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McCloskey crushers, screeners, and stackers are built to handle some of the toughest jobs in the world — but when emissions systems like DEF, DPF, and EGR fail, even the most rugged machines can come to a grinding halt. These systems are designed to meet environmental regulations, but in heavy-duty applications like quarrying, mining, and aggregate production, they can cause costly downtime, reduced performance, and expensive repairs.
TM AG Tuning offers professional DEF, DPF, and EGR delete tuning for McCloskey equipment, helping operators eliminate these recurring problems, improve reliability, and keep production moving.
What Are DEF, DPF, and EGR Systems?
Before discussing the benefits of deleting them, let’s break down what each system does and why it can cause trouble in McCloskey equipment.
- DEF – Diesel Exhaust Fluid
DEF is a urea-based fluid injected into the exhaust to break down nitrogen oxide (NOx) emissions. The system requires:
- A DEF tank
- Pumps and injectors
- Sensors and heating elements
If any part fails, the machine can enter limp mode or even shut down. In cold climates, DEF can freeze, adding more complications for operators working in outdoor environments.
- DPF – Diesel Particulate Filter
The DPF captures soot and unburned carbon particles from the exhaust. Over time, it fills up and must be cleaned through a regeneration process that burns off the buildup. In real-world McCloskey operation:
- Machines idle for long periods
- Load varies constantly
- Regeneration cycles often fail to complete
The result? Clogged filters, high back pressure, loss of power, and higher fuel consumption. Replacing a DPF can cost thousands of dollars.
- EGR – Exhaust Gas Recirculation
The EGR system recirculates a portion of exhaust gas back into the intake to lower combustion temperature and reduce NOx emissions. While this reduces emissions, it also:
- Increases soot buildup in the intake manifold and valves
- Raises the risk of engine overheating
- Decreases fuel efficiency and engine life
Why McCloskey Equipment Struggles with Emissions Systems
McCloskey machines are often used in quarries, gravel pits, and mining sites — harsh environments that are dusty, high-load, and far from service centers. These conditions are the perfect recipe for emissions system failures:
- Dust can damage sensors and clog filters
- Heavy workloads keep the engine under constant strain
- Remote work sites make emergency repairs costly and time-consuming
Benefits of DEF, DPF & EGR Delete for McCloskey Machines
When TM AG Tuning deletes these systems through expert ECU programming, you can expect:
✅ Maximum Uptime
No more limp mode or shutdowns from failed DEF sensors or clogged filters.
✅ Increased Power & Torque
Free-flowing exhaust and optimized engine mapping restore lost horsepower and improve response.
✅ Better Fuel Efficiency
Without DPF regenerations and EGR flow, fuel burns cleaner and more efficiently.
✅ Reduced Maintenance Costs
No DEF refills, no DPF replacements, no EGR cleanings — saving thousands over the life of the machine.
✅ Longer Engine Life
Lower exhaust back pressure and reduced soot in the oil mean less wear on critical components.
Our Process
At TM AG Tuning, we provide custom ECU calibrations for many McCloskey models. Depending on the engine and ECU, we can:
- Perform remote tuning using your laptop and a Nexiq or DPA5 diagnostic interface
- Offer send-in ECU programming for models requiring bench work
- Provide complete emissions system deactivation while keeping engine safety systems intact
McCloskey Models We Can Service
We can tune many McCloskey machines equipped with Tier 4 Final and Stage V emissions systems, including:
- McCloskey J Series Jaw Crushers (J40, J50, J45, etc.)
- McCloskey C Series Cone Crushers (C2, C3, etc.)
- McCloskey S and R Series Screeners (S190, S130, R155, R230, etc.)
- McCloskey Stackers and Conveyors
If your machine isn’t listed, contact us for model-specific support.
Contact TM AG Tuning
If your McCloskey crusher, screener, or stacker is constantly sidelined by DEF, DPF, or EGR issues, TM AG Tuning can help. Our delete tuning solutions improve reliability, performance, and productivity — so you can focus on getting the job done.
Call us today or send your machine details for a free consultation.
