Description:

This diagnostic trouble code, TSC 523929.31, is triggered when, during bleeding of the cab suspension, the level position (more than 2.5 volts) is not reached within 300 seconds. Possible reasons include:

• Bleed screws not closed.
• Cab position sensor (B110) incorrectly installed.
• A problem at the solenoid valve for raising (Y43) or lowering (Y42) the cab suspension.
• A problem in the hydraulic circuit of the cab suspension.

Reaction:

When this error occurs, the cab suspension system may not bleed properly, leading to potential air entrapment and improper suspension function.

Recommendations:

Close Bleed Screws:

• Ensure Bleed Screws Are Closed:
  • Check and close all bleed screws properly during the bleeding process.

Inspect Cab Position Sensor:

• Verify Sensor Installation:
  • Ensure the cab position sensor B110 is installed correctly.
  • Reinstall the sensor if necessary.

Inspect Solenoid Valves:

• Check Solenoid Valve Functionality:
  • Verify that the solenoid valves for raising (Y43) and lowering (Y42) the cab suspension are operating correctly.
  • Replace any faulty solenoid valves.

Inspect Hydraulic Circuit:

• Check for Hydraulic Issues:
  • Inspect the hydraulic circuit for any signs of blockages, leaks, or other issues.
  • Repair any identified problems in the hydraulic circuit.

Note:

Proper bleeding of the cab suspension system is essential for removing air and ensuring smooth operation. Regular inspections and maintenance of the cab position sensor, solenoid valves, and hydraulic circuit are necessary to prevent bleeding issues.