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OEM NEW B5.9 Engine Assembly

OEM NEW B5.9 Engine AssemblyPRODUCT DESCRIPTION Model: B5.9Category: Diesel EngineBrand: SWAFLYPlace of Origin: AmericaCondition: Original & OemWarranty: 6 monthsMOQ: 1 pcProduction Capacity: 1000p

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Product Detail

OEM NEW B5.9 Engine Assembly

PRODUCT DESCRIPTION
Model: B5.9		Category: Diesel Engine
Brand: SWAFLY		Place of Origin: America
Condition: Original & Oem		Warranty: 6 months
MOQ: 1 pc		Production Capacity: 1000pcs /Month
Standard or Nonstandard: Standard		Payment Term: L/C,T/T, Western Union, Tradeassurance
Delivery Time: 1-3 days (depend on order)		Means of Transport: By Sea, Air or DHL/FEDEX/TNT/EMS
Guarantee: We will check the engine and send detail pictures to buyer to confirm before shipping.

OEM NEW B5.9 Engine Assembly Technical Overview

The OEM NEW B5.9 Engine Assembly is a robust, inline-six cylinder diesel powerplant engineered for medium-duty commercial vehicles, industrial equipment, and power generation applications. With a displacement of 5.9 liters (360 cubic inches), this turbocharged, aftercooled engine combines advanced combustion technology, durable construction, and precise control systems to deliver optimal power, fuel efficiency, and reliability.

Core Design & Construction

The engine features a high-strength cast iron cylinder block with integrated steel main bearing caps, providing exceptional rigidity to withstand peak firing pressures up to 1,800 bar (26,100 PSI). The cylinder head, constructed from high-grade aluminum alloy, incorporates four valves per cylinder (two intake, two exhaust) for improved air charge efficiency. A forged steel crankshaft with induction-hardened journals and powder-metal connecting rods ensure long-term durability under heavy loads, while a lightweight aluminum oil pan reduces overall engine weight without compromising structural integrity.

Combustion & Fuel System

The B5.9 utilizes a direct-injection (DI) system with a mechanical rotary fuel pump (or optional electronic unit injector, EUI, for later models), delivering fuel at pressures up to 1,000 bar (14,500 PSI) for fine atomization and efficient combustion. The pre-combustion chamber design promotes uniform flame propagation, reducing noise and emissions while optimizing torque output—peaking at 610 N·m (450 lb-ft) at 1,400 RPM in standard configurations. A compression ratio of 17.3:1 balances cold-start performance with thermal efficiency, achieving a brake specific fuel consumption (BSFC) as low as 205 g/kWh under rated load.

Air Management & Turbocharging

**

A Holset® turbocharger with a wastegate actuator provides forced induction, boosting intake air pressure to 1.6 bar (23.2 PSI) and increasing volumetric efficiency by 30% compared to naturally aspirated designs. An air-to-air aftercooler reduces intake temperature by up to 50°C (122°F), densifying the air charge for more complete combustion and reduced NOx formation. The engine’s variable geometry intake manifold further optimizes airflow across the RPM range, ensuring responsive power delivery from idle (600 RPM) to rated speed (2,500 RPM).

Emissions & Compliance

Meeting EPA Tier 3 (2005) and EU Stage IIIA emissions standards, the B5.9 incorporates an exhaust gas recirculation (EGR) system with a cooled loop to reduce nitrogen oxide (NOx) by recirculating 15–20% of exhaust gases back into the combustion chamber. A diesel oxidation catalyst (DOC) downstream of the turbocharger converts unburned hydrocarbons (HC) and carbon monoxide (CO) into harmless CO₂ and H₂O. For applications requiring stricter compliance, optional upgrades include a diesel particulate filter (DPF) or selective catalytic reduction (SCR) system, though the base engine design prioritizes minimal aftertreatment for simplicity and cost-effectiveness.

Cooling & Lubrication

The closed-loop liquid cooling system features a centrifugal water pump capable of circulating 180 liters/min (47.5 gallons/min) of coolant, maintaining optimal operating temperatures between 82–95°C (180–203°F). A pressurized radiator with a thermostatically controlled viscous fan ensures efficient heat dissipation even in high ambient temperatures (up to 50°C/122°F). The lubrication system employs a gerotor-type oil pump delivering 60 liters/min (15.8 gallons/min) at rated speed, with full-flow spin-on filtration (30-micron absolute rating) to protect critical components like the turbocharger bearings and piston rings.

Control System & Electronics

An optional electronic control module (ECM) enables precise management of fuel injection timing, turbocharger wastegate position, and idle speed, improving drivability and diagnostic capabilities. The ECM communicates via J1939 CAN bus, allowing integration with vehicle systems for real-time performance monitoring. Mechanical versions feature a mechanical governor with hydraulic compensation for stable speed control under fluctuating loads, making them ideal for non-road applications without complex electronic requirements.

