16
on the workpiece when the feed rate control valve is
fully open.
1. Raise the saw arm to its full upright position and
lock it in position (refer to Figure 18).
2. To adjust the tension on the spring, loosen the
two nuts on the threaded rod of the spring pivot
post. Adjust the tension as required.
3. Tighten the two nuts against the pivot post.
4. The saw can now be returned to service.
Replacing the Drive Wheel
1. Remove the blade (see
Changing Blades
).
2. Remove the screw, spring washer, and washer
from the speed reducer shaft.
3. Pull the wheel from the speed reducer shaft.
Remove the drive key from the speed reducer
shaft.
4. Inspection: Examine drive edge and shoulder of
the wheel for damage. Replace the wheel if
damaged.
5. Install the key in the keyway in the speed reducer
shaft. Align the keyway in the wheel with the key
in the speed reducer shaft. Reinstall the wheel on
the speed reducer shaft.
6. Install the screw, spring washer and washer in the
end of the speed reducer shaft.
7. Install the blade (see
Changing Blades
).
Replacing Idler Wheel or
Idler Bearing
1. Remove the saw blade (see
Changing Blades
).
2. Remove the screw, spring washer, and washer
from the idler shaft.
3. Remove the idler wheel. Remove the bearing from
the idler wheel.
4. Inspection: Examine the drive edge and shoulder
of the idler wheel for damage. Replace the wheel
if damaged.
5. Inspect bearings for damage and smooth opera-
tion, Replace if faulty.
6. Install the bearing in the idler wheel. Install the
idler wheel on the idler shaft.
7. Install the screw, spring washer and washer in the
idler shaft.
8. Install the blade (see
Changing blades
).
Adjusting the Blade Guides
The cut-off saw has adjustable blade guide supports
(see figure 19). The blade guide supports allow you to
set the blade guides for varying widths of workpieces.
To make accurate cuts and prolong blade life, the
blade guide supports should be set to just clear the
workpiece to be cut.
1. Loosen the knob on the blade guide support and
slide the guide left or right as required. Repeat for
the other blade guide.
2. Set the blade guide supports as required to
accommodate the width/diameter of the
workpiece. The blade guides should be positioned
so the guides do not contact the workpiece as the
saw head moves downward through the workpiece.
Replacement of Carbide
Blade Guide
(see figure 20)
Figure 19: Blade guide supports
Blade
Guide
Supports
Concentric Bushing
Eccentric
Bushing
Blade Guide Bearings
Cap Screw
(Typical)
Carbide
Guides (2)
Cap Screw
(Typical)
Figure 20: Carbide blade guides
and guide bearings
Figure 18: Counterblance Spring
Adjustment
45¢X
40¢X
35¢X
35¢X
30¢X
25¢X
Counterblance
Spring
Hex Nut (2)
(to adjust
tension)
