Jet HVBS-56V, Operating Instructions Manual

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15
9.0 User-maintenance
Always disconnect power to
the machine before performing maintenance.
Failure to do this may result in serious personal
injury.
9.1 General maintenance
Wipe down saw with a soft rag after each use, and
clear metal particles with a small paint brush or parts
cleaning brush. Do not use compressed air, as it
may force chips into guide bearings and other
critical areas of saw.
Periodically apply a light coat of oil, such as SAE30,
on exposed metal surfaces to inhibit rust.
Make frequent inspections of motor fan, and blow
out (with low pressure air hose) or vacuum any
accumulation of foreign material to maintain normal
motor ventilation.
Keep blade guides clean and free of metal particles.
Check guide bearings frequently to make sure that
they are properly adjusted and turning freely.
Inspect power cord; if worn, cut or damaged in any
way, have it replaced immediately.
9.2 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. Remove four button head screws, and remove
motor sleeve.
3. Unscrew and remove cap with flat blade
screwdriver. See Figure 9-1.
4. 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.)
5. 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, breaking.
•
End of brush is rough or pitted.
•
Abnormal coloration of spring
•
Broken lead in spring
•
Collapsed spring
6. Install new brush (or reinstall current brush) and
gently press it all the way into hole until brass
clip is secured.
7. Install cap.
8. Repeat for other brush.
9. Reinstall motor sleeve and screws.
NOTE: It is recommended that saw be run without
load for several minutes to seat new brushes.
Figure 9-1
9.3 Lubrication
Ball bearings on blade guide assemblies and blade
wheels are permanently lubricated and sealed, and
should require no further lubrication.
Lubricate the vise lead screw as needed with #2
tube grease.
9.4 Additional servicing
Any additional servicing on the band saw should be
performed by an authorized service representative.