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ENGLISH
MAINTENANCE AND STORAGE
Fig. 33
Depth Gauge
Top Plate
Fig. 34
Filing Angle
Fig. 35
Correct Filing Angles
Top Plate
Fig. 36
Depth Gauge Jointer
Flat File
Side Plate
Depth Gauge Clearance
1/32 inch (0.6 mm)
Right-Hand
Cutters
Left-Hand
Cutters
Side Plate
80º
30º
Fig. 33
Depth Gauge
Top Plate
Fig. 34
Filing Angle
Fig. 35
Correct Filing Angles
Top Plate
Fig. 36
Depth Gauge Jointer
Flat File
Side Plate
Depth Gauge Clearance
1/32 inch (0.6 mm)
Right-Hand
Cutters
Left-Hand
Cutters
Side Plate
80º
30º
Fig. 33
Depth Gauge
Top Plate
Fig. 34
Filing Angle
Fig. 35
Correct Filing Angles
Top Plate
Fig. 36
Depth Gauge Jointer
Flat File
Side Plate
Depth Gauge Clearance
1/32 inch (0.6 mm)
Right-Hand
Cutters
Left-Hand
Cutters
Side Plate
80º
30º
Fig. 33
Depth Gauge
Top Plate
Fig. 34
Filing Angle
Fig. 35
Correct Filing Angles
Top Plate
Fig. 36
Depth Gauge Jointer
Flat File
Side Plate
Depth Gauge Clearance
1/32 inch (0.6 mm)
Right-Hand
Cutters
Left-Hand
Cutters
Side Plate
80º
30º
Fig. 38
Fig. 39
Chain Oil
Discharge Hole
Guide Bar Groove
Oil Passage
Fig. 37
Restore original rounded shape
Fig. 40
Flat File
Uneven Wear
Bur
Spread Rails
Maintaining the Guide Bar
1. Inspect the guide bar frequently, at regular intervals
(for example, after every 5 hours of operation), to
ensure even wear on the top and bottom of the
guide bar. Refer to
Removing and Installing the
Guide Bar and Saw Chain
.
2. Clean the guide bar groove and oil passages
whenever the saw chain is removed, when the
unit has been used heavily or when the saw chain
appears dirty. Use a screwdriver, putty knife,
wire brush or similar instrument to remove debris
from the guide bar groove (Fig. 37). Use a small,
soft wire to remove any debris from the chain oil
discharge hole (Fig. 38).
If the oil passages are clear, the saw chain will give
off a spray of oil shortly after it begins to rotate during
operation.
NOTE
3. Frequently check the guide bar for damage
(Fig. 39). Feathering and burring of the guide bar
rails (the ridges on either side of the bar groove)
is a normal process of guide bar wear. Such faults
should be smoothed with a file as soon as they
occur (Fig. 39). A guide bar with the following faults
should be replaced:
a. Wear inside the guide bar rails that permits the
chain to lay sideways
b. Bent guide bar
c. Cracked or broken rails
d. Spread rails
Refer to
Replacing the Guide Bar and Saw Chain
.
Sharpening the Saw Chain Cont’d
Sharpening the Saw Chain Cont’d
e. File all the left-hand cutters in one direction
(Fig. 33). Then move to the other side of the
saw chain and file all of the right-hand cutters
in the opposite direction (Fig. 33).
f. Occasionally remove filings with a wire brush.
3. Use a depth gauge tool (not included) to measure
the depth gauge clearance (Fig. 35) of each cutter.
The depth gauge clearance must be maintained at
1/32 inch (0.6 mm). The depth gauge clearance
determines the depth at which the cutter enters
the wood during operation and the size of the wood
chips produced. Too much clearance increases the
chance of kickback. Too little clearance decreases
the size of the wood chips, thus deceasing the
ability to cut.
a. Use a 1/32 inch (0.6 mm) depth gauge jointer
and a flat file (tools not included) to lower the
depth gauge to the correct clearance (Fig. 35).
b. After lowering the depth gauge, use the flat
file to restore the original rounded shape to
the depth gauge (Fig. 36). Take care not to
damage the cutting edges or nearby links.
Fig. 32
Fig. 35
Fig. 36
Fig. 33
Fig. 34
