The Wacker Neuson is a genuine OEM Cotter Pin 4 X 28 designed for the GV and GP series portable generators, including the GV3800A, GV5600A, GV6600A, GP3800A, GP5600A, GP6600A, and GPS9700A. As a direct OEM replacement, part is sourced from Wacker Neuson and manufactured to the same specifications as the original hardware installed at the factory. This pin is a small but critical fastening component that keeps key assemblies properly secured during operation. Confirm your model number before ordering to ensure compatibility across this broad generator family.
Key Features
- Genuine OEM Material Grade — Manufactured to the same dimensional and material specification as the original, ensuring correct shear resistance and retention force for this pin diameter and length.
- Drop-In Hardware Fit — Sized at 4 x 28 mm to seat directly into the original bore and cotter slot without modification — the pin spreads and locks exactly as designed.
- Broad Generator Family Coverage — Compatible with GV3800A, GV5600A, GV6600A, GP3800A, GP5600A, GP6600A, and GPS9700A models across multiple build series.
- Prevents Unintended Component Displacement — A properly installed cotter pin holds shafts, clevis pins, and linkage pins in position; a missing or broken one allows those components to walk out or separate under vibration.
- Critical Retention Safety Role — On generator assemblies, retaining pins secure linkage and control components tied to throttle and load management — a failed pin can compromise governed operation and operator safety.
A cotter pin is a split-pin fastener inserted through a drilled hole in a shaft or bolt and then bent open on the far side to lock the assembly in place. On portable generators like the GV and GP series, cotter pins are used to secure clevis connections, control linkages, and pivot points against vibration-induced loosening. When a cotter pin shears or goes missing, the component it was retaining can shift or detach entirely, leading to loss of control linkage function or unexpected mechanical movement during operation.
Part Details
| Part Number | 5000171858 |
|---|---|
| Old Part Number | 0171858 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Cotter Pin 4 X 28 |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Value Generator | GV3800A | 5000620409, 5000620287, 5000620334 |
| Value Generator | GV5600A | 5000620410, 5000620288, 5000620335 |
| Value Portable Generator | GV3800 | 5000620994 |
| Value Portable Generator | GV5600 | 5000620995 |
| Value Portable Generators | GV6600 | 5000620996 |
| Value Generator, 60Hz | GV6600A | 5000620289, 5000620336 |
| GP3800A | GP3800A | 5100041978 |
| GP5600A | GP5600A | 5100041979 |
| GP6600A | GP6600A | 5100042220 |
| GPS9700A | GPS9700A | 5100042221 |
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.
