Hillyard TRIDENT T20SC PRO, Service Manual

Page: 58 / 65

8.3 Maintenance and
Checks
8.3.1 Wheels
Check
(to perform every 150h )
The wheel must be free to rotate
smoothly without friction. The wheel
surface, must always be in good condi-
tion.
Maintenance
(to perform every 600h )
Periodically check the condition of the
bearings and bushings of the wheels. If
necessary, replace the part
(see section 4.4.1
at page 24 )
.
8.3.2 Traction Motor
Check
(to perform every 150h )
During normal driving, the power con-
sumption must be between 3 and 5
Amps.
ATTENTION:
At the start, the power
consumption of the motor is much
higher.
The carbon brushes of the traction mo-
tor must be at least
1
4
inch long. The
insulation of the motor supply cables
should be complete in every part and
show no signs of cracks.
The cables
must be flexible. When lifting the ma-
chine to put the front wheels in neutral
by spinning a wheel (in any sense) the
other must turn in the opposite direc-
tion.
Maintenance
(to perform every 600h )
Replacement of traction motor Carbon
Brushes:
Procedure:
• Secure the machine.
• Remove the traction unit from the
machine
(see section 4.4.2 at page 25 )
.
• Mark the correct positioning of the
motor hood before proceeding in the
operation.
• Remove the plastic side covers and
unscrew the screws that secure the
hood to the motor.
• Remove the connectors that fix the
carbon brushes to the mains supply
and remove the carbon brushes from
the body of the hood (do not miss the
compensating ring).
• Replace the carbon brushes being
careful not to ruin them during as-
sembly.
• Proceed to the reverse operations to
reassemble everything.
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