Wacker Neuson 5000162892 Secondary Alternator 3800-4000W Can

The Wacker Neuson Secondary Alternator 3800-4000W Can is a genuine OEM component designed for the GP4000 series portable generators, covering both the Premium Portable Generator and the standard Portable Generator configurations. Sourced directly from Wacker Neuson, this part meets the exact design and output specifications of the original unit installed at the factory. If your GP4000 is failing to deliver its rated power output or showing signs of alternator wear, part number is the correct OEM replacement to restore full generator performance.

Key Features

• OEM-Matched Output Rating — Engineered to the 3800–4000W output specification of the original alternator, ensuring the GP4000 delivers its full rated wattage under load.
• Direct Drop-In Replacement — Designed to mount and connect exactly as the factory-installed unit, with no adaptation to wiring, brackets, or housing required.
• GP4000 Series Fitment — Confirmed compatible with both the GP4000 Premium Portable Generator and the GP4000 Portable Generator variants.
• Sustained Power Delivery — A correctly functioning secondary alternator maintains stable voltage output across connected tools and equipment; a worn unit causes voltage drop, flickering, or complete power loss at the outlets.
• Electrical Safety Compliance — As a core electrical generation component, using the correct OEM alternator helps ensure the generator operates within its designed voltage and frequency tolerances, protecting both the machine and connected equipment.

The secondary alternator is the core power-generating component inside a portable generator — it converts mechanical energy from the engine into usable AC electrical output. In a GP4000 unit, this alternator is responsible for sustaining the rated wattage delivered to connected tools, equipment, or job-site power systems. When the alternator windings degrade or the unit fails outright, the generator may produce reduced output, unstable voltage, or no power at all, making prompt replacement critical to keeping your generator operational.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.