The Wacker Neuson Stud is a genuine OEM component designed for the APT4S and APT4T series water pumps, including standard, cold weather, surge brake, and electric brake configurations. Sourced directly from Wacker Neuson, this stud meets the original design intent and dimensional requirements of the factory part. It fits across the full APT4S and APT4T model range, covering both skid-mounted and brake-equipped variants, so you can order with confidence knowing it matches your machine. Keeping the correct stud in place is essential to maintaining proper assembly integrity throughout the pump system.
Key Features
- Genuine OEM Dimensional Accuracy — Manufactured to the exact thread pitch, diameter, and length specified for the APT4S and APT4T pump assemblies, ensuring proper clamping load and joint integrity.
- Drop-In Installation — Matches the original mounting configuration directly, threading into existing bores without reworking mating components or hardware.
- Broad APT Series Fitment — Compatible with APT4S Pump with Skid, APT4T Pump with Surge Brake, APT4T Pump with Electric Brake, and all corresponding Cold Weather variants.
- Structural Reliability Under Load — A correctly installed stud maintains consistent clamping force across pump components; a worn, stripped, or missing stud can lead to loosened assemblies, vibration, and fluid path compromise.
- Authorized Wacker Neuson Part — Carries the full backing of Wacker Neuson's OEM supply chain, so the part number, specification, and application data are verified against current factory records.
A stud is a headless threaded fastener that threads permanently into a housing or structural component on one end, with the exposed thread on the opposite end accepting a nut to secure mating parts. In pump assemblies like the APT4S and APT4T, studs are used where bolt access is limited or where repeated assembly and disassembly is expected, since the stud remains fixed in the base component and guides mating parts into alignment during reassembly. When a stud becomes stripped, corroded, or broken, it compromises the clamping load of the joint, which can result in leaks, misalignment, or mechanical failure of surrounding components.
Part Details
| Part Number | 5200020078 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Stud |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT4S Pump w/Skid | APT4S | 5200018977 |
| APT4T Pump, Surge Brake | APT4T | 5200019643, 5200019644 |
| APT4T Pump, Surge Brake, Cold Weather | APT4T CW | 5200019792, 5200019793 |
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
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.
