# Engine Cummins 4BT3.9 – reconditioned

> Cummins 4BT3.9 engine, refurbished, ideal for construction machinery. High efficiency and reliability.

- Category: [Diesel engines](https://wibako.com/shop/diesel-engines.md)
- Manufacturer: Cummins
- Stock number: 78068
- Condition: reconditioned
- Price: on request
- Availability: in stock

Engine Cummins 4BT3.9 – reconditioned. Fits: Wheel loader Case 621B, Skid steer loader Case 90XT, Skid steer loader Case 60XT and others.

## Specification

- name: Engine
- mark: Cummins
- type: 4BT3.9
- condition: reconditioned
- brand: Cummins
- category: Diesel Engines
- availability: On order

## Description

##### Cummins 4BT3.9 Engine After Overhaul – Ready Unit – Małopolska

We offer a fully remanufactured **Cummins 4BT3.9 engine**, professionally rebuilt in our service center. This is a **complete overhaul unit**, prepared for immediate operation in heavy conditions. The engine is **available** in stock, minimizing costly downtime for your business.

The **engine remanufacturing** process was carried out adhering to the highest technical standards. Every **repaired engine** undergoes rigorous testing to ensure long service life and full operational efficiency.

###### Technical Specifications and Scope of Work – Cummins 4BT3.9 Overhaul

- **Comprehensive Crank-Piston System Overhaul** – new pistons, rings, liners, and bearings (main and connecting rod) were installed using high-quality **spare parts**.
- **Fuel and Injection System** – the injection pump and injectors underwent a full **service** and calibration, guaranteeing optimal combustion and performance dynamics.
- **Cylinder Head and Crankshaft** – includes head resurfacing, seal replacement, and crankshaft alignment verification.
- **Diagnostics and Dyno Testing** – every engine undergoes load tests to confirm factory parameters and system tightness.
- **New Consumable Components** – a new water pump and oil pump have been installed, ensuring stable lubrication and cooling.

###### Applications for the Cummins 4BT3.9 Unit

This model is a proven **engine for excavators**, **loaders**, and a popular **engine for agricultural machinery** or power generators. Thanks to its mechanical design, **engine repair** for this type is cost-effective, and the unit is famous for its legendary resistance to overloading. It also works perfectly as an engine for dumpers or dozers.

###### Why Choose a Remanufactured Engine?

- **Reliability and Availability** – the unit is assembled and ready for shipping or installation.
- **Time Savings** – avoid long waits for the **repair** of your own component; we offer a ready-to-go solution.
- **Professional Mobile Service** – we provide technical support at the customer's site across the **Podhale** region, the entire province, and nationwide.
- **Quality Guarantee** – every **overhauled engine** is covered by a warranty, providing peace of mind for your investment.

###### FAQ – Frequently Asked Questions

- **Has the Cummins 4BT3.9 engine been load-tested?** Yes, every unit leaving our workshop undergoes tests performed on our **dyno** to eliminate any hidden defects.
- **Do you offer spare parts for this model?** Yes, we provide a wide selection and sale of **parts**, including originals and proven replacements.
- **Is on-site engine installation possible?** Yes, our **construction machinery service** has the necessary equipment to perform installation and the first startup at your facility.

###### Call to Action

Need a functional machine "as of yesterday"? Contact us! We offer expert advice, fast shipping, and professional **diagnostics**. Your machine deserves a second life with a quality guarantee.

###### Cummins – A Global Leader in Power Technology

The **Cummins** brand is an American legend with a history dating back to 1919. Founded by Clessie Cummins, the company became a global pioneer in diesel engine production. The B-series units, to which the **Cummins 4BT3.9** belongs, are recognized as some of the most successful designs in industrial history.

Engines from this brand power millions of machines worldwide – from RAM trucks to the heaviest mining and construction equipment. By choosing Cummins, you choose technology that has stood the test of time, offering an unbeatable power-to-weight ratio and simplicity of maintenance. Our company continues this tradition, providing professional **service** and rebuilding of these reliable machines.

## Fits (machines and engines)

- Wheel loader Case 621B
- Skid steer loader Case 90XT
- Skid steer loader Case 60XT
- Skid steer loader Case 70XT
- Skid steer loader Case 75XT
- Skid steer loader Case 85XT
- Wheel loader Case 621
- Crawler excavator Komatsu PC120-6
- Crawler excavator Sumitomo SH200HD-3
- Roller Dynapac CA151/151 DEUTZ
- Backhoe loader JCB 3CX
- Crawler excavator Komatsu PC130-5K
- Telescopic handler SkyTrak (JLG) 6036
- Telescopic handler SkyTrak (JLG) 8042
- Forklift Hyster H150HD
- Ładowarka Gehl 6635
- Wheel loader Komatsu WA120-3
- Równiarka drogowa Komatsu GD305A-1
- Ładowarka Case 1840
- Ładowarka Case 1845C
- Ładowarka Case 40XT
- Ładowarka Case 95XT
- Backhoe loader Case 480E
- Backhoe loader Case 480F
- Backhoe loader Case 580SUPERK
- Backhoe loader Case 580L
- Ładowarka Case 570LXT
- Crawler excavator Case 9010
- Crawler excavator Case 9010B
- Crawler excavator Case 9020
- Crawler excavator Komatsu PC100-5
- Crawler excavator Komatsu PC120-3
- Crawler excavator Komatsu PC120-5
- Crawler excavator Komatsu PC150-5
- Wheel loader Komatsu WA120-1
- Wheel loader Komatsu WA150-1
- Wheel loader Komatsu WA180-1
- Telescopic handler SkyTrak 5030
- Crawler excavator Hyundai R130LC-3
- Wheeled excavator Hyundai R130W
- Forklift Hyster H250HD
- Ładowarka Gehl 5635
- Ładowarka Mustang 2060
- Ładowarka Mustang 2070
- Rębak do drewna Vermeer BC1000XL
- Rębak do drewna Vermeer BC1250
- Wiertnica horyzontalna Vermeer D24X40
- Walec wibracyjny Dynapac CC422
- Walec drogowy Ingersoll Rand SD100
- Walec drogowy Ingersoll Rand SD105
- Telescopic handler Gradall 534D6
- Telescopic handler Gradall 534D9
- Równiarka drogowa Champion 710
- Van Grumman Olson P30
- Podwozie dostawcze Freightliner MT35

## Reference numbers

4BT3.9

## Guides and case studies

- [Service and Repair of Cummins 4BT3.9 Engine](https://wibako.com/about-us/service/532-service-and-repair-of-cummins-4bt3-9-engine.md)
- [Overhaul of the Cummins 4BT3.9 Engine](https://wibako.com/about-us/news/316-overhaul-of-the-cummins-4bt3-9-engine.md)
- [Cummins 4BT3.9 Engine Overhaul](https://wibako.com/about-us/news/146-cummins-4bt3-9-engine-overhaul.md)
- [Renovation of the Liebherr D946 A7 Engine in the Liebherr L 580 Loader](https://wibako.com/about-us/news/640-renovation-of-the-liebherr-d946-a7-engine-in-the-liebherr-l-580-loader.md)

![Photo: Engine Cummins 4BT3.9](https://wibako.com/images/2168700_1771934236075_1000x1000.webp)

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Source: https://wibako.com/shop/diesel-engines/10758X78068-engine-cummins-4bt3-9
Contact: +48338704200, biuro@wibako.pl