The Wacker Neuson Rocker Arm Support is a genuine OEM component designed for the APT4S and APT4T pump series, including standard, surge brake, electric brake, and cold weather configurations. As a direct OEM replacement, this part is sourced from Wacker Neuson and built to the same specifications as the original, ensuring a correct fit across all covered models. Confirmed fitment includes the APT4S Pump with Skid, APT4T Pump with Surge Brake, APT4T Pump with Electric Brake, and their cold weather variants.
Key Features
- OEM Geometry and Load Tolerancing — Manufactured to the same dimensional and load-bearing specifications as the original, ensuring the rocker arm pivots and transfers force correctly without play or binding.
- Drop-In Installation — Matches the original mounting points and hardware pattern on covered APT4S and APT4T models, slotting directly into the valve train assembly without modification.
- Broad APT Series Coverage — Fits six distinct APT4S and APT4T configurations, including standard, surge brake, electric brake, and cold weather pump variants.
- Valve Train Stability — A correctly functioning rocker arm support maintains precise valve timing and consistent engine performance; a worn or cracked support causes valve misalignment, loss of compression, and accelerated engine wear.
- Genuine Wacker Neuson Part — Supplied as genuine OEM under part number 5200019888, giving you full confidence in part authenticity and long-term durability in demanding pump applications.
The rocker arm support is a structural component within the engine's valve train, providing the fixed pivot point around which the rocker arm rotates to open and close the intake and exhaust valves. It bears the repetitive mechanical loads generated with every engine cycle, keeping the rocker arm correctly aligned with the valve stem and push rod. When the support cracks, wears, or loosens, valve timing is disrupted — leading to rough running, loss of power, and potential internal engine damage if left unaddressed.
Part Details
| Part Number | 5200019888 |
|---|---|
| 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.
