Husqvarna ProFlex 18 ProFlex, 20 ProFlex Operator's Manual page 36

IMPORTANT INFORMATION
The blades on a BioClip deck should be set
at 90 degrees to each other. In all other
cases the blades can collide and cause
serious damage to the cutting unit.
4. Assembly: First fit the lower belt and then the
upper belt.
Ensure the blades are positioned as set out in
the diagram, at 90 degrees to each other,
otherwise the belts must be adjusted. When the
blade bearings are loose the belts can be
moved around to the next tooth.
Tighten the nuts enough so that the bearings
rest against the cutting hood but still can be
moved.
Tension the belt by turning the eccentric adjuster
on top of the cutting hood. Tighten the nut.
Tighten all nuts on the blade bearings.
5. When the belt can be moved 7 mm inwards using
a force of 10 N the belt is adjusted correctly.
Fit the protective cover over the belts and
replace the parallelism arm.
Belt replacement on cutting unit's with side or
rear ejectors
Cutting units with side or rear ejectors are powered
by one V-belt. Proceed as follows to replace the
V-belt:
1. Loosen the unit frame (1), the bolt on the
parallelism arm (2) and the two bolts on the
hood (3). Lift off the cutting unit's hood.
2. Loosen the spring that tensions the V-belt and
pry off the belt.
To fit a new belt, follow the instructions above in
the reverse order.
34
– English
MAINTENANCE
90 90
7 mm
10 N
3
3
1
2