The Wacker Neuson Flat Washer is a genuine OEM component designed for use across the PT6LT and PT6LS 6-inch centrifugal trash pump series as well as GPS9700, GPS8500, GS8.5V, GS9.7V, and GS12Ai portable generator models. As a genuine OEM part, is manufactured to the exact material and dimensional specifications set by Wacker Neuson, ensuring a direct drop-in fit with no guesswork. This washer supports proper load distribution and fastener retention across a range of hardware connections throughout these machines. With broad compatibility covering pump and generator configurations in standard, trailer-mounted, skid-mounted, EPA T4, and international variants, this is the correct replacement when the original washer shows wear, corrosion, or deformation.
Key Features
- Genuine OEM Material Spec — Manufactured to Wacker Neuson's original dimensional and material tolerances, ensuring correct hardness and surface finish for consistent load distribution under fastener torque.
- Direct Hardware Interface Fit — Sized to match the original bolt or stud diameter exactly, seating flush without shimming or adjustment during reinstallation.
- Wide Model Coverage — Confirmed fitment across PT6LT, PT6LS, PT6Y, PTK6 trash pump variants and GPS9700, GPS8500, GS8.5V, GS9.7V, and GS12Ai generator configurations, including EPA T4 and international builds.
- Fastener Integrity — A correctly spec'd washer prevents fastener pull-through, distributes clamp load evenly, and protects mating surfaces from damage — worn or undersized washers can lead to loose assemblies and accelerated wear on surrounding components.
- Verified OEM Part Number — Sourced directly under Wacker Neuson part number 5000077873, eliminating the risk of ordering an incorrect size or grade substitute.
A flat washer serves as a load-distributing interface between a fastener — such as a bolt head or nut — and the surface it clamps against. By spreading the clamping force over a wider area, it prevents the fastener from pulling into or damaging softer materials and helps maintain consistent torque retention over time. When a washer becomes corroded, deformed, or worn thin, clamping force becomes uneven, fasteners can work loose under vibration, and the mating surfaces risk damage that complicates future service.
Part Details
| Part Number | 5000077873 |
|---|---|
| Old Part Number | 0077873 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flat Washer |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PT6LT Pump w/Trailer | PT6LT | 5000007175, 5200014740 |
| 150mm/6in Centrifugal Trash Pu mp Skid Mounted | PT6LS | 5000007174, 5200014741 |
| Portable Generator with Electr ic Start | GPS9700 | 5000008287, 5000620264, 5200005042, 5000620973, 5100036768 |
| Portable Generator with Electr ic Start | GPS8500 | 5000008286 |
| Portable Generator with Electr ic Start | GS8.5V | 5000007661 |
| Portable Generator with Electr ic Start | GS9.7V | 5000007662 |
| PT6Y | PT6Y-SA | 5100070835 |
| PT6YT | PT6YT | 5100070966 |
| PUMP PT6Y-AU | PT6Y-AU | 5100076956 |
| PT6YT | PT6YT-IN | 5100077923 |
| PT 6LS | PT6LS(I) | 5200017427, 5200012427 |
| 50Hz Portable Generator 12 kVA | GS12Ai | 5000009108 |
| Trash Pump | PT6LT(I) | 5100014076 |
| PT6Y | PT6Y | 5100064168, 5100069617 |
| Trash Pump | PTK6 | 5200007830 |
| PT6Y | PT6Y EPA T4 | 5100073464 |
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.
