HOUSING GP-FINAL DRIVE 2276198 - Caterpillar

Table 1
Measurements for the PL522 and 523 Antenna(1)
Cellular Center Connector Cellular Outer Connector GPS Center Connector GPS Outer Connector Metal Base of Antenna
Cellular Center Connector 0 + 3 Ohm 9K +/- 5% Ohm 495K +/- 15K Ohm 9K +/- 5% Ohm 9K +/- 5% Ohm
Cellular Outer Connector 9K +/- 5% Ohm 0 + 3 Ohm 486K +/- 15K Ohm 0 + 3 Ohm 0 + 3 Ohm
GPS Center Connector 584K +/- 15K Ohm 575K +/- 15K Ohm 0 + 3 Ohm 574K +/- 15K Ohm 574K +/- 15K Ohm
GPS Outer Connector 9K +/- 5% Ohm 0 + 3 Ohm 486K +/- 15K Ohm 0 + 3 Ohm 0 + 3 Ohm
(1) Valid only for Fluke 87 Series MultimetersNote: All measurements taken with a Fluke 87 V. Different multimeters might provide varying results.Results:Continue to the next test step.Test Step 11. VERIFY THAT THE CENTER CONDUCTOR OF THE ANTENNA HAS NOT SHORTED TO THE SHIELD.
Disconnect the GPS and the cellular antenna cable from the radio.
Measure the resistance from the shield of the antenna cable (GPS) and the cellular antenna cable to the conductor at the center of each of the cable connectors. The shield is the threaded part of the connector. Refer to Table 1 for a complete listing of resistance checks for the antenna and resistance values.Expected Result:The resistance for the GPS antenna meets the defined specifications in Table 1.The resistance for the cellular antenna meets the defined specifications in Table 1.Results:
OK - The resistance for the GPS antenna meets the specifications that are defined in the tables that are listed above. The resistance for the cellular antenna meets the specifications that are defined in the tables that are listed above. The resistance is correct.STOP
NOT OK - The resistance for the GPS antenna does not meet the specifications that are defined in the tables that are listed above. The resistance for the cellular antenna does not meet the specifications that are defined in the tables that are listed above. The resistance is incorrect.Repair: The antenna cable or the antenna has a short from the center conductor to the outer shield. Replace the antenna assembly. Verify that the radio is operating correctly.STOP