The Wacker Neuson Idler Gear is a genuine OEM component designed for the G40, G60, G70, G95, and G110 series portable generators. Sourced directly from Wacker Neuson, this idler gear meets the original engineering specifications for smooth, consistent gear train operation across the full GP generator lineup. It is a direct-fit replacement for a wide range of G-series mobile generator configurations, including 50Hz LATAM and Brazil-market Premium and Value variants. If your generator is showing signs of gear noise, erratic output, or drivetrain roughness, part number is the correct OEM solution to restore proper function.
Key Features
- Genuine OEM Gear Geometry — Machined to the original tooth profile and pitch specifications, ensuring smooth mesh with mating gears in the G-series drivetrain without chatter or premature wear.
- Direct-Fit Replacement — Engineered to drop into the existing gear train position, matching the original bore, hub, and tooth count for a straightforward swap during service.
- Broad G-Series Compatibility — Confirmed fitment across G40, G60, G70, G95, and G110 generator models, covering both North American and international configurations including 50Hz LATAM and Brazil-market units.
- Protects Drivetrain Integrity — A correctly functioning idler gear maintains steady torque transfer between engine and alternator; a worn gear introduces backlash that can accelerate damage to adjacent components.
- Genuine Wacker Neuson Part — Supplied under OEM part number 5200021158, giving you full confidence in traceability and compatibility when servicing your generator fleet.
The idler gear sits within the generator's gear train, acting as an intermediary between the engine's drive gear and the alternator or accessory drive. Its role is to transmit rotational force smoothly and at the correct ratio, keeping the alternator spinning at the speed needed to produce stable electrical output. When the idler gear wears — through normal use, lack of lubrication, or contamination — the result is increased gear lash, vibration, and noise, and in advanced cases, inconsistent voltage output or complete drivetrain failure. Replacing a worn idler gear with the correct OEM component restores proper gear mesh and protects the surrounding drivetrain from secondary damage.
Part Details
| Part Number | 5200021158 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Idler Gear |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Mobile Generator | G95 | 5200016642, 5200020677, 5100029186 |
| Mobile Generator | G60 | 5200015951, 5200016641, 5100029185 |
| G70 | G70 | 5200015952, 5100022041, 5100022040 |
| Generator | G40 | 5200015906, 5200016640, 5100029184, 5200015907 |
| Generator | G50 | 5200015909 |
| G110 Generator, Brazil, Value | G110 | 5100022042, 5100022043 |
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.
Wacker Neuson