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13
Fig. 22
Fig. 23
Fig. 24
ADJUSTING UPPER BLADE GUIDES
AND BLADE SUPPORT BEARING
The blade guides must be properly adjusted to prevent the blade from twisting during operation. The upper blade
guides and blade support bearings should be adjusted only after the blade is tensioned and tracking properly. To
adjust, proceed as follows:
1. DISCONNECT MACHINE FROM POWER SOURCE.
2. Remove two screws (A) Fig. 22, and remove blade
guard (B) from guide assembly.
3. The upper blade guides (C) Fig. 23, are held in place
by means of the screws (D). Loosen screws (D) to move
the guides (C) as close as possible to the sides of the
blade, being careful not to pinch the blade between the
guides. Then tighten the screws (D).
4. The guides (C) Fig. 23, should then be adjusted so
that the front edge of the guides are just behind the
“gullets” of the blade teeth. The complete guide block
bracket (E) Fig. 24, can be moved in or out by loosening
screw (F) Fig. 24 and moving shaft (G) Fig. 24 in or out
as desired. When guides (C) Fig. 23 are set properly,
tighten screw (F) Fig. 24.
5. The upper blade support bearing (H) Fig. 24,
supports the back of the blade during the cutting
operation and also prevents the blade from being
pushed too far to the rear, which could damage the set
in the blade teeth. The support bearing (H) should be set
about 1/64 behind the blade by loosening screw (J) and
moving shaft (K) in or out. Then tighten screw (J).
6. The upper blade support bearing (H) Fig. 24, should
also be adjusted so the back edge of the blade overlaps
the outside diameter of the ball bearing by approxi-
mately 1/8 . The bearing shaft (K) is on an eccentric and
to change bearing position, loosen screw (J) and rotate
shaft (K) until correct adjustment is made. Then tighten
screw (J).
7. MAKE CERTAIN TO REPLACE BLADE GUARD
THAT WAS REMOVED IN STEP 2.
B
A
C
C
D
D
H
K
G
F
J
E
C