WORKSHOP MANUAL
MPV 320W / 520W
Chapter
6 - CUTTING DECK AND COLLECTION
EDITION
2017
PAGE
45 /
64
6.2.9 Setting the electromagnetic clutch air gap
WARNING!
- This adjustment must be carried out if the blades do not stop within 5
seconds of disengagement.
IMPORTANT
The correct adjustment foresees an air gap of from 0.38 to 0.6 mm between the
rotor and the armature
.
NOTE
- This setting can be executed without removing the clutch from the machine. The figure
shows the disassembled clutch only to make the procedure clearer.
[
.
1. Insert a thickness gauge between the armature and the rotor, through the designated slit.
2. Slowly tighten the brake adjuster nut (10) until
the thickness gauge comes into contact with
the armature and the rotor.
NOTE
This clutch uses 24UNF adjustment
nuts, therefore one turn of the nut is equivalent
to about 1 mm of axial movement.
IMPORTANT
During the adjustment, bear in
mind that:
• the air gap with lower set values increases
the period that elapses between one regula-
tion and another.
• the gap set to a lower value reduces to a min-
imum the duration of the clutch.
3. Transfer the same adjustment settings to all
the nuts.
On completing the setting process:
4. Engage the clutch.
5. Rotate the armature and the rotor to ensure
that there is no contact between the armature
and brake. In case of contact, loosen the brake
nuts and try again until the contact has been
eliminated.
10
1
2 3 4 5
6 7
8
9
10 11
1.
Armature / pulley unit
2.
Brake cover
3.
Armature
4.
Pulley
5.
Armature spring
6.
Bearing
7.
Bearing hub
8.
Rotor
9.
Winding
10.
Adjuster nut
11.
Spring
