Caterpillar Fault Code
Free · no signupMID 087 CID 0373 FMI 05
Service Brakes Locked / Alarm Active
System
Braking / Traction
Symptom
Service Brakes Locked / Alarm Active
Diagnosis & fix steps
LOGIC: Hydraulic Brake Accumulator Pressure Release Solenoid Open.
ACTION: Check solenoid coil resistance on the brake valve block. Inspect brake manifold harness leads passing through the center swing turntable swivel manifold.
Red Seal field insights
Braking Safeguard: Drops pilot release pressure to the spring-applied multi-disc wet brakes if electrical solenoid continuity is lost, preventing runaway down pit ramps.
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