The Wacker Neuson Exhaust Valve is a genuine OEM exhaust valve designed for the APT4S and APT4T pump series, including standard, cold weather, surge brake, and electric brake configurations. As a direct OEM replacement, this part is sourced from Wacker Neuson and built to the same specifications as the original component installed at the factory. It fits across the full APT4T and APT4S lineup, covering both skid-mounted and cold weather variants. When you need an exact match for your pump, part number is the confirmed correct component for these models.
Key Features
- Genuine OEM Valve Integrity — Manufactured by Wacker Neuson to the original seating geometry and material tolerances required for proper exhaust flow control in these pumps.
- Drop-In Replacement — Matches the original valve seat interface and dimensions, allowing straightforward installation without modification to the cylinder head assembly.
- Broad APT Series Coverage — Confirmed fitment across APT4S and APT4T pump variants, including surge brake, electric brake, skid, and cold weather configurations.
- Sustained Engine Performance — A correctly seating exhaust valve maintains compression and exhaust scavenging efficiency; a worn or damaged valve leads to power loss, rough running, and potential engine damage over time.
- Emissions and Combustion Compliance — Proper exhaust valve function is essential to maintaining correct combustion chamber pressure and exhaust timing, directly affecting engine emissions output and operational compliance.
The exhaust valve is a critical component in the engine's four-stroke cycle, opening at the correct moment to allow spent combustion gases to exit the cylinder before the next intake stroke begins. It works in combination with the valve seat and rocker arm assembly to maintain a gas-tight seal during compression and combustion, which is essential for generating consistent power output. When an exhaust valve wears, warps, or fails to seat properly, compression drops, the engine loses power, and unburned gases can cause overheating or accelerated internal wear.
Part Details
| Part Number | 5200019898 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Exhaust Valve |
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.
