Wacker Neuson 5200020035 Washer — Genuine OEM Replacement for APT4S & APT4T Pumps

The Wacker Neuson Washer is a genuine OEM component designed for the APT4S and APT4T pump series, including standard and cold weather configurations. As a factory-sourced part, the meets the exact dimensional and material standards set by Wacker Neuson for these pump models. It is a direct-fit replacement that installs without modification, restoring your pump to proper working condition. Confirmed fitment spans the APT4S Pump with Skid, APT4T Pump with Surge Brake, APT4T Pump with Electric Brake, and their respective cold weather variants.

Key Features

• OEM Dimensional Accuracy — Manufactured to Wacker Neuson's exact thickness and bore tolerances, ensuring proper seating, load distribution, and secure fastener clamping on these pump assemblies.
• Drop-In Replacement — Matches the original mounting position and hardware interface on the APT4S and APT4T pump platforms, so installation is straightforward with no rework needed.
• Broad APT Series Fitment — Compatible with six APT4S and APT4T configurations, including surge brake, electric brake, and cold weather variants, making this a versatile stock item for pump service work.
• Maintains Clamping Integrity — A correctly spec'd washer distributes fastener load evenly across mating surfaces; a worn, undersized, or incorrect washer can allow fasteners to loosen under vibration, leading to leaks or component damage.
• Genuine Wacker Neuson Part — Sourced directly from Wacker Neuson, this part carries the same material grade and finish as the washer originally installed at the factory, supporting consistent long-term performance in demanding pump applications.

A washer serves as a load-spreading interface between a fastener — such as a bolt or nut — and the surface it clamps against. By distributing the clamping force over a wider area, it prevents fastener heads from pulling through or embedding into softer materials and helps maintain consistent tension across the joint. On pump assemblies like the APT4S and APT4T, where vibration and fluid pressure create ongoing mechanical stress, a washer in poor condition can allow joints to work loose over time, potentially causing leaks, misalignment, or accelerated wear on surrounding components. Replacing a damaged or missing washer with the correct OEM part restores the integrity of the fastened joint and protects the components around it.

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.