Alternator for Peterbilt 330 335 340 357 359 378 379 By Engine 19011187

Product Overview

This is a professional-grade, high-output 140A Alternator designed for heavy-duty commercial service. It is a direct replacement for the Delco 34SI series, engineered to provide reliable power for the demanding electrical systems of Peterbilt's classic and modern vocational trucks.

Key Part Numbers: Direct replacement for 19011187, 19011258, and 321-758.

Broad Vehicle Fitment: Precisely engineered for Peterbilt models 330, 335, 340, 357, 359, 378, and 379 across various engine configurations.

Electrical Specs: Delivers a stable 12V output with a powerful 140 Amp charging current to support multiple onboard accessories and lighting.

Key Performance Features

High-Purity Copper Motor: Built with 100% copper windings to ensure maximum conductivity, superior heat resistance, and long-term durability in extreme work environments.

Optimized Cooling: Features an External Fan (EF) design and internal regulator to maintain stable operating temperatures, even during high-load periods.

Efficiency & Quiet Operation: Engineered for low energy consumption and fuel efficiency. The advanced mechanical design provides "Mute-level" low noise performance to reduce driver fatigue and cabin vibration.

OE Numbers

Alternator Specifications

Alternator Detailed Applications

Wholesale & Manufacturing Advantages

IATF 16949 Certified: Manufactured in facilities meeting ISO 9001 and ISO 14001 standards, ensuring every unit meets rigorous global automotive Tier-1 quality benchmarks.

Scalable Supply: With an annual capacity of 3 million sets, we provide a reliable supply chain for large-scale distributors and fleet suppliers.

Customization Options: We support OEM/ODM requests, including private-label branding, customized packaging, and specific material enhancements.

Warranty: Backed by a 12-month warranty with flexible lead times (7-60 days) to accommodate your logistics and inventory cycles.

Technical Specifications Summary

Voltage: 12V

Amperage: 140A

Regulator: Internal

Fan: External

Weight: 27 lbs (Heavy-duty construction)

Minimum Order (MOQ): 100 Units

The Rareelectrical Peterbilt Alternator is a robust choice for fleet maintenance, offering the high amperage needed for modern electronics while maintaining the fitment of legacy Peterbilt models.

Alternator Supplier | High-Output, OE-Standard Production for Bulk Buyers

Elecdura Alternator Certification: CE, ISO Compliance, Plus Local Market Support

Elecdura alternators are manufactured in full compliance with leading international standards, enabling seamless market entry worldwide. We hold key certifications, including CE for product safety in the European market, ISO 14001 for environmental management, and ISO 45001 for occupational health and safety. These demonstrate our commitment to reliable performance, sustainable production, and high workplace standards.If your target market requires specific local approvals, our dedicated team will proactively coordinate the certification process to obtain all necessary documentation, ensuring your supply chain remains efficient and fully compliant. We are here to support your regulatory needs.

ISO14001

ISO45001

CE

Elecdura Alternators are made in automated factories with certified precision

The factory is equipped with advanced machinery to ensure consistent quality and high production efficiency throughout the alternator manufacturing process. Its modern facilities enable both large-scale production and adherence to stringent quality control standards.

Bulk Quantity of Alternator Rotors High-volume production of core rotating components, ready for final assembly.

Finished Alternators in Bulk Order Quantities Complete alternator units prepared for large-volume export and timely delivery.

OEMODM Alternator Showcase for Branding Explore customized solutions and branding opportunities for your market.

Industrial Alternator Assembly Line Witness precision manufacturing and efficient production capacity for reliable alternator supply.

Alternator Sample Display for Quality Inspection Evaluate product finish, craftsmanship, and key specifications firsthand.

Stator Assemblies Produced at Scale Consistent quality in bulk stator production, ensuring stable alternator performance.

Peterbilt Alternator Quality: 30-Stage Testing & 100% Pre-Shipment Inspection

Development Experiment

Incoming Inspection

Field Inspection

Outgoing Inspection

Establish strict inspection system and process for each process from development, experiment and shipment of finished product.

The development, production and test of each starter must pass 30 kinds of test.

Before shipment, 100% check of the appearance, size and nut to prevent any defects from leaking out

Peterbilt Alternator Supplier Strong Export Capability and Stable Supply

Elecdura ensures large-scale, stable supply of alternators to global markets. Each pallet and carton is meticulously packaged to export standards for secure transport. Leveraging years of export expertise and consistent demand from long-term clients, we provide reliable delivery assurance and supply chain continuity for bulk orders.

