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Cummins N/K/M Series Alternators

The NT855 is a time-tested classic engine , and its alternator specifications vary depending on end applications (generator sets, bulldozers, heavy-duty trucks, etc.) and original production years.

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Alternators for NT855 Engines

The NT855 is a time-tested classic engine , and its alternator specifications vary depending on end applications (generator sets, bulldozers, heavy-duty trucks, etc.) and original production years.

nt855k19m11k38qsk15充电机3400698 Alternator---

Common Model & Part Numbers

Part No. 4060811 is a widely adopted alternator rated at 24V/35A, a brushless alternator primarily fitted on Chongqing CUMMINS NT855-G7 and other generator set models.

A full range of alternative amperage output variants are also available to accommodate diverse electrical load requirements.

Product Features

Wide Compatibility & Extensive Application

As one of CUMMINS’ most classic engine models, its alternator aftermarket supply chain is well-developed, offering a full range of options including GENUINE & OEM parts and reputable aftermarket brands such as Delco Remy and Prestolite.

Heavy-Duty & Long Service Life

Engineered to withstand harsh working conditions including mines and construction sites, it delivers outstanding vibration resistance and dust-proof performance.

Alternators for K19 / K38 / K50 Engines

The K-series is CUMMINS’ lineup of large-displacement engines. Widely used in heavy construction machinery and generator sets, these engines demand ultra-high power output and operational reliability from alternators.

KTA19 alternator 3016627 with competitive diesel g

KTA19 alternator 3016627 with competitive diesel g (2)

Common Model & Part Numbers

Part No. 3400698 serves as the flagship alternator for this series, a high-output brushless alternator rated at 24V/100A.

Additional relevant part numbers include 3072483 and 4078701, with minor specification discrepancies corresponding to different production batches and equipment configurations.

Product Features

High Current Output

With an output current up to 100A, it can supply sufficient power to the battery banks of large equipment and guarantee stable engine cranking and consistent operation of all electrical systems.

Brushless Design

This is its core competitive advantage. Compared with conventional brushed alternators, the brushless structure eliminates carbon brush wear, greatly extending service life while cutting maintenance frequency and costs. It is especially ideal for generator sets and heavy-duty machinery that require prolonged continuous operation.

Alternators for M11 / QSM11 Engines

The M11 and its electronically controlled variant QSM11 are mainstream power units for medium-to-heavy trucks and construction machinery, with alternators engineered to prioritize high reliability and cross-environment adaptability.

Common Model & Part Numbers

High-output alternators such as Part No. 3400698 are also compatible with M11/QSM11 engines. The exact part number shall be precisely matched according to the Engine Serial Number (ESN), as engines with different factory configurations are fitted with alternators of varying specifications.

Product Features

Superior Environmental Adaptability

It boasts excellent waterproof, dust-proof and high-temperature resistant performance, suitable for long-distance transportation and various complicated working conditions.

High Charging Efficiency

It can output stable charging current even at low engine idle speed to avoid battery undercharging.

Sourcing & Cross-Reference Guidelines

Multiple alternator variants may be factory-fitted to a single engine model; follow the below protocols for accurate procurement:

Cross-check OEM Part Number Locate the Cummins part number stamped on the original failed alternator (e.g. 3400698, 4060811) — this is the most direct matching reference.

Submit Engine Serial Number (ESN) If the original part number is illegible or unidentifiable, provide the full ESN printed on the engine nameplate; suppliers can retrieve the factory-specified matching alternator part number via official Cummins systems.

Verify Core Technical Parameters Confirm critical specifications including rated voltage (24V as standard), output amperage (35A, 100A, etc.), pulley groove quantity and terminal connector type.

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