24
24
Lubrication
Periodically apply light dabs of grease to front and rear
trunnions (Figure 26) where parts slide against one
another.
Figure 26
Bearings in the drive mechanism are pre-lubricated
and sealed; no further attention is needed for these.
Fuse Inspection
The scroll saw is equipped with a 3.15-amp fuse for
overload protection. If the saw stops working, inspect
fuse:
1. Unscrew fuse cap (Figure 27) and pull fuse out of
cap.
2. If fuse has blown, replace it.
3. Install new fuse into cap, then screw cap into
hole.
Figure 27
Commutator Brush Inspection
To maintain motor efficiency, inspect the two carbon
brushes every two months, or more frequently if saw
is heavily used. Stalling or loss of power may be a
symptom of worn carbon brushes. If one brush is worn
out, replace both at the same time.
Continued use of a damaged or
worn brush may result in damage to motor
armature.
1. Unplug saw from power source.
2. Unscrew and remove cap with flat blade
screwdriver. See Figure 28.
3. Gently pry up an edge of the brass clip, until the
spring causes it to disengage from hole. (Notice
orientation of brush as you remove it; it should be
inserted in the same manner; curvature of brush
will match curvature of motor.)
4. Pull out brush and inspect. Brush should be
replaced if any of the following are discovered:
•
Brush has worn to about 1/2-inch long.
•
Signs of crumbling, burning, or breaking.
•
End of brush is rough or pitted.
•
Abnormal coloration of spring
•
Broken lead in spring
•
Collapsed spring
5. Install new brush (or reinstall current brush) and
gently press it all the way into hole until the brass
clip is secured.
6. Install cap.
7. Repeat for other brush.
NOTE: It is recommended that saw be run without
load for several minutes to seat new brushes.
Figure 28
