Nicol Scales & Measurement LoadRunner Series Installation & Service Manual
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Contents
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Service and Troubleshooting 215.0 Service and Troubleshooting5.1 System MaintenanceThis section of the manual is intended to assist the user with techniques for system maintenance andtroubleshooting. Maintenance of the onboard scale can be done quickly and needs to be done at regular intervals.For service issues make sure you have original test numbers to work with, the test numbers help locate a problemsource quickly. Scale meters are built with simple but effective internal system diagnostics programs that isolatecomponent performance.With reference to onboard scale service and repair procedures that involve load pins, trunnions and air transducers,some fundamental precautions and recommendations must be observed by servicing personnel.WARNING Failure to observe these recommendations and instructions could result in a hazardous operatingcondition.• Servicing personnel must ensure that all vehicle structures are free from cracks, excessive wear, corrosion,alignment problems, etc. that can affect safety and scale performance.• The instructions outlined herein are designed to ensure that a properly serviced installation will providemaximum safety, optimum system performance and accuracy, for a long operating life. It is thereforeextremely necessary that the installer comply with all guidelines and material specifications outlined in thismanual, with special emphasis on detail and inspection of work.• Service and repair work must be in compliance with appropriate regulations of the U.S. Department ofTransportation (DOT), state and local regulations, the recommended standards and practices of the Societyof Automotive Engineers (SAE), standards of the American Welding Society (AWS), and therecommendations of the truck, trailer and body, hoist and/or suspension manufacturer.5.2 CalibrationSystem calibration needs to be performed at the time of original scale installation. Rice Lake Weighing Systemsrecommends that scale calibration be repeated about one month after original scale installation to adjust for anymechanical influences that "seat" a new scale.There is no typical interval for scale calibration that can be universally specified. Instead, operators should keepcomparison data of onboard scale loads as compared to weights obtained from certified platform scales orpre-measured loads. If this is not possible, six-month re-calibration intervals are recommended. See Section 4.7.5.3 Sensor Maintenance5.3.1 Load PinsFor hinge load pins, thorough pin lubrication is critical to proper scale performance. Ensure all load pins used inroll-off and other pin applications are always well-lubricated.5.3.2 Visual InspectionAt the end of each day, service personnel should perform visual inspections that look for:• Signs of wear or "polishing"• Signs of weld cracking or failure• Evidence of excessive corrosion• Evidence of potential chassis• Body runner or support structure cracking or bendingWhen the load pins were originally installed, instructions specified that mounting brackets required clean, flat,rigid and co-planar surfaces for welding. If these surfaces have become cracked, corroded or out of alignment, thencorrective action must be taken to ensure proper performance and safety of the onboard scale installation. |
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