The Wacker Neuson Welch Plug is a genuine OEM component designed for the CRT48 ride-on trowel and CT48 walk-behind trowel series. As a direct factory replacement, this plug seats precisely into the engine block or housing bore, maintaining a pressure-tight seal across the cooling and oil passages it covers. Verified fitment spans multiple CRT48 and CT48 configurations, including standard, high-speed, and electronic-steering variants. When you need a part that installs correctly the first time, sourcing the genuine Wacker Neuson eliminates guesswork on a critical sealing component.
Key Features
- Genuine OEM Sealing Integrity — Manufactured to Wacker Neuson's original bore-diameter and material specifications, ensuring full compression contact against the housing bore without gaps or deformation.
- Direct-Press Installation — Sized to match the original bore exactly, so the plug seats flush using standard press tooling — no re-machining or shimming required.
- Broad CRT48 and CT48 Compatibility — Confirmed fit across CRT48-34V, CRT48-31V, CRT48-31V-H, CRT48-31V-E, CRT48-31V-ES, CRT48-31V-ES-E, and CT48-13A-V trowel variants.
- Prevents Internal Fluid Loss — A correctly seated Welch Plug blocks coolant or oil from bypassing internal passages; a failed or dislodged plug can lead to rapid fluid loss and engine damage.
- Leak-Free Operation on the Finishing Floor — Keeping fluid contained protects both the engine and the concrete surface being finished — fluid contamination on a slab is a costly rework problem.
A Welch Plug — sometimes called a freeze plug or expansion plug — is a pressed-steel disc that seals cast passages in an engine block or housing that were opened during the casting and machining process. It holds internal fluids in their correct circuits and prevents contamination of adjacent components. When a Welch Plug corrodes, cracks, or is knocked loose, it allows coolant or oil to escape the block, which can result in overheating or lubrication failure if not addressed promptly.
Part Details
| Part Number | 5000157780 |
|---|---|
| Old Part Number | 0157780 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Welch Plug |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 1220mm/48in Ride-on Trowel | CRT48-34V | 5000620805, 5000620075, 5200004935 |
| 1220mm/48in Ride-on Trowel | CRT48-31V | 5000620476 |
| CT48-13A-V Trowel | CT48-13A-V | 5000009452, 5000620836 |
| 1220mm/48in High Speed Ride-On Trowel | CRT48-31V-H | 5000009086 |
| Ride-on Trowel | CRT48-31V-E | 5000009481 |
| Ride-on Trowel | CRT48-31V-ES-E | 5000009482 |
| 1220mm/48in Ride-on Trowel, El ectronic Steering | CRT48-31V-ES | 5000009216 |
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.
