8.4.6 Vacuum Motor
Check (to perform every 150h)
The vacuum motor with the inlet com-
pletely open has to absorb less than 14
Amps.
The motor should rotate evenly and
smoothly and doesn’t have to produce
unusual noises. The motor contacts
have to be clean, they have not to show
signs of wear or heating in general.
The motor wires insulation has to be
intact in all its parts and does not show
signs of cracks. The single cable have to
be flexible.
The magnetic circuit of the motor has
to be in good conditions and clean.
The carbon brushes must be 6-8 mm
long and they have not to be abnormally
worn out.
Maintenance (to perform every 450h)
• Put the machine in safe conditions.
• Disassemble the motor from the ma-
chine (see section 5.3.6 at page 29).
• Remove the cooler fan plastic cover
from the motor.
• Remove the screws that secure the
carbon brushes
• Slip off the motor carbon brushes
• Replace the worn out carbon
brushes with new ones.
• Proceed at reverse to restore the
parts.
8.4.6-128 Plastic Cover
Removing
8.4.6-129 Carbon Brushes
Removing
8.4.7 Drain Hose
Check (to perform every 4h)
The Drain Hose has to be perfectly fit-
ted in the recovery tank fittings in or-
der to avoid any dirty water leakage. The
Drain Cap has to seal perfectly the hose
to avoid any pressure drop or dirty wa-
ter leakage. The Drain Manifold has to
be flexible and has to have no cracks to
avoid any break down during the bend-
ing to drain the machine.
8.4.7-130
64
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