construction diesel engines
Cummins diesel engines are engineered for powerful performance in construction applications worldwide, ensuring efficiency and promoting sustainable construction.
As a Cummins-authorized distributor, we specialize in supplying full-series diesel engines for construction applications, serving everything from compact urban excavators to massive quarry haul trucks.
Our lineup covers engines from 2.8L to 60L, and power from 60 HP to 2700 HP, offering complete solutions for:
- OEM engine integration
- Aftermarket replacement
- Retrofit & emission upgrades
Application-ready. Industry-trusted. Engineer-supported.For more information about our engine and services, call us at +86-18523737831, email us at info@joz-engine.com, or contact us directly through our online inquiry form.
Product Series Breakdown
We classify our construction diesel engines into four tiers based on equipment scale, application scenarios, and performance output:
1. Compact Power Series (60–160 HP)
For: Mini excavators, compact loaders, skid steers, gensets
| Engine Models | Displacement | Key Features |
| ISF2.8 | 2.8L | Lightweight, high fuel efficiency |
| ISF3.8 | 3.8L | Tier 3/4 capable, urban-friendly |
| QSB3.9 | 3.9L | Robust for light off-road gear |
| QSB4.5 | 4.5L | Higher torque, low NOx |
Advantages:
- Best-in-class power-to-weight ratio
- Simple integration for OEMs
- Low maintenance cost
Ideal For: Compact excavators, trenchers, urban forklifts, small pavers
2. Mid-Range Performance Series (160–300 HP)
For: Mid-sized excavators, road rollers, telehandlers, utility loaders
| Engine Models | Displacement | Key Features |
| 4B3.9 | 3.9L | Legendary mechanical reliability |
| 6B5.9 / QSB5.9 | 5.9L | Global parts support, stable performance |
| QSB6.7 | 6.7L | Electronic control, fuel adaptive |
| 6C8.3 / QSC8.3 | 8.3L | Tier III/IV ready, rugged design |
| 6L8.3 | 8.3L | Long service cycles, high uptime |
Advantages:
- Perfect for Tier II/III markets
- Strong aftermarket availability
- Electronic + mechanical options
Ideal For: Road machinery, mid-excavators, small cranes, graders
3. Heavy-Duty Series (300–500 HP)
For: Earthmovers, drill rigs, large loaders, rough terrain cranes
| Engine Models | Displacement | Key Features |
| QSL9 | 8.9L | Mid-frame torque leader |
| QSM11 | 10.8L | High-pressure injection, responsive load pickup |
| QSZ13 | 13L | High output, low NOx, Euro V support |
| NT855 | 14L | Legendary durability, mechanical simplicity |
Advantages:
- High continuous torque for construction cycles
- Emission tier coverage: Tier 2, 3, 4, Euro III-V
- Mechanical or ECU models, depending on site needs
Ideal For: Drilling rigs, tunnel borers, heavy forklifts, 30–40T excavators
4. Ultra-Heavy Series (600–2700 HP)
For: Mining trucks, mobile crushers, tunnel boring machines, big cranes
| Engine Models | Displacement | Key Features |
| K19 / KTA19 | 19L | Dual turbo, long overhaul intervals |
| KTA38 / KTA50 | 38L / 50L | Continuous-duty performance |
| QSK19 / QSK23 | 19L / 23L | Modular ECM, Euro 4 ready |
| QSK60 | 60L | 2700 HP, for maximum output zones |
Advantages:
- Designed for non-stop operation
- Advanced cooling & filtration systems
- Customizable for harsh climate & terrain
Ideal For: 70 T+ haul trucks, oilfield rigs, crushers, conveyors
Application Mapping Table
| Application Type | Recommended Series / Engines |
| Mini Excavators (3–8T) | ISF2.8, QSB3.9 |
| Backhoe Loaders / Skid Steers | ISF3.8, QSB4.5 |
| Pavers / Road Rollers | 6B5.9, QSB5.9, QSB6.7 |
| 20–40T Excavators | QSL9, QSM11, QSZ13 |
| Horizontal Drilling Machines | QSZ13, NT855, QSM11 |
| Mining / Rock Trucks | K19, QSK19, KTA38, QSK60 |
| Crushing & Screening Equipment | QSK23, QSK60, KTA50 |
Why JOZ?
- Full Model Coverage — From 2.8L to 60L
- Global Emission Tier Compatibility — Tier II, III, IV Final, Euro V
- Complete Engine Assemblies — Including ECM, Turbo, Fuel Systems
- On-Site Technical Support — With international engineer dispatch
- Ready-to-Ship Inventory — Quick lead times, reliable delivery
- Genuine Cummins Only — No imitation or refurbished stock
