Casagrande Fault Code

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E-55

Rotation Jerky.

System

Not specified

Symptom

Rotation Jerky.

Diagnosis & fix steps

LOGIC: Rotary Head Speed Sensor Data Erratic. ACTION: Check the MPU (Magnetic Pick-Up) on the rotary gearbox.

Red Seal field insights

Slurry can ingress into the sensor housing. Remove, clean the tip of any metal "fuzz," and reset the gap to 0.5mm.

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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