725 and 730 Articulated Trucks Braking System Caterpillar


Solenoid Valve (Parking Brake) - Test

Usage:

725 AFX

Table 1
Required Tools    
Part Number     Part Description     Qty    
6V-7070     Digital Multimeter     1    



    Illustration 1g01039796

    Solenoid valve for the parking brake

  1. Check for fault codes on the Monitoring and Display (Instrument Cluster). Follow the procedures for any diagnostic fault codes.

  1. Disconnect the cable to the solenoid valve.

  1. Check the resistance of the solenoid valve for the parking brake between the two pins of the connector. The resistance should be 42 ± 1 Ohms at 25°± 5°C (77° ± 10°F).

  1. If the resistance of the solenoid valve for the parking brake is not within the resistance specification, replace the solenoid valve.

  1. If the resistance is within specifications for the solenoid valve for the parking brake apply 24 VDC to the solenoid valve. The core of the solenoid valve for the parking brake should move when voltage is applied.

  1. If the core of the solenoid valve for the parking brake does not move then the solenoid valve is damaged. Replace the damaged solenoid valve.

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