Hillyard TRIDENT T20SC PRO, Service Manual

Page: 56 / 65

7.4.5 Recovery Tank
Check
(to perform every 150h )
The recovery tank has to be clean and
has not to have cracks or, in general, any
kind of damage. The Lid housing has to
be even and flat to allow the gasket to ad-
here perfectly to the tank to avoid any air
infiltration. The hose fittings have to be
in optimum condition in order to avoid
any dirty water leakage or any pressure
drop during the job.
7.4.6 Filter and Floater
Check
(to perform every
4h
)
The filter has to be clean and it is impor-
tant that nothing blocks or reduces the
floater mobility. The filter has to be clean
to avoid that water or dirt goes inside the
vacuum motor, the floater has to be free
to move and has to block completely the
air flow when it is in blocking position
(UP).
Maintenance
(to perform every
4h
)
• Put the machine in safe conditions.
• Check that the recovery tank is com-
pletely empty.
• Rotate the Recovery tank lid.
• Unscrew and remove the filter pro-
tection and the filter. Verify that the
filter ball is free to move and intact.
• Remove and clean (replace if neces-
sary) the filter.
7.4.6-12 7.4.6-13
7.4.7 Vacuum Motor
Check
(to perform every 150h )
The vacuum motor with the inlet com-
pletely open has to absorb between 15
and 18A. The motor carbon brushes
have to be in good conditions and their
length has to be no lower than
1
4
inch.
The motor contacts have to be clean,
they have not to be oxidized or have any
kind of damage. The motor wires insula-
tion has to be flexible and intact to avoid
any possible short circuit. The magnetic
circuit of the motor has to be in good
conditions and clean.
Maintenance
(to perform every 450h )
• Put the machine in safe conditions.
• Disassemble the motor from the ma-
chine
(see section 4.3.6 at page 24 )
.
• Remove the cooler fan plastic cover
from the motor.
7.4.7-14 7.4.7-15
• Slip off the motor carbon brushes.
• Replace the worn out carbon
brushes with new ones.
• Proceed at reverse to restore the
parts.
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