Peterbilt Alternator Supplier Partnership Market Success

Elecdura collaborates with leading distributors and brands worldwide — helping our partners dominate their local aftermarket. Through professional sourcing, customized product development, and close market research, we've supported clients in becoming the Top 1 aftermarket suppliers in South America(in some categories). Our integrated marketing and supply capabilities make us more than a factory — we're your strategic growth partner.

Successful client collaboration showcased at trade fair booth

Distributor partnership meeting for aftermarket product planning

Elecdura with international buyer in Brazil Exhibition

Elecdura assisting South American client in aftermarket development

Elecdura team and partners at international auto parts exhibition

Warehouse of Elecdura global partner displaying stocked

FAQ-Alternator for Peterbilt 330 335 340 357 359 378 379 By Engine

Q1: Which specific Peterbilt truck and engine models is this alternator with part number 19011187 compatible with? Is it truly compatible with all the truck series you listed (330, 335, 340, 357, 359, 378, 379)?

A: Part number 19011187 is a core identification number based on the engine side. Its compatibility is not directly determined by the truck series, but by the specific engine model installed in the truck. It is commonly used with Cummins N14, M11, ISM series and Caterpillar 3406, C15 engines, which were widely fitted in classic Peterbilt models (like 359, 379, etc.). The truck series you mentioned (330 through 379) are compatible if they are equipped with the aforementioned engines. The critical verification step is: You must cross-reference the exact model and original part number from your engine's nameplate, or provide the Engine Serial Number (ESN) for final confirmation.

Q2: Is this a brand new OEM part, a remanufactured unit, or an aftermarket brand part? Given the demanding operating conditions of heavy-duty commercial trucks, what about its durability and testing standards?

A: In the heavy-duty truck market, high-quality remanufactured units are the mainstream and cost-effective choice. There are also new aftermarket brand parts (e.g., corresponding models from Lester, Prestolite, Bosch) that meet or exceed OE specifications. Brand new OEM parts are often prohibitively expensive. A reliable unit will utilize heavy-duty bearings, reinforced rectifier assemblies, and undergo rigorous full-load thermal cycle testing and voltage output stability testing to ensure dependable operation under continuous high load and high-vibration conditions. Buyers should inquire if the manufacturer adheres to relevant SAE (Society of Automotive Engineers) standards.

Q3: Does the product ship as a complete installation kit? For example, does it include necessary mounting brackets, adjusting arms, pulleys, serpentine belts, and connection plugs?

A: In the vast majority of cases, this refers to the alternator core only. The installation system for heavy-duty truck alternators is highly customized. Mounting brackets, adjusting arms (adjusting links), pulleys, fans, and belts almost always need to be reused from your original engine setup or ordered separately based on your specific configuration. The electrical connector may be integrated or require transferring the old connector. Before ordering, it is essential to confirm the condition and availability of these accessories based on photos or diagrams of your actual engine.

Q4: Is any special adjustment, calibration, or software setting required after installation? Is the alternator's output voltage adjustable to match battery bank requirements?

A: For these classic model engines (e.g., N14, 3406), the alternators are typically non-intelligent, self-exciting types, so no electronic programming or software adaptation is required after installation. However, a critical step is the mandatory use of a precise voltmeter to measure and adjust the output voltage with the engine running. Many of these alternators feature an external voltage regulator or an adjustment screw, allowing technicians to set the no-load output voltage accurately within a specified range (e.g., 28.2V - 28.8V for a 24V system) to optimize battery charging and protect onboard electronics.

Q5: Does the warranty policy account for the operational intensity of commercial vehicles? Is it a simple time-based warranty, or does it incorporate operating hours or mileage? How are cross-border or cross-regional claims handled?

A: Warranty policies for commercial vehicle components should be more robust than for passenger cars. Reputable suppliers offer "12 months unlimited mileage" or warranties combining "X months / Y thousand miles / thousand hours". Coverage includes defects in materials and workmanship but explicitly excludes damage from improper installation, misuse (e.g., incorrect belt tension), or operation beyond rated capacity. For international procurement, buyers must confirm the supplier's global/regional warranty network, the claims process (whether the defective unit must be returned to a designated location), and the availability of exchange or advance replacement services, which are critical for maximizing fleet uptime.