Cummins ISMe420-30 420HP Heavy-Duty Diesel Engine

The Cummins ISMe420-30 is a 10.8L inline 6-cylinder electronically controlled diesel engine rated at 306 kW / 420 HP at 1,900 RPM. With peak torque reaching 2,010 N·m at 1,200 RPM, it is designed for heavy trucks, mining transport vehicles, concrete mixer trucks, buses, truck-mounted cranes and other applications requiring strong low-speed pulling power.

The ISMe420-30 is produced through the Xi’an Cummins Engine Company platform and is commonly selected for complete engine replacement, fleet maintenance, vehicle repower projects and heavy-duty equipment supply. The final engine condition, CPL, electronic control configuration and supplied accessories should be confirmed in the quotation and order documents.

For replacement orders, ZEB Power checks the existing engine nameplate, ESN, CPL, vehicle model, transmission interface, wiring harness and required accessories before quotation. This helps reduce the risk of ordering an engine with the correct power rating but an incompatible electronic or installation configuration.

• 10.8L inline 6-cylinder heavy-duty diesel engine
• 306 kW / 420 HP rated output at 1,900 RPM
• 2,010 N·m peak torque at 1,200 RPM
• Turbocharged and charge-air-cooled configuration
• Full electronic engine control
• Euro III / China Stage III configuration
• 24V electric starting system
• CPL reference 48534 · Datasheet reference FR20318

Need to confirm whether the ISMe420-30 matches your truck or equipment? Send us the engine nameplate, ESN, CPL and vehicle model for configuration checking.

Confirm the Correct ISMe420-30 Before Ordering

The ISM11 and ISMe engine families include several power ratings, emission versions and electronic calibrations. Engines with the same 10.8L displacement may still use different ECM settings, wiring harnesses, flywheel housings, PTO arrangements and application-specific accessories.

Matching by engine power alone is not recommended. The final replacement decision should be based on the original ESN, CPL, installation layout and electronic control configuration.

Cummins ISMe420-30 Technical Specifications

General Engine Data

Power and Torque Data

Fuel, Air and Electronic Systems

Dimensions and Weight

Dimensions, weight, fuel-system specification and supplied accessories may vary by CPL, production batch and application configuration. The final technical specification should be confirmed in the quotation and pre-shipment documents.

What Equipment Uses the ISMe420-30?

The ISMe420-30 is designed for heavy-duty applications where high vehicle weight, steep gradients, frequent load changes or continuous operation require strong torque below the rated engine speed.

Final application suitability depends on the original vehicle configuration, cooling capacity, transmission, axle ratio, electronic controls, PTO arrangement and local emission requirements.

Why the Low-Speed Torque Curve Matters

The ISMe420-30 reaches its peak torque of 2,010 N·m at 1,200 RPM. This allows a heavily loaded vehicle to develop pulling force before reaching rated speed, helping with loaded starts, gradients and acceleration without relying on continuous high engine RPM.

As engine speed increases toward 1,900 RPM, torque decreases while total power reaches the rated 420 HP output. This torque profile is suited to heavy transport applications that require both low-speed pulling power and stable high-load cruising performance.

ISMe420-30 Bore and Stroke Verification

Some third-party listings show different bore and stroke figures for the ISMe420-30. Based on the product information supplied for this configuration, the listed specification is 125 mm × 147 mm with 10.8L displacement and datasheet reference FR20318.

Because incorrect base-engine data can lead to wrong parts, overhaul kits or replacement decisions, the bore, stroke, CPL and ESN should be verified against the final engine nameplate and technical document before purchase.

ISM11 420HP Variant Comparison

The ISMe420-30 belongs to the broader 10.8L ISM11 platform. Several models provide similar rated power but use different emission systems, ECM calibrations and supporting components.

Similar rated power does not mean the engines are directly interchangeable. Aftertreatment equipment, wiring harnesses, sensors, ECM calibration and installation requirements may differ between emission versions.

Need to compare another power rating or emission tier? View the Cummins ISM11 engine series guide.

