Hydraulic Oil Temperature High

Volvo CE Heavy Equipment Warning Hydraulic

Model: Volvo L120H Wheel Loader | Code: VOLVO HYD-02

Applicable Systems
EC220 Excavator

Symptoms

Hydraulic oil temperature above 95C; hydraulic system efficiency reduced; oil degradation risk.

Possible Causes

  • Hydraulic oil cooler clogged
  • Oil level low causing overheating
  • Internal hydraulic leak generating heat

Troubleshooting Steps

  1. Step 1: Check hydraulic oil level (warm)
    Level at FULL mark
  2. Step 2: Inspect hydraulic oil cooler for blockage
    Cooler fins clean
  3. Step 3: Check oil condition (dark/burnt = degraded)
    Oil clean, normal color
  4. Step 4: Test for internal leaks in main control valve
    No excessive internal leak
  5. Step 5: Flush cooler and replace oil if degraded
    Oil temp below 85C at full load

How to Reset

Clear via Volvo Tech Tool after hydraulic oil service.

Common Replacement Parts

  • Hydraulic Oil Cooler P/N: VOE15890244
  • Hydraulic Oil (20L) P/N: VOE15890245

Frequently Asked Questions

  • Q: What is normal hydraulic oil temperature?

    Normal range 50-85C. Above 90C triggers warning. Above 100C may cause oil degradation and seal damage.

Related Volvo CE Fault Codes

Source: volvo fault codes reference

Category: Heavy Equipment