Caterpillar Fault Code

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735-6

Heavy Lift Solenoid: Current Above Normal

Variant 1

System

Hydraulic

Symptom

Heavy Lift Solenoid: Current Above Normal

Diagnosis & fix steps

LOGIC: Over-current on the heavy lift circuit. ACTION: Check the solenoid resistance (typically 25–35 ohms).

Red Seal field insights

Often paired with E1239 on excavators equipped with the "Heavy Lift" software package.

Variant 2

System

Hydraulic

Symptom

Heavy Lift Locked / Noisy MCV

Diagnosis & fix steps

LOGIC: Heavy Lift Solenoid Current Above Normal. ACTION: Check solenoid resistance (Target 30.8±2Ω). Inspect for pinched harness at the Rear Main Control Valve.

Red Seal field insights

Location: Mounted on the rear face of the Main Control Valve (MCV) bank. Voltage: 24V PWM.

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.

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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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