Troubleshooting; Troubleshooting Schedule - Husqvarna 120i Manuel D'utilisation

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. 123)
Note: Turn the wheel down (+) for more tension and
up (-) for less tension. The saw chain is tightened
correctly when you can turn is easily by hand but is
tight against the guide bar.
4. Turn the knob clockwise to tighten the bar knob.
(Fig. 124)
5. Fold down the knob to lock the tension. (Fig. 125)
To do a check of the saw chain
lubrication
Do a check of the saw chain lubrication each third
battery charge.
1. Start the product and let it run at 3/4 power. Hold the
bar approximately 20 cm (8 inches) above a light
coloured surface.
2. If the saw chain lubrication is correct, you will see a
clear line of oil on the surface after 1 minute. (Fig.
126)
3. If the saw chain lubrication is not correct, do the
following checks.
a) Do a check of the oil channel in the guide bar to
make sure that it is not blocked. Clean if
necessary. (Fig. 127)
b) Do a check of the groove in the edge of the guide
bar to make sure that it is clean. Clean if
necessary. (Fig. 128)
c) Make sure that the bar tip sprocket turns freely
and that the lubricating hole in the guide bar tip
sprocket is not blocked. Clean and lubricate if
necessary. (Fig. 129)
4. If the saw chain lubrication does not work after
following the steps above, speak to your servicing
dealer.
To do the maintenance on the chain
drive sprocket
The drive system has a drive sprocket.

Troubleshooting schedule

Table 1: Keypad
Possible fault codes on the keypad of the product.
1259 - 002 - 15.07.2020
(Fig. 130)
Do the following maintenance on the chain drive
sprocket:
1. Regularly do a check of the degree of wear on the
drive sprocket. Replace the chain drive sprocket if
there is too much wear.
2. Replace the drive sprocket when you replace the
saw chain.
To examine the cutting equipment
1. Make sure that there are no cracks in rivets and links
and that no rivets are loose. Replace if it is
necessary. (Fig. 131)
2. Make sure that the saw chain is easy to bend.
Replace the saw chain if it is rigid.
3. Compare the saw chain with a new saw chain to
examine if the rivets and links are worn.
4. Replace the saw chain when the longest part of the
cutting tooth is less than 4 mm/0.16 in. Also replace
the saw chain if there are cracks on the cutters. (Fig.
132)
To do a check of the guide bar
1. Make sure that the oil channel is not blocked. Clean
if it is necessary. (Fig. 127)
2. Examine if there are burrs on the edges of the guide
bar. Remove the burrs using a file. (Fig. 133)
3. Clean the groove in the guide bar. (Fig. 128)
4. Examine the groove in the guide bar for wear.
Replace the guide bar if it is necessary. (Fig. 134)
5. Examine if the guide bar tip is rough or very worn.
(Fig. 135)
6. Make sure that the bar tip sprocket turns freely and
that the lubricating hole in the bar tip sprocket is not
blocked. Clean and lubricate if it is necessary. (Fig.
129)
7. Turn the guide bar daily to extend its life cycle. (Fig.
136)

Troubleshooting

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