Replacement and Repower Compatibility

The ISMe420-30 may be considered for replacement or repower projects involving compatible ISM11 or earlier M11-based vehicle platforms. However, it should not be described as a universal direct replacement.

For a repower project, send photos of the existing engine compartment, original engine nameplate, transmission interface and wiring connections before quotation.

Parts and Service Support

ZEB Power can supply Cummins ISM11 and ISMe engine parts together with a complete engine or separately for maintenance, repair and overhaul projects.

Commonly requested ISMe420-30 parts include:

• Fuel injectors and electronic fuel-system components
• ECM, sensors and wiring harness components
• Turbocharger assembly
• Cylinder head assembly
• Piston, liner and ring kits
• Main and connecting rod bearings
• Gasket and seal kits
• Water pump and cooling-system components
• In-frame and complete overhaul kits
• Oil, fuel and air filters

Parts should be identified by ESN, CPL and part number. Components from another ISM11 emission version or calibration are not automatically interchangeable.

Packaging, Shipping and Trade Terms

The engine can be inspected before shipment for model, serial number, external condition and confirmed accessories. Export packing and shipping arrangements are prepared according to the final order configuration and destination.

Warranty and After-Sales Support

The ISMe420-30 can be supplied with warranty according to the confirmed order terms. Warranty normally applies to manufacturing defects under correct installation, proper maintenance and operation within the rated parameters.

• Warranty period: 12 months or 1,500 operating hours, whichever comes first
• Claim information: ESN, CPL, operating hours, fault description, photos, videos and fault codes
• Technical support: configuration checking, installation guidance, diagnostics and parts identification
• Warranty exclusions: incorrect installation, contaminated fuel, overheating, overload, unauthorized modification and poor maintenance

Frequently Asked Questions

What does “-30” mean in ISMe420-30?

The suffix identifies the Euro III / China Stage III application and emission configuration within the ISM11 family. The final ECM, CPL and supporting components should still be confirmed by ESN.

Can the ISMe420-30 replace an older M11 engine?

It may be considered for selected repower projects, but it is not automatically a direct replacement. Electronic controls, wiring harnesses, throttle input, mounting, cooling, transmission interface and PTO requirements must be reviewed.

What is special about the ISMe420-30 torque curve?

The engine reaches 2,010 N·m at only 1,200 RPM. This gives heavily loaded trucks strong pulling power at lower engine speed, supporting hill starts, acceleration and reduced gear changing.

What is CPL 48534 used for?

The CPL reference identifies the component and calibration group associated with a specific engine build. It should be used together with the ESN when checking replacement compatibility or ordering parts.

What is the difference between ISMe420-30 and ISMe380-30?

Both belong to the Euro III ISM11 family, but they use different rated outputs and ECM calibrations. Supporting components and application approvals may also differ, so the 420 HP version should not replace the 380 HP version without configuration review.

Is REPTO available for concrete mixer trucks?

REPTO and other PTO configurations may be available depending on the engine build and application. State the required hydraulic pump or auxiliary drive arrangement during inquiry.

Can ISMe420-30 parts be ordered separately?

Yes. Engine parts including injectors, turbocharger, ECM components, overhaul kits, cylinder head parts, filters and cooling components can be quoted separately after ESN and CPL confirmation.

What information is needed for a quotation?

Provide the original engine nameplate, ESN, CPL, vehicle or equipment model, required quantity, destination and any required PTO or accessory configuration.

Contact and Inquiry

To receive an accurate quotation for the Cummins ISMe420-30, send the engine and vehicle information before ordering.

For faster configuration checking, please provide:

• Original engine nameplate photo
• Engine serial number and CPL
• Truck, bus or equipment brand and model
• Transmission or driven-equipment information
• Required PTO or REPTO configuration
• Required quantity
• Destination country and port
• Preferred trade terms
• Required delivery date

Response is normally available within 24 business hours after the required information is received. Contact us for ISMe420-30 pricing, stock and replacement verification.