Checking The Cutting Unit's Parallelism; Adjusting The Parallelism Of The Cutting Unit; Replacing The Cutting Unit Belts - Husqvarna 155 Operator's Manual

5 Adjust the unit's ground pressure by screwing in or out the
adjusting screws located behind the front wheels on both
sides. The ground pressure should be between 12 and 15
kg (26.5-33 lb).
Checking the cutting unit's
parallelism
Check the cutting unit's parallelism as follows:
1 Check the air pressure in the tyres 60 kPa/0.6 kp/cm
PSI.
2 Place the machine on a flat surface.
3 Put the lifting lever in the mowing position.
4 Measure the distance between the ground and the front
and rear edges of the cutting unit hood. The cutting unit
should have a slight slant, with the rear edge 2-4 mm (1/
8") higher than the front edge.
Adjusting the parallelism of the
cutting unit
1 Remove the front hood and right-hand fender.
2 Undo the nuts on the lift strut.
3 Screw out (extend) the stay to raise the rear edge of the
cover.
Screw in (shorten) the stay to lower the rear edge of the
cover.
Maintenance
4 Tighten the nuts after adjustment.
5 On completion of the adjustment the unit's parallelism
should be re-checked.
6 Fit the right-hand fender and the front hood.

Replacing the cutting unit belts

!
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 cutting unit.
2 Undo the bolt on the lift strut and the two screws on the
cover. Lift the cover off the cutting unit.
2
/8.5
3 Loosen the spring (4) that tensions the V-belt and pry off
the belt.
Simply reverse the procedure to fit the new belt.
WARNING! Wear gloves to protect your
hands when working with the blades.
There is a risk of crush injuries when
working with the belt.
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English