23
FIG. 28
FIG. 29
9. OPERATION AND USE
9.13 CHAIN LUBRICATION - FIG. 28
Prior to use check for chain oil distribution on a
piece of paper or cut timber. Observe spatter before
continuing.
If the chain is not sufficiently lubricated, check the
oil tank level and/or increase the oil flow by rotating
the setting screw
anti-clockwise. If problem
persists, stop engine and when cooled clean sawdust
from behind clutch cover and clean bar groove.
9.14 SHARPENING - FIG. 29
Sawdust instead of chips is an indication that the saw
chain needs sharpening, or replacing.
Before sharpening, the chain must be made taught
by means of the chain tensioner.
After sharpening, slacken and adjust the chain as per
the mounting instructions.
During sharpening, lock the chain using the brake.
Use a round file specific for the chain fitted. Observe
the sharpening angle (Fig.29 parts 2,3,5,7,8).
Sharpen by filing from the inside outwards (Fig.29
part 9) all the teeth on one side and then all the
teeth on the other.
Position the file to project 20% of its diameter above
the cutter (Fig.29 part 6).
Make sure every cutter is filed to the same length and
angle, and that all depth gauge links are the same
height (Fig.28 part 1).
Inconsistant angles can result in a poor cut or
endanger the user. Seek advice from a professional if
unsure.
91VG .025" (0.64mm)
Cutter length
Filing angle
Side plate angle
Top plate cutting angle
30°
90°
1/5
85°
60°
30°
Depth gauge
standard
Inside
Outside
1)
2)
3)
4)
5)
6)
7)
8)
9)