Performance Specifications

Parameter
Value
Displacement
5.9 L (360 in³)
Bore × Stroke
102 mm × 118 mm (4.02 in × 4.65 in)
Rated Power (ISO 1585)
110–168 kW (148–225 HP) at 2,500 RPM
Max Torque
610–700 N·m (450–516 lb-ft) at 1,400 RPM
Dry Weight
680 kg (1,500 lbs)
Fuel Type
Diesel (ASTM D975, EN 590 compliant)
Starting System
12V/24V electric starter (2.2 kW rating)

Application & Durability

Designed for a B10 life of 500,000 km (310,000 miles) in on-highway use, the B5.9 excels in demanding environments, including delivery trucks, school buses, excavators, and generator sets. Its modular design allows easy access to service points—such as the spin-on fuel/water separator, accessible oil filter, and tilt-up valve cover—reducing maintenance downtime by 20% compared to competitive models. The OEM NEW assembly ensures factory-fresh components, including precision-mated piston rings, bearings, and seals, guaranteeing zero-leak performance and compliance with Cummins’ rigorous quality standards (ISO/TS 16949:2009).

In summary, the B5.9 Engine Assembly balances proven mechanical reliability with modern combustion technology, making it a versatile choice for applications requiring a balance of power, efficiency, and ease of maintenance. Its robust design and OEM-grade craftsmanship ensure seamless integration and consistent performance across diverse operating conditions.

SWAFLY MACHINERY CO., LIMITED
China's Leading Supplier of Construction, Mining & Agricultural Machinery Parts

Company Overview
Founded in 2009, SWAFLY Machinery has specialized in manufacturing and supplying high-quality excavator parts, mining machinery parts, and agricultural tractor parts for over 15 years. Leveraging deep industry expertise and technological innovation, we have become a trusted one-stop solution provider for global customers seeking reliable, cost-effective machinery components.

Core Business & Product Portfolio

Full-Range Machinery Engines & Parts

Covered Brands: KUBOTA, Yanmar, Perkins, Caterpillar, Cummins, Komatsu, Isuzu, Mitsubishi, Volvo Penta, Benz, Deutz

Offerings: OEM-compliant engines and a comprehensive range of after-market parts, all rigorously tested to ensure performance, durability, and compatibility with original equipment.

Specialized Agricultural Machinery Solutions

Focus on KUBOTA & Bobcat agricultural tractors and harvesters:
• Engine assemblies and full-series components;
• Customized parts solutions tailored to diverse farming applications, enhancing operational efficiency.

Heavy-Duty Mining Machinery Components

Specialization in 100-800 ton class mining equipment for brands like HITACHI, CATERPILLAR, and KOMATSU:
• Key hydraulic system components: main hydraulic pumps, travel motors, final drives, reduction gearboxes, MCV main valves;
• Rapid development of cost-effective OEM alternatives and high-quality after-market products, supported by a full suite of after-sales services for global clients.

Our Commitment
Dedicated to excellence in quality, innovation, and customer service, we strive to deliver superior machinery parts that drive productivity and sustainability across construction, mining, and agriculture industries worldwide.

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Product Detail

OEM NEW B5.9 Engine Assembly

PRODUCT DESCRIPTION
Model: B5.9		Category: Diesel Engine
Brand: SWAFLY		Place of Origin: America
Condition: Original & Oem		Warranty: 6 months
MOQ: 1 pc		Production Capacity: 1000pcs /Month
Standard or Nonstandard: Standard		Payment Term: L/C,T/T, Western Union, Tradeassurance
Delivery Time: 1-3 days (depend on order)		Means of Transport: By Sea, Air or DHL/FEDEX/TNT/EMS
Guarantee: We will check the engine and send detail pictures to buyer to confirm before shipping.

OEM NEW B5.9 Engine Assembly Technical Overview

The OEM NEW B5.9 Engine Assembly is a robust, inline-six cylinder diesel powerplant engineered for medium-duty commercial vehicles, industrial equipment, and power generation applications. With a displacement of 5.9 liters (360 cubic inches), this turbocharged, aftercooled engine combines advanced combustion technology, durable construction, and precise control systems to deliver optimal power, fuel efficiency, and reliability.

Core Design & Construction

The engine features a high-strength cast iron cylinder block with integrated steel main bearing caps, providing exceptional rigidity to withstand peak firing pressures up to 1,800 bar (26,100 PSI). The cylinder head, constructed from high-grade aluminum alloy, incorporates four valves per cylinder (two intake, two exhaust) for improved air charge efficiency. A forged steel crankshaft with induction-hardened journals and powder-metal connecting rods ensure long-term durability under heavy loads, while a lightweight aluminum oil pan reduces overall engine weight without compromising structural integrity.

