Husqvarna 572XPG Operator's Manual page 29

To do a check of the rim sprocket
The clutch drum has a rim sprocket that can be
replaced.
1. Make sure that the rim sprocket is not worn. Replace
if necessary.
2. Replace the rim sprocket each time 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. Remove the clutch drum and lubricate the needle
bearing with a grease gun. Use engine oil or a
bearing grease of high quality.
140 - 003 -
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.
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.
To do a check of the guide bar
1. Make sure that the oil channel is not blocked. Clean
if it is necessary.
2. Examine if there are burrs on the edges of the guide
bar. Remove the burrs using a file.
3. Clean the groove in the guide bar.
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