CHECKING, ADJUSTING AND REPLACING KNIVES
1.When checking, adjusting or replacing the cutter- head knives on the planer, proceed as follows:
A.
DISCONNECT MACHINE FROM POWER SOURCE
B.Remove the top cover of the planer exposing the cutterhead.
C.Check all four knives for proper setting using the knife guage (A), as shown in Fig. 20. When the guage (A) is placed on the cutterhead and the bot- tom of the two roll pins, one of which is shown at (B), are against the edge of the slot (C) opposite the knife, the knife should just contact the bottom of the guage (D).
D.If any of the knives require an adjustment, slightly loosen the knife locking bar of each of the four knives by turning the knife locking screws (E) Fig. 20, into the locking bar just enough to relieve stress in the cutterhead but not disturb the setting of the four knives.
E.To adjust the knife that must be reset, loosen all of that knife's locking screws (E) Fig. 20, by turning them into the locking bar. As the knife locking bar becomes loose, lifter springs under the knife will raise the knife until it contacts the bottom of the guage (D). Then snug up the knife locking bar by lightly backing out the locking screws (E) against the knife slot. IMPORTANT: AT THIS TIME, ONLY TIGHTEN THE KNIFE INTO THE SLOT ENOUGH TO HOLD IT IN POSITION.
F.If additional knives must be reset, repeat STEP C.
G.After all four knives are set with the screws just snug, back out and tighten the locking screws, five of which are shown at (E) Fig. 20, against the slot. Start with the end screws first and proceed on alter- nate sides toward the center screws until the knife is securely held in the cutterhead. Tighten the remain- ing three knives in the same manner.
2.
IF THE KNIVES ARE TO BE REMOVED FOR SHARPENING OR REPLACEMENT, EXTREME CARE SHOULD BE TAKEN AS THE KNIVES ARE VERY SHARP. TO REMOVE THE KNIVES, WEAR GLOVES AND PROCEED AS FOL- LOWS:
A.
DISCONNECT MACHINE FROM POWER SOURCE
E
B
C 
A
E
D
Fig. 20
B.To remove each knife, loosen the knife locking bar, by turning the locking screws, five of which are shown at (E) Fig. 20, into the knife locking bar and remove the locking bar, knife and springs located under the knife.
C.Remove the remaining three knives in the same manner.
D.Thoroughly clean the knife slots, knife bars, springs and screws. If the threads appear worn or stripped or if the heads are becoming rounded, replace them.
E.Inspect the cutting edge of the knives for nicks or wire edge. Hone the knives slightly using a stone or if the knives are to be sharpened, maintain a cutting angle of 40 degrees.
F.Insert springs, knives and knife locking bars into all four slots in the cutterhead. Push knives down as far as possible and back out locking screws, five of which are shown at (E) Fig. 20, just enough to hold all four knives in the cutterhead.
G.Adjust all four knives as explained in Step 1.
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