Husqvarna 3120XP Operator's Manual page 29

4. Tighten the saw chain until it is tight against the
guide bar but still can move easily.
5. Tighten the bar nuts using the wrench and lift the
front of the guide bar at the same time.
6. Make sure you can pull the saw chain around freely
by hand and that it does not hang from the guide
bar.
Product overview on page 2 for the
Note: Refer to
position of the chain tensioning screw on your product.
To do a check of the saw chain
lubrication
1. Start the product and let it operate at ¾ throttle. Hold
the bar approximately 20 cm/8 in above a surface of
light color.
2. If the saw chain lubrication is correct, you see a clear
line of oil on the surface after 1 minute.
3. If the saw chain lubrication does not operate
correctly, do a check of the guide bar. Refer to
a check of the guide bar on page 30 for
instructions. Speak to your servicing dealer if the
maintenance steps does not help.
To do a check of the chain drive
sprocket
The clutch drum has a spur sprocket (A) or a rim
sprocket (B). A spur sprocket has the chain sprocket
1527 - 001 - 25.06.2020
permanently attached to the clutch drum. A rim sprocket
can be replaced.
• Regularly examine the chain drive sprocket for wear.
Replace the chain drive sprocket if there is too much
wear.
• Replace the chain drive sprocket when you replace
the saw chain.
To lubricate the needle bearing
Note: Lubricate the needle bearing weekly.
1. Pull the front hand guard rearward to disengage the
chain brake.
2. Loosen the bar nuts and remove the clutch cover.
Note: Some models have only one bar nut.
3. Put the product on the side with the clutch up.
4. Use a grease gun to put engine oil in the center of
the clutch as it rotates.
To do
A B
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