Husqvarna PT-26D Operator's Manual page 116

Lubrication
3. Cutting unit's bevel gear
Sight glass on the plug on the front of the bevel gear.
Check the level when the cutting unit is in the lower
position. When filling, raise the cutting unit to the
transport position and remove the plug with the sight
glass.
Fill with transmission oil SAE 80.
Changing the oil
Drain the bevel gear through the sight glass with a
suction hose equipped with a plastic hose, which
reaches the bottom of the housing.
Alternatively; remove the cutting unit and plastic
covers. Place the cutting unit on its top edge and drain
the bevel gear through a plug.
4. Propeller shaft's joints
The propeller shaft joint's 2 nipples, one nipple on the
front and rear joint. Remove the propeller shaft (See
"Side shifting the cutting unit" on page 97.) and
lubricate using a grease gun until grease is forced out.
Also lubricate the telescopic joint on the propeller shaft
with grease.
114
Cutting unit's bevel gear
Propeller shaft's joints
8009-773
8009-775