WORKSHOP MANUAL
MPV 320W / 520W
Chapter
6 - CUTTING DECK AND COLLECTION
EDITION
2017
PAGE
38 /
64
6.2.2 Blade control belt replacement
• Follow steps 1 to 10 of the "Verticalisation of the
cutting deck” procedure
[
.
With the cutting deck in the vertical position, loos-
en the screw (1) and remove the belt guide (2) to
free the belt (3) from the pulley (4).
Reassemble all removed parts, following the
above instructions in the reverse order.
6.2.3 Adjusting the tension of the blade control belt
NOTE
Make the adjustment with the cutting deck correctly assembled and in a fully lowered
position.
1. Remove the right side (1) fixed by a quick release fastener (2) and by a screw (3).
2. Perform a preliminary adjustment by screw-
ing or unscrewing the nut (4) until it is brought
to 1 mm from thread limit of the pin (5), corre-
sponding to a length of the spring (6) of 58-62
mm.
3. Use a frequency meter to measure the tension
of the belt (7). The measured value should be
about 20-22 Hz when measured at the centre
of the branch along the longitudinal axis.
1
2
3
4
3
2
1
7
4
6
5
