Wacker Neuson 5000084637 Reduction Gear

The Wacker Neuson Reduction Gear is a genuine OEM component designed for GPS5600A and GPS6600A portable generators, GS4.6A, GS4.6AE, GS5.5A, GS5.6A, GS5.7A, and GS5.7AE series portable generators, and WB16 series Power Buggies. As a direct Wacker Neuson OEM part, the is manufactured to the same specification as the original, ensuring a correct fit within the drivetrain assembly without the guesswork of sourcing a substitute. This part covers an exceptionally wide range of GPS, GS, and WB16 configurations — including CARB, CSA, EPA, and CAN GFI variants — making it a go-to stock item for dealers and service technicians who support multiple Wacker Neuson units.

Key Features

• Genuine OEM Gear Tolerancing — Manufactured to Wacker Neuson's original mesh and tooth-profile specifications, ensuring smooth, low-noise power transfer through the reduction stage.
• Direct Drop-In Installation — Matches the original shaft interface and housing bore dimensions, so the gear seats and locks into the drivetrain exactly as the factory unit did.
• Broad Model Coverage — Fits GPS5600A and GPS6600A portable generators, GS4.6A through GS5.7AE series 50Hz generators, and WB16AE, WB16ADE, WB16AEF, WB16AES, WB16ADEF, WB16ADES, WB16AEFS, and WB16ADEFS Power Buggies across multiple regulatory variants.
• Correct Reduction Ratio — Maintains the designed output shaft speed for the generator or buggy drivetrain; an incorrect or worn gear can cause unstable output speed, overloading, or premature drivetrain wear.
• Backed by Wacker Neuson's OEM Parts Program — Supplied with a genuine part number (5000084637) for straightforward warranty documentation and parts traceability.

A reduction gear is a core drivetrain component that transfers rotational power from a higher-speed input shaft to a lower-speed output shaft by using meshing gear teeth at a calculated ratio. In portable generators and power buggies, this gear allows the engine to run at its optimal RPM while delivering the correct shaft speed to the alternator or drive wheels. When the reduction gear wears, chips, or fails, the result is lost efficiency, audible gear noise, vibration, or a complete loss of output — making prompt replacement critical to keeping the machine operational and protecting surrounding drivetrain components from secondary damage.

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.

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