How to Resolve JCB Excavator C130C-13 Spool Brake Solenoid Open Circuit

This guide provides step-by-step instructions to diagnose and resolve the C130C-13 Spool Brake Solenoid Open Circuit issue on JCB 140 excavators.

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2025 JCB ServiceMaster 4 v25.1.0 Free Download for Win 10 Win11
JCB Diagnostic tool

Potential Causes:

1. Defective spool brake solenoid coil.
2. Disconnected or faulty wire harness connected to the spool lock solenoid.

Diagnostic Procedure:

1. Check Solenoid Coil Resistance
   • Use a multimeter to measure the resistance across the terminals of the spool lock solenoid coil.
   • The correct resistance should be approximately 37 ohms.
   • If the value is significantly different, the coil may be faulty.
2. Inspect Wire Harness Connection
   • Ensure the wire harness is securely connected between the spool lock solenoid and the machine wiring system.
   • Use the attached diagram or photo for solenoid location reference.

Corrective Actions:

3. Replace the Solenoid Coil
   • If the resistance test indicates a faulty coil, replace it with a new, compatible unit.
4. Repair or Replace the Wire Harness
   • If the wiring is found to be damaged, corroded, or not properly connected, repair or replace the faulty section.

More topics for JCB machine,please refer to:JCB Machine Trouble Repair.