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PANEL A 0876280 - Caterpillar



0876280 PANEL A Caterpillar parts PANEL
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Alternative (cross code) number:
CA0876280
087-6280
0876280
Caterpillar 0876280 PANEL A

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Illustration 6 g03690310
Machine ECM inside the Center Console
Illustration 7 g03690603
Location of the Implement (Screed) ECM (Cover in place)
Illustration 8 g03690607
Location of the Implement (Screed) ECM (Cover removed)
Locate the appropriate ECM for the Material Height Sensor to be tested. Locations for the Machine ECM and the Implement (Screed) ECM are above.
Illustration 9 g03690424
Machine ECM and Implement (Screed) ECM connections for the Material Height Sensors
Locate "J1" and "J2" connectors on the ECM.
Ensure that the engine start switch is turned to the OFF position.
Illustration 10 g03690433
Material Height Sensor Connections
Note: The diagram above is a simplified schematic of the Material Height Sensor connections. The schematic is electrically correct. However, not all the possible harness connectors are shown.For the full Electrical Schematic of your specific Asphalt Paver, refer to the appropriate media. Refer to the "Electrical Schematic Reference" table within the Troubleshooting, General Information story in this document.
Illustration 11 g00951356
Connect the ground lead on multimeter (A1) to a Frame Ground point of the machine. sensor.
Insert one of the spoons or probes from the multimeter (A1) +Voltage lead into the "Signal" connection for the sensor.
Ensure that the multimeter is set at "%" or the duty cycle setting.
Turn the engine start switch to the ON position. Do not start the engine.
Measure the duty cycle when the paddle sensor is in the DOWN position or the VERTICAL position. The multimeter (A1) should have a duty cycle reading of 95% 2%. If the duty cycle reading is not within these limits, an adjustment is required. See Troubleshooting, "Calibrate".Note: A helper may be needed to perform this step.
Slowly move the arm of the paddle sensor to the FULL OFF position (approximately 45°) and observe multimeter (A1). The duty cycle reading should slowly decrease with no fluctuation until the paddle sensor is full off. Multimeter (A1) should have a duty cycle reading of 52% 3%. If the duty cycle reading fluctuates erratically, replace the sensor. If the readings are not within these limits, an adjustment is required. See Troubleshooting, "Calibrate".
Leave the test equipment in place as you adjust the sensor.
Remove the spoon or probe from the Signal connection for the sensor and insert the spoon or probe in the Signal connection for a different Material Height Sensor. Repeat the test procedure from Step 5 for this Sensor.Note: Measure the duty cycle when the paddle sensor is in the DOWN position or the VERTICAL position. The multimeter (A1) should have a duty cycle reading of 15% 3%. When the paddle sensor is in the 45° position, multimeter (A1) should have a duty cycle reading of 57% 3%.Sonic Sensor
Illustration 12 g00977604Test Procedure
Perform the following procedure before you perform the test procedure that follows:
Park the machine on a level area that is clear from all equipment, material, and personnel.
Verify that the service brake system and the parking brake system are in good working order.
Apply the parking brake.
Locate the Implement (Screed) ECM.
Locate "J1" and "J2" connectors on the Implement (Screed) ECM.
Ensure that the engine start switch is turned to the OFF position.
Attach the ground lead of


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