General 90-170B M1, Setup & Operation Manual, Page: 23 / 32

23
REPLACING THE BANDSAW BLADE
The blade should be replaced when worn out. Refer to the following symptoms to determine whether or not it is
time to replace the blade:
- It is not cutting as fast.
- It is not able to follow a cutting line as it used to.
REQUIRED MAINTENANCE
REPLACING THE UPPER AND LOWER BLADE GUIDES AND THRUST BEARINGS
8 . Use C-ring pliers H to remove the "C ring" I and slide
the thrust bearing off the shaft J .
ALWAYS DISCONNECT THE MACHINE FROM THE POWER SOURCE BEFORE PERFORMING ANY MAINTE-
NANCE.
6. Remove the thrust bearing mounting shaft E
7. Remove the blade guide mounting shaft G .
A
1. Turn off the bandsaw and unplug the power cord.
2. Release the blade tension by lifting handle A .
3. Using a 10 mm wrench, loosen but do not remove
the two bolts
B and remove the blade guard.
B
4. Using a 10 mm wrench, loosen bolt C and remove
the upper blade guides/thrust bearing assembly.
5. Loosen the upper thumb screw D and lower thumb
screw E .
C
D
E
F
G
9. Install a new bearing on the mounting shaft then re-install the C-ring.
10. Put the bearing and mounting shaft assembly back in place, and tighten the thumb screw.
11. Repeat steps 8 to 10 with the blade guide bearings.
12. Re-install the upper blade guides/thrust bearing assembly and blade-guard.
Repeat steps 5 to 10 with the lower guide bearings and thrust bearing.
Blade guides and thrust bearings should be verified each time the blade is replaced. Check if they turn well. If not,
the blade will get stuck or jammed between them and will wear
prematurely.