HOSE-BREATHER 3617549 - Caterpillar

Calibration
The Payload Control System (PCS) should be properly calibrated by a Caterpillar dealer. Recalibration
Recalibration of the system is required when one of the following events occur:
Replacement of the ECM
Replacement or adjustment of the position sensor
Replacement of the head or replacement of the sensor for the lift cylinder rod end
Replacement of the bucket
Modifications to the bucket
Modifications to the lift linkage
The PCS is moved from one machine to another machine. Every machine is different and the calibration will vary for each machine.Note: For information on performing a recalibration of the PCS, see, RENR6293, "Calibration". The calibration is password protected.Simple CAL Update
The simple CAL update provides a method for fine tuning the PCS. Fine tuning the PCS accounts for a constant offset error between the weights of the PCS and the weights of the scale house. A constant offset error could be caused by the following events:
Spillage of material during calibration before the calibration weight is weighed.
Incorrect entry of the calibration weight into the display
Spillage of the material during the loading of the materialNote: The machine cannot be turned OFF while a simple CAL update is being performed. If the machine is turned off, all information that was previously stored for the update will be lost. The lost information includes the history of trucks that were loaded.The simple CAL update requires the actual weights of the scale house for ten truck loads that have been loaded with PCS. The tare weights of these ten loads must be accurate. If the tare weights are not accurate, performing the simple CAL update could have adverse effects on the accuracy of the system.Note: The simple CAL update can not be performed unless the operator presses the store button after each truck load.
Illustration 1 g01319525
Service setup: Simple CAL update screenIn order to perform a simple calibration, record the weights on ten trucks at the scale house and the weight that is displayed by the PCS for the ten trucks. The scale house weights will be entered into the PCS during the simple process for calibration. Perform the following in order to access the simple CAL update:
Press the "back" button and press the "up/left" button simultaneously.The display shows up to 15 truck loads. The trucks are listed in the order of loading. Refer to Illustration 2.
Illustration 2 g01523274
Simple CAL update screenNote: The first 15 truck loads that are shown on the display are the truck loads that were loaded immediately after powerup. If more than 15 trucks have been loaded after powerup, only the fifteenth truck on the display gets replaced with the most recently loaded truck.When the simple calibration update has started, the most recently loaded truck will be displayed at the bottom of the list. When auto truck ID is enabled, the following will match:
The Truck ID that is in the list
The Truck ID that was assigned to the truckNote: The assignment was made when the store switch was pressed. The following occurs when the auto truck ID feature is disabled:
The truck ID will change to