The Wacker Neuson Idle Adjustment Screw is a genuine OEM component designed for the PD3B 75mm/3-inch diaphragm pump. As a direct OEM replacement, this screw is manufactured to the same specification as the original part, ensuring the carburetor's idle circuit performs exactly as intended. Wacker Neuson OEM parts are produced to precise tolerances, so you can trust that part number installs and functions without guesswork. If your PD3B is hunting at idle, stalling, or refusing to settle into a stable low-speed running condition, this is the screw to replace.
Key Features
- OEM-Specified Needle Taper and Thread Pitch — Manufactured to the exact taper angle and thread specification required for proper fuel-mixture metering in the PD3B carburetor's idle circuit.
- Direct Drop-In Installation — Threads directly into the existing idle mixture port with no recutting or reseating of the carburetor body required.
- Confirmed Fitment for the PD3B Diaphragm Pump — Verified for the PD3B 75mm/3-inch diaphragm pump platform; check your model and serial number before ordering.
- Restores Stable Idle Performance — A worn or damaged idle adjustment screw allows unmetered air into the fuel circuit, causing rough idling, stalling, and inconsistent pump operation; replacing it restores smooth low-speed running.
- Fuel System Integrity — Correct seating of this screw is critical to maintaining a sealed idle circuit; an improperly fitted or damaged screw can introduce air leaks that affect the full operating range of the engine.
The idle adjustment screw regulates the air-fuel mixture delivered to the engine at low throttle settings, controlling how smoothly and consistently the engine idles. It threads into the carburetor body and is adjusted to fine-tune the mixture for stable, low-speed operation. When the screw becomes worn, damaged, or loses its sealing ability, the idle circuit is disrupted — leading to rough running, stalling on startup, or an engine that won't hold a steady idle regardless of throttle input.
Part Details
| Part Number | 5000084780 |
|---|---|
| Old Part Number | 0084780 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Idle Adjustment Screw |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 75mm/3in Diaphragm Pump | PD3B | 5000006802 |
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.
