Hydraulic Cooler Efficiency Test on the JCB 403E | PicoScope 7 Diagnostic Walkthrough 🔧

🔧 In this test demonstration, Ben walks through how to assess hydraulic cooler efficiency on a JCB 403E electric wheel loader using PicoScope 7 and BNC+ accessories.

This is a real-world example of how PicoScope lets you combine temperature, current, pressure and maths channels to build a complete diagnostic picture of a hydraulic system under load.

What’s being measured in this test:

• Inlet temperature of the hydraulic oil (BNC+ temperature clamp)
• Outlet temperature from the cooler (BNC+ temperature clamp)
• Hydraulic pump pressure using the WPS600
• Electric motor load via a current clamp on the U-phase
• Temperature differential using an A–B maths channel

The goal is simple:
➡️ Determine how efficiently the hydraulic cooler is removing heat
A healthy cooler should show a clear difference between inlet and outlet temperatures over time.

What Ben demonstrates in the video:

• Setting up long time-base captures (100 s/div ~ 16 mins total)
• Using measurements to log maximum inlet vs outlet temperatures
• Renaming channels for clearer display
• Loading and running the hydraulic system to generate heat
• Observing temperature rise and system behaviour under load
• Using a maths channel to display the temperature differential directly
• Interpreting the results (inlet ~39°C vs outlet ~37°C in this demo)

Why this matters

Monitoring cooler performance is essential for diagnosing:
• Blocked or restricted cooler cores
• Failing cooling fans
• Poor flow through the hydraulic circuit
• Inefficient oil cooling under load
• Heat-related hydraulic issues

The same process can be applied to:
• Engine oil coolers
• Transmission coolers
• EV thermal management circuits
• Coolant radiators

A simple, practical example of using PicoScope for real diagnostic direction.

#PicoScope #PicoTechnology #Hydraulics #Diagnostics #Engineering #Oscilloscope #JCB #ElectricMachinery


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