Sandvik Toro Fault Code

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SPN 523775 FMI 04

Bucket Curl Dead / Dump Function Slow

System

Hydraulics / Bucket

Symptom

Bucket Curl Dead / Dump Function Slow

Diagnosis & fix steps

LOGIC: Bucket Dump Pilot Proportional Valve Driver Short to Ground. ACTION: Measure resistance to ground on SICA output pin at main valve harness. Inspect wiring harness loom running under the cab floor plate for metal bracket chafing.

Red Seal field insights

Driver Protection: SICA low-side driver circuits shut down current delivery upon sensing a dead short to ground to prevent internal circuit board trace burnout.

Same code keeps coming back?

That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.

Book an uptime review

Read before you touch anything

  • This is general reference information, not a repair manual. It is for trained, qualified technicians.
  • Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
  • Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
  • You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
  • Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.

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