Wacker Neuson 1000293746 Set of Backup Rings

The Wacker Neuson Set of Backup Rings is a genuine OEM seal component designed for PT6Y and PT6YT series self-priming centrifugal trash pumps. Sourced directly from Wacker Neuson, this set ensures the correct material grade, dimensional tolerance, and compression characteristics needed to maintain a leak-free pump assembly. Fitment covers a wide range of PT6Y and PT6YT configurations, including EPA Tier 4-compliant variants. Keeping a correct-spec backup ring set in place is essential to preserving pump suction performance and preventing premature seal failure in demanding job-site conditions.

Key Features

• OEM-Grade Seal Material — Manufactured to Wacker Neuson's exact compound and hardness specifications, ensuring the rings deliver consistent compression and chemical resistance against the fluids handled by PT6 trash pumps.
• Drop-In Replacement — Dimensioned to match the original groove geometry in PT6Y and PT6YT pump assemblies, allowing the rings to seat correctly without reworking hardware or sealing surfaces.
• Broad PT6 Series Coverage — Compatible across PT6Y and PT6YT configurations, including EPA Tier 4 and international variants (IN, SA, AU), making this a single part number that covers multiple pump builds.
• Protects Primary Seal Performance — Backup rings prevent seal extrusion under pressure fluctuations; worn or missing rings allow the primary seal to deform, leading to fluid bypass, pressure loss, and accelerated wear.
• Fluid System Integrity — Correct backup ring fitment is critical in pump applications where seal failure can result in uncontrolled fluid leakage; using the OEM-specified set maintains the pump's rated pressure containment.

Backup rings work alongside the primary O-ring or lip seal in a pump's fluid end assembly to prevent the softer seal material from extruding into clearance gaps under operating pressure. In a high-flow, self-priming trash pump like the PT6Y and PT6YT, pressure cycling during priming and pumping phases places repeated stress on every sealing surface. When backup rings wear, crack, or take a permanent set, the primary seal loses its support and begins to extrude, causing the pump to lose prime, leak externally, or draw air into the fluid path. Replacing the full set at each service interval restores the sealing stack to as-built condition and extends the service life of the surrounding seal components.

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.

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