Wacker Neuson 5200021835 Air Compressor

The Wacker Neuson 5200021835 is a genuine OEM Air Compressor designed for the APT4S and APT4T series self-priming pumps, covering both standard and cold weather configurations. As a direct OEM replacement, this part is manufactured to the same specifications as the original component installed at the factory, ensuring a correct fit across the full APT4S and APT4T pump lineup. Compatible models include the APT4S Pump with Skid, APT4T Pump with Electric Brake, and APT4T Pump with Surge Brake — including all corresponding cold weather variants. Verifying your model number against part number 5200021835 before ordering is the fastest way to confirm compatibility for your specific unit.

Key Features

• Genuine OEM Construction — Manufactured to Wacker Neuson's original engineering specifications, delivering the same output capacity and pressure range as the part your pump shipped with.
• Drop-In Replacement Fit — Mounts to the same brackets and connects to the same pneumatic lines as the original, with no rework to surrounding components.
• Broad APT Series Compatibility — Fits APT4S and APT4T pumps across both standard and cold weather configurations, covering electric brake and surge brake variants.
• Maintains Priming System Performance — A functioning air compressor is essential for the pump's self-priming operation; a worn or failed unit results in loss of prime and inability to move fluid.
• Cold Weather Ready — Confirmed fitment across cold weather model variants, making this the correct replacement choice for units operating in low-temperature environments.

On Wacker Neuson APT series self-priming pumps, the air compressor plays a direct role in the priming cycle. It generates the compressed air needed to evacuate the suction line and draw fluid up into the pump housing before full pumping operation begins. Without a properly functioning air compressor, the pump cannot build the vacuum required to prime itself, which means it will fail to move water or slurry regardless of engine or motor condition. When the compressor wears out or fails, the symptom is typically a pump that runs but will not pick up fluid — replacing part number 5200021835 restores the self-priming function and gets the unit back to full operation.

Part Details

Compatibility & Fitment

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.