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-34-
For Machines Mfg. Since 8/09
Model SB1021/SB1022
MAINTENANCE
V-Belts
To ensure optimum power transfer from the
motor to the blade, the V-belts must be in good
condition and operate under proper tension.
Check V-belt tension at least every three
months—more often if the bandsaw is used daily.
V-belts stretch with use and must be periodically
re-tensioned. Replace the V-belts if they are
cracked, frayed, or badly worn. Refer to Figure
38 to identify V-belt locations.
Dressing Rubber Tires
As the bandsaw ages, the rubber tires on the
wheel may need to be redressed if they become
hardened or glazed over. Dressing the rubber
tires improves blade tracking and reduces
vibration/blade lead.
If the rubber tires become too worn, then blade
tracking will become extremely difficult. At that
point, redressing will no longer be effective, and
the rubber tires must be replaced.
To redress the rubber tires:
1. DISCONNECT BANDSAW FROM POWER!
2. Put on heavy gloves and remove the blade.
3. Use a brush and shop vacuum to clean any
chips from the rubber tires.
4. Hold a piece of 100-grit sandpaper against
the rubber tire and rotate the wheel by hand.
Only redress the rubber enough to expose a
fresh rubber surface.
a. Check surface area of tire to ensure a
uniformly sanded surface.
Figure 38. System belt and pulley layout.
Air Pump
Sprocket Drive
Pulley
Left/Right Speed
Pulley Belts
Sprocket
Drive Belt
Tensioner
!
Intermediate
Pulley
Note: When the machine is started, the belts will
automatically adjust to the correct tension.
Sprocket Drive Belt
Use a 17mm wrench and loosen the tensioner hex
bolt. Next use a 6mm hex wrench to loosen the
three intermediate pulley retaining cap screws so
the belt is loose. Replace the sprocket drive belt.
Re-tighten the intermediate hub and adjust the
tensioner hub to tension the new belt.
Air Pump Belt
Use a 10mm wrench to loosen the pump
mounting bolts, replace the belt and tension it
by positioning the air pump, then tighten the
mounting bolts.
Note: Make sure that when tightened, the pump
pulley is aligned with the motor drive pulley.
To check/tension/replace the V-belts:
1. DISCONNECT BANDSAW FROM POWER!
2. Remove the rear motor access panel.
3. Push the center of each V-belt with moderate
force. When tensioned correctly, there should
be approximately
3
⁄16" of deflection. DO NOT
overtighten the belts or the bearings will
wear prematurely.
Speed Hub Belts
Rotate the speed handle left or right until the
belts are loose. Roll the belts off the pulleys to
replace them. (If you get them mixed up when
replacing, the belt on the left is the larger of the
two.)