Liebherr Fault Code
Free · no signupE 502
Hydraulic speed slows down; cooling fan runs at max RPM.
System
Not specified
Symptom
Hydraulic speed slows down; cooling fan runs at max RPM.
Diagnosis & fix steps
ACTION: 1. Check hydraulic oil level.
2. Inspect oil cooler for debris blockage.
3. Test Brown ground wire for resistance.
Red Seal field insights
Liebherr fans are often hydrostatic. If the fan isn't spinning at full speed when the oil is hot, the fan drive solenoid is likely stuck or disconnected.
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.
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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