LawnMaster CLPS4008 Operator's Manual page 30

CARE AND MAINTENANCE
- File angle
- Cutting angle
- File position
- Diameter of round file
- File depth
● To sharpen the chain proceed as follows:
- Use protective gloves.
- Ensure the chain is correctly tensioned.
- Engage the chain brake to lock the chain
on the bar.
● Use a chain file, whose diameter is 1.1
times the cutting tooth depth. Make sure
20 % of the file diameter is above the cutter's
top plate.
NOTE: A file guide is available from most reputable tool merchants and is the easiest way to hold
the file at the correct position.
● File at an angle perpendicular to the bar, and at an angle of 25° to the direction of travel (Fig. 45).
● File each tooth from the inside towards outside only. File one side of the chain first than turn the
saw around and repeat the process.
● Sharpen each tooth equally by using the same number of strokes.
● Keep all cutter lengths equal. Check the safety depth gauge height every 5 sharpenings. If the
depth gauges are also trimmed it is essential that the original profile be restored.
● Use a depth gauge measuring instrument to check the height of the depth gauge. Depth gauge
measuring jigs are available from most reputable tool merchants (Fig. 46).
Sharpening angle
Left-hand
cutter
25°
File
direction
Outside
Inside
Chain direction
Fig. 45
Left-hand
Right-hand
cutter
Bumper
drive link
Tie
strap
Cutting tip
File position
Top plate
Cutter
length
Depth gauge
30
cutter
Bumper tie
strap
Chain
direction
Fig. 44
Depth gauge
setting 0.025"
Fig. 46