Replacing The Cutting Unit Belts; Checking The Blades; Replacing The Blades; Removing The Bioclip Plug - Husqvarna P 520D Operator's Manual

Replacing the cutting unit belts

WARNING! Protect your hands with gloves
!
There is a risk of crush injuries when
working with the belt.
On these cutting units with collision-proof blades, the blades
are driven by one V-belt. Do as follows to change the V-belt:
1 Remove the screws holding the belt covers and lift them
off.
2 Use the service strut to relieve the spring and release the
belt tension.
3 Prise the belt off the pulleys.
4 Fit the belt around the pulleys. The belt tightening
schedule is on a decal located on the cutting unit under
the belt cover.
5 Fit covers.

Checking the blades

To achieve the best mowing results it is important that the
blades are undamaged and well-sharpened.
Check that the blades' attachment screws are tight. Screws
should be torque tightened to 84 Nm.
IMPORTANT! One or more unbalanced blades , caused by
damage or poor balancing after sharpening, can cause
vibrations in the machine.
The blades should be balanced after sharpening.
Damaged blades should be replaced when hitting obstacles
that result in a breakdown.

Replacing the blades

• Put the unit in the service position, see Placing in the
service position.
• Remove the equipment frame.
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MAINTENANCE AND SERVICE
• Lock the blade with a wooden block. Loosen the blade bolt
and remove the blade bolt, the washers and the blade.
• Assemble the parts in the reverse order.
• The blade must be mounted with the angled ends pointing
up towards the cover.
• Tightening torque 80-84 Nm (8,15-8,56 kpm/59-62 lbft).
18mm
WARNING! Wear gloves to protect your
!
hands when working with the blades.
IMPORTANT! Always exercise care and use your common
sense. Avoid all situations which you consider to be beyond
your capability. If you still feel uncertain about operating
procedures after reading these instructions, you should
consult an expert before continuing. Contact an authorised
service workshop.
Always use genuine parts. For more information, see the
"Technical data" section.

Removing the BioClip plug

To change a Combi unit from BioClip function to cutting unit
with rear ejection, remove the BioClip plug located under the
unit with three screws.
1 Put the unit in the service position, see Placing in the
service position.
2 Remove the three screws holding the BioClip plug, and
remove the plug.
3 Tip: Fit three full-thread screws M8x15 mm in the screw
holes to protect the threads.
4 Replace the unit in normal position.
Fit the BioClip plug in the reverse order.