Husqvarna DT18BF Operator's Manual page 27

LUBRICATIoN
Blades
Cover the blades with a thin coat of oil to avoid rust.
This is particularly important prior to winter storage or
if the machine will not be used for a period of longer
than 30 days.
Handle
Lubricate the joints at both sides of the handle with an
oil can.
DT06
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