NORAC UC4.5-BC Operator Manual - Manual (Page 41)

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11 Maintenance
The NORAC Spray Height Control system requires very little maintenance, but there are a few
procedures that will ensure the system continues to work correctly for many years.
Before each day:
• It is highly recommended that the sprayer friction pads are greased. To ensure optimum
performance this should be done daily. This will ensure the boom is pivoting
separately from the sprayer. It is very important to keep the friction pads greased on
Active Roll™ systems.
• Ensure the height sensor breakaway brackets are functioning correctly. Apply grease to the
moving parts if necessary, to ensure they return to center after a break-away occurs.
• Ensure there is a clean, dry foam disc inserted in each sensor. If it is clogged with dust or
other debris, clean it as described below.
At the end of the season:
• Replace the oil filter in the NORAC hydraulic manifold annually (NORAC P/N 106285).
Cleaning Ultrasonic Height Sensors:
• Remove the foam disc from the sensor and wash it with clean water. Squeeze out excess
water and allow the foam disc to dry. The sensor can be used if the foam is wet, however a
valid height reading may not be obtained until it is completely dry.
• If the transducer inside the sensor is also dirty, wash it using clean water. Remove the
sensor from the bracket and rinse debris from the transducer by pouring water
across the face of the sensor. Do not submerge or pressure-wash the sensor. A
soft bristle brush can also be used to gently clean the transducer if water alone is not
sufficient. Use caution not to scratch or tear the transducer as it is fragile. The sensor
should be left to dry with the transducer facing downwards. The sensor can be used if it is
wet, however a valid height reading may not be obtained until it is completely dry. Leaving
the control system powered on with the sensor connected and facing down will speed the
process of drying the sensor.
• Chemicals or compressed air should never be used to clean the sensor.