Smooth DEF Flow You Can Trust: JCB QLS Head Unit – OEM 320/B9263
What is it?
The JCB QLS Head Unit (OEM 320/B9263) is a crucial component in the DEF dosing system for JCB machines powered by Cummins QLS engines. It regulates the flow of Diesel Exhaust Fluid into the exhaust stream and monitors key metrics—fluid level, pressure, and temperature—ensuring the system operates precisely under variable load conditions.
Why opt for this OEM Head Unit?
Designed for seamless compatibility with JCB’s factory wiring and control systems, this head unit installs easily without needing any calibration tweaks. Using the genuine part avoids DEF delivery glitches, warning alerts, or control system lockouts that can occur with non-OEM alternatives.
Key Benefits
✅ Direct OEM replacement for JCB Cummins QLS platforms
✅ Ensures steady DEF delivery for consistent system function
✅ Real-time sensor tracking of DEF level, pressure, and temperature
✅ Durable in rugged conditions including vibration and temperature changes
✅ Helps reduce warning alerts and prevent unnecessary system restrictions
Applications
Ideal for JCB excavators, loaders, backhoes, and other construction machinery fitted with Cummins QLS engines. This CPU ensures reliable DEF system performance across heavy-duty and idle-heavy operations.
Installation Notes
Begin by clearing power and relieving DEF system pressure. Carefully remove the old unit, keeping connectors clean. Install the OEM 320/B9263 head unit using factory-standard plugs for both electrical and fluid connections. Once in place, restore system power, clear any fault codes, and confirm correct DEF flow and sensor responses with a diagnostics tool.
Final Thoughts
If your JCB equipment is experiencing DEF dosing faults, control errors, or SCR-related faults, this OEM QLS Head Unit offers the precise fit and function needed to regain system performance. Trusted components like this—available now from Tamerx.