INJECTOR GP- 1847687 - Caterpillar

weight of the payload that is displayed and recorded by the Truck Payload Measurement System (TPMS) will be accurate to 5 percent on 95 percent of the payloads. There are some conditions that could affect the accuracy of the TPMS weighing process. These conditions are listed below:
A truck is loaded on a sloped surface that is greater than 5 percent . Accuracy will become progressively worse as the slope becomes greater.
A suspension cylinder is not properly charged. The suspension cylinder may not cause an event even if the charge is correct. However, the weighing accuracy will be affected.Note: Refer to the Special Instruction, SEHS9411, "Suspension Cylinder Servicing" for information on servicing the suspension cylinders.
Pushing down on the load with the loading tool during the loading process (packing the load)
Moving the truck more than 0.16 km (.1 miles) in any direction between bucket loads while loading.
Actuate the "bed raise lever" during loading.
A failure to have the TPMS calibrated after replacing system components.
A failure to have the TPMS calibrated after any substantial changes to the empty weight of the truck.
Using a conveyor or a continuous feed system for loading
A truck leaves the loading site before the pressure in the suspension cylinders has stabilized and the final weight has been displayed. This will cause the TPMS to estimate the weight of the final pass of the loader and add the value to the total of the other loader passes for that load.If a critical fault is detected by the TPMS a fault code will constantly be displayed on the POD. When a critical fault is detected in the system recorded weights may not be accurate.Major changes, such as the addition of wear plates to the body require you to recalibrate the TPMS. The accuracy of the real time clock measurements will be 1 second. The recorded times and dates of the real time clock will aid in identifying the causes of any unusual cycle data. The accuracy of the distance measurements will depend on the actual effective rolling resistance of the tires. The TPMS does not distinguish between tires of different sizes, manufacturers or tread depth. The distance measurements that are calculated by the TPMS use the average size of the tire for each model of truck. Distance measurements are recorded to the nearest 0.16 km (.1 miles). Note: If the first loader pass is dumped into truck bed before the truck has completely stopped it will not affect the accuracy of the final given payload weight total. The truck can be repositioned during loading, but once the truck travels more than 0.16 km (.1 miles) the TPMS considers the "loading cycle" complete.