The Wacker Neuson Rocker Arm Support is a genuine OEM component designed for the APT4S and APT4T pump series, including standard and cold weather variants. Sourced directly from Wacker Neuson, this part meets the exact specifications of the original, ensuring a correct fit without adaptation. It is compatible across the full APT4S and APT4T lineup, covering skid-mounted, surge brake, and electric brake configurations in both standard and cold weather builds. When you need a dependable, like-for-like replacement, part is the correct choice.
Key Features
- Genuine OEM Structural Integrity — Manufactured to Wacker Neuson's original tolerances, ensuring the rocker arm support maintains correct geometry and load-bearing performance under pump operating conditions.
- Direct-Fit Replacement — Engineered to install in the same mounting position as the original, with matching attachment points for straightforward swap-out on APT4S and APT4T pumps.
- Broad APT Series Compatibility — Fits the full range of APT4S and APT4T pump configurations, including skid-mounted, surge brake, electric brake, and cold weather variants.
- Supports Consistent Valve Train Operation — A properly functioning rocker arm support keeps valve timing stable; a worn or damaged support can cause irregular valve movement, leading to poor pump performance and accelerated wear.
- Verified Part Number — Cross-reference part number 5200019887 against your machine's serial tag or parts manual to confirm fitment before ordering.
The rocker arm support is a structural component in the engine's valve train, providing the fixed mounting point that allows the rocker arms to pivot correctly and actuate the intake and exhaust valves in sequence. It keeps the rocker arms properly aligned with the valve stems and pushrods, which is essential for maintaining accurate valve timing and efficient combustion. When the rocker arm support becomes cracked, worn, or loose, valve movement becomes inconsistent — resulting in lost power, rough running, increased fuel consumption, or potential engine damage if left unaddressed.
Part Details
| Part Number | 5200019887 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Rocker Arm Support |
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.
