Husqvarna PT 26D Operator's Manual page 124

8. Hydraulic oil filter, change
Hydraulic oil filters should be changed by an
authorised Husqvarna workshop.
9. Cutting unit mounting
Lubricate ball joints and shafts with the oil can.
10. Lifting arm's rear bearings
2 nipples, one on each side. Lubricate using a grease
gun until grease is forced out.
Cutting unit mounting
Rear storage bearing
Lubrication
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