Wacker Neuson 5000155138 External Retaining Ring 9mm

The Wacker Neuson is a genuine OEM External Retaining Ring 9mm designed for the CT36 and CT48 series walk-behind concrete power trowels. As a direct OEM replacement, part is manufactured to the same specifications as the original component installed at the factory, ensuring a correct, trouble-free installation. This ring fits a wide range of CT36 and CT48 models including the CT36-5A, CT36-6, CT36-8A, CT36-9, CT36-400E, CT36-X, CT48-8A, CT48-9, CT48-11A, and CT48-13A-V. Sourcing the correct OEM part by part number is the most reliable way to confirm compatibility across this broad model range.

Key Features

• Genuine OEM Retention Integrity — Manufactured to original material grade and dimensional tolerances, ensuring the ring seats and retains components with the same holding force as the original.
• 9mm External Groove Fit — Sized specifically for 9mm external shaft grooves; installs directly into the existing groove without modification to the shaft or surrounding components.
• Broad CT-Series Compatibility — Fits CT36 and CT48 walk-behind concrete power trowel models across multiple engine and configuration variants, including A, V, EU, C, E, and X designations.
• Prevents Component Migration — A correctly fitted retaining ring locks rotating or sliding components axially in place; a worn, distorted, or missing ring can allow critical parts to shift, causing accelerated wear or mechanical failure.
• Verified by OEM Part Number — Ordering by Wacker Neuson part number 5000155138 eliminates guesswork and confirms you receive the correct ring for your specific CT36 or CT48 model.

An external retaining ring — sometimes called a snap ring or circlip — is a fastening device that seats into a machined groove on the outside of a shaft or pin to prevent axially mounted components from sliding off or shifting out of position. In a walk-behind concrete trowel, these rings are used throughout the drivetrain and blade pitch assemblies to secure bearings, collars, and other rotating components in precise alignment. When a retaining ring becomes deformed, cracked, or dislodged, the part it retains can migrate out of position, leading to uneven trowel blade contact, increased vibration, and potential damage to adjacent components — making prompt replacement essential to keeping the machine operating correctly.

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.