Husqvarna 420 EL Operator's Manual page 29

• Filing angle.
(Fig. 98)
• Cutting angle.
(Fig. 99)
• File position.
(Fig. 100)
• Round file diameter.
(Fig. 101)
It is not easy to sharpen a saw chain correctly without
the correct equipment. Use Husqvarna file gauge. This
will help you to keep maximum cutting performance and
the kickback risk at a minimum.
WARNING:
increases a lot if you do not follow the
sharpening instructions.
Note:
To sharpen the cutters on page 29 for
Refer to
information about sharpening of the saw chain.
To sharpen the cutters
1. Use a round file and a file gauge to sharpen the
cutting teeth. (Fig. 102)
Note:
Accessories on page 32
Refer to
for information about which file and gauge that
Husqvarna recommends for your saw chain.
2. Apply the file gauge correctly on to the cutter. Refer
to the instruction supplied with the file gauge.
3. Move the file from the inner side of the cutting teeth
and out. Decrease the pressure on the pull stroke.
(Fig. 103)
4. Remove material from one side of all the cutting
teeth.
5. Turn the product around and remove material on the
other side.
6. Make sure that all cutting teeth are the same length.
General information about how to adjust the
depth gauge setting
The depth gauge setting (C) decreases when you
sharpen the cutting tooth (A). To keep maximum
cutting performance you must remove filing material
from the depth gauge (B) to receive the recommended
depth gauge setting. See
for instructions about how to receive the correct depth
gauge setting for your saw chain.
(Fig. 104)
WARNING:
increases if the depth gauge setting is too
large!
1782 - 001 - 03.02.2022
The force of the kickback
Accessories on page 32
The risk of kickback
To adjust the depth gauge setting
Before you adjust the depth gauge setting or sharpen
To sharpen the cutters on page
the cutters, refer to
29 , for instructions. We recommend you to adjust the
depth gauge setting after each third operation that you
sharpen the cutting teeth.
We recommend that you use our depth gauge tool to
receive the correct depth gauge setting and bevel for the
depth gauge.
(Fig. 105)
1. Use a flat file and a depth gauge tool to adjust
the depth gauge setting. Only use Husqvarna depth
gauge tool to get the correct depth gauge setting and
bevel for the depth gauge.
2. Put the depth gauge tool on the saw chain.
Note:
See the package of the depth gauge tool for
more information about how to use the tool.
3. Use the flat file to remove the part of the depth
gauge that extends through the depth gauge tool.
(Fig. 106)
To adjust the tension of the saw chain
WARNING:
incorrect tension can come loose from the
guide bar and cause serious injury or death.
A saw chain becomes longer when you use it. Adjust
the saw chain regularly. Do a check of the saw chain
tension each time you fill with chain oil.
Note:
A new saw chain has a run-in period during
which you must do a check of the tension more
frequently.
To adjust the tension of the saw chain (420
EL)
1. Fold the knob out until it opens. (Fig. 107)
2. Turn the knob counterclockwise to loosen the drive
sprocket cover. (Fig. 108)
3. Turn the chain tensioner wheel to adjust the tension
on the saw chain. The saw chain must be tight
against the guide bar. (Fig. 109)
Note:
Turn the wheel down (+) for more tension
and up (-) for less tension.
4. Make sure that you can pull the saw chain around
freely by hand and that it does not hang from the
guide bar. (Fig. 110)
5. Turn the knob clockwise to tighten the bar knob.
(Fig. 111)
6. Fold down the knob to lock the tension. (Fig. 112)
A saw chain with an
29