15
that they straddle the work, severe damage to
the workpiece and to the blade can result.
1. Disconnect machine from power source.
2. Raise bow to vertical position, and secure in
place by turning off hydraulic cylinder.
3. Remove red blade guard (A, Figure 19) by
removing two screws.
Red blade guard must be
reinstalled after new blade is fitted.
Figure 19
4. Remove brush assembly (B, Figure 19) by
removing two screws.
5. Loosen blade tension by turning handle (C,
Figure 20) counterclockwise.
Figure 20
6. Open back cover by loosening two lock
knobs (D, Figure 20).
7. Carefully remove old blade.
NOTE: Leather
gloves are recommended when handling
saw blades.
8. Install new blade first between bearing
guides. Make sure blade teeth face same
direction as shown on the blade direction
label on saw. (If teeth still point in wrong
direction despite mounting blade properly,
the blade has been turned inside-out. Twist
blade right side-out and reinstall.)
9. Position blade around wheels, making sure
it rests near the flange on both wheels.
10. Tension blade using handle. Do not over-
tension. See
section 9.8,
Blade tension
.
11. Close back cover and secure with knobs.
12. Install red blade guard, and brush assembly.
13. Connect machine to power source.
14. Run machine to verify that blade is tracking
properly. See
section 9.9,
Blade tracking
.
9.8
Blade tension
Disconnect machine from
power source, and use caution when
working with sharp blade.
Blade tension is vital to achieving proper results
from the band saw. For shipping purposes, the
blade may not be at full tension – verify tension
before operating.
Proper blade tension is 1550 to 1760 kg/cm
2
(22000-25000 lb/in
2
) as measured on a blade
tension gauge (not provided).
To set tension without the use of a tension
gauge:
1. Disconnect machine from power source.
2. Install blade between wheels and between
bearings on blade guides.
3. Lightly tension blade to remove any sag by
turning handle (C, Figure 20) slightly
clockwise.
4. Turn tension handle (C, Figure 20) 1-3/4 to
two revolutions clockwise.
Do not overtighten blade;
this may cause it to stretch or warp.
5. Close covers, connect to power source, and
run saw for 2 to 3 minutes to allow blade to
seat properly.
6. Disconnect machine from power source.
Open cover and loosen blade until it just
begins to sag.
7. Tighten blade until it straightens between
blade wheels and all sag is eliminated.
8. Tighten blade by turning handle (C, Figure
20) two full revolutions.
Do not overtighten blade;
this may cause it to stretch or warp.
TIP:
Slacken blade tension when finished with
operations, to prolong blade life. Make note of
indicator position on tension label (E, Figure 20)