Servicing the Guide Bar,
Chain, and Drive Sprocket
Yearly or before storage
DANGER
Contact with the chain saw teeth can cause
serious personal injury.
•
Remove the battery pack before adjusting
or maintaining the chain saw.
•
Always wear gloves when adjusting or
maintaining the chain saw.
1.
Place the chain saw on a flat surface and
remove the battery pack; refer to
Battery Pack (page 16)
.
2.
Remove the side cover by loosening the 2
captive nuts that secure the cover (
).
Note:
The captive nuts do not separate from
the side cover; loosen them until the cover can
be removed.
g315844
Figure 28
1.
Cover
3.
Chain tensioning screw
2.
Captive nut
4.
Multitool
3.
Loosen the chain by turning the chain-tightening
screw counterclockwise (
).
4.
Separate the chain from the guide bar and set
them aside.
5.
Remove the clip and drive sprocket from the
chain saw (
6.
Clean any debris from the area under the side
cover.
7.
Inspect the drive sprocket; if it is excessively
worn or damaged, replace it.
8.
Install the drive sprocket and clip.
9.
Check the oil outlet (
) for debris and
clean the area if necessary.
g315855
Figure 29
1.
Drive sprocket
3.
Oil outlet
2.
Clip
10.
Clean the guide bar and chain; use a wire or a
small flat-head screwdriver to remove dirt and
debris from the groove along the edge of the
guide bar, starting from the sprocket on the front
end and moving rearward.
Ensure that the oil channel in the bar that aligns
with the oil outlet on the chain saw is clean so
that oil can flow freely to the chain (
g315856
Figure 30
Internal sections of the guide bar shown
1.
Ensure that this channel
connecting to the oil outlet
is clean.
2.
Ensure that the bar
sprocket is clean and
rotates freely.
11.
Inspect the guide bar and chain; if the bar
is bent, the grooves are damaged, or if the
sprocket on the front end does not rotate freely,
replace the guide bar; if the chain is excessively
worn or damaged, replace it.
12.
Install the guide bar and chain; refer to
the Guide Bar and Chain (page 21)
.
13.
Ensure that oil is flowing to the chain; refer to
Checking the Flow of Bar and Chain Oil (page
18)
.
20
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