Combustion & Fuel System

The B5.9 utilizes a direct-injection (DI) system with a mechanical rotary fuel pump (or optional electronic unit injector, EUI, for later models), delivering fuel at pressures up to 1,000 bar (14,500 PSI) for fine atomization and efficient combustion. The pre-combustion chamber design promotes uniform flame propagation, reducing noise and emissions while optimizing torque output—peaking at 610 N·m (450 lb-ft) at 1,400 RPM in standard configurations. A compression ratio of 17.3:1 balances cold-start performance with thermal efficiency, achieving a brake specific fuel consumption (BSFC) as low as 205 g/kWh under rated load.

Air Management & Turbocharging

**

A Holset® turbocharger with a wastegate actuator provides forced induction, boosting intake air pressure to 1.6 bar (23.2 PSI) and increasing volumetric efficiency by 30% compared to naturally aspirated designs. An air-to-air aftercooler reduces intake temperature by up to 50°C (122°F), densifying the air charge for more complete combustion and reduced NOx formation. The engine’s variable geometry intake manifold further optimizes airflow across the RPM range, ensuring responsive power delivery from idle (600 RPM) to rated speed (2,500 RPM).

Emissions & Compliance

Meeting EPA Tier 3 (2005) and EU Stage IIIA emissions standards, the B5.9 incorporates an exhaust gas recirculation (EGR) system with a cooled loop to reduce nitrogen oxide (NOx) by recirculating 15–20% of exhaust gases back into the combustion chamber. A diesel oxidation catalyst (DOC) downstream of the turbocharger converts unburned hydrocarbons (HC) and carbon monoxide (CO) into harmless CO₂ and H₂O. For applications requiring stricter compliance, optional upgrades include a diesel particulate filter (DPF) or selective catalytic reduction (SCR) system, though the base engine design prioritizes minimal aftertreatment for simplicity and cost-effectiveness.

Cooling & Lubrication

The closed-loop liquid cooling system features a centrifugal water pump capable of circulating 180 liters/min (47.5 gallons/min) of coolant, maintaining optimal operating temperatures between 82–95°C (180–203°F). A pressurized radiator with a thermostatically controlled viscous fan ensures efficient heat dissipation even in high ambient temperatures (up to 50°C/122°F). The lubrication system employs a gerotor-type oil pump delivering 60 liters/min (15.8 gallons/min) at rated speed, with full-flow spin-on filtration (30-micron absolute rating) to protect critical components like the turbocharger bearings and piston rings.

Control System & Electronics

An optional electronic control module (ECM) enables precise management of fuel injection timing, turbocharger wastegate position, and idle speed, improving drivability and diagnostic capabilities. The ECM communicates via J1939 CAN bus, allowing integration with vehicle systems for real-time performance monitoring. Mechanical versions feature a mechanical governor with hydraulic compensation for stable speed control under fluctuating loads, making them ideal for non-road applications without complex electronic requirements.

Performance Specifications

Parameter
Value
Displacement
5.9 L (360 in³)
Bore × Stroke
102 mm × 118 mm (4.02 in × 4.65 in)
Rated Power (ISO 1585)
110–168 kW (148–225 HP) at 2,500 RPM
Max Torque
610–700 N·m (450–516 lb-ft) at 1,400 RPM
Dry Weight
680 kg (1,500 lbs)
Fuel Type
Diesel (ASTM D975, EN 590 compliant)
Starting System
12V/24V electric starter (2.2 kW rating)

Application & Durability

Designed for a B10 life of 500,000 km (310,000 miles) in on-highway use, the B5.9 excels in demanding environments, including delivery trucks, school buses, excavators, and generator sets. Its modular design allows easy access to service points—such as the spin-on fuel/water separator, accessible oil filter, and tilt-up valve cover—reducing maintenance downtime by 20% compared to competitive models. The OEM NEW assembly ensures factory-fresh components, including precision-mated piston rings, bearings, and seals, guaranteeing zero-leak performance and compliance with Cummins’ rigorous quality standards (ISO/TS 16949:2009).

In summary, the B5.9 Engine Assembly balances proven mechanical reliability with modern combustion technology, making it a versatile choice for applications requiring a balance of power, efficiency, and ease of maintenance. Its robust design and OEM-grade craftsmanship ensure seamless integration and consistent performance across diverse operating conditions.

cummins-engine

SWAFLY Poster

SWAFLY MACHINERY CO., LIMITED
China's Leading Supplier of Construction, Mining & Agricultural Machinery Parts

Core Business & Product Portfolio

Full-Range Machinery Engines & Parts

Covered Brands: KUBOTA, Yanmar, Perkins, Caterpillar, Cummins, Komatsu, Isuzu, Mitsubishi, Volvo Penta, Benz, Deutz

Offerings: OEM-compliant engines and a comprehensive range of after-market parts, all rigorously tested to ensure performance, durability, and compatibility with original equipment.

Specialized Agricultural Machinery Solutions

Heavy-Duty Mining Machinery Components

2023年SWAFLY 国外展会

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