner as you did in the previous step.
10. Make sure outfeed table is set even with the
new knives at top dead center.
11. Replace cutterhead guard and cabinet rear
access panel.
Model G0490W/G0490XW (Mfd. Since 5/16)
2
4
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