Wacker Neuson 5100012887 Reversing Alarm 12V-24V DC

The Wacker Neuson Reversing Alarm 12V-24V DC is a genuine OEM component designed for the RD18, RD24, RD28, RD40, and RD45 series Tandem Rollers. Sourced directly from Wacker Neuson, this part meets the original electrical specifications required for safe and compliant reverse-warning operation on your machine. It is a direct-fit replacement that installs into the existing wiring harness without modification, covering an extensive range of standard, canopy, and open-ROPS configurations across both domestic US and international model variants. Whether you are servicing an RD18-80, an RD45-140 DPF, or any of the electric-drive RD24e and RD28e models, part number is the correct OEM alarm for the job.

Key Features

• Correct Voltage Range for the Application — Rated 12V-24V DC, this alarm matches the electrical system output of the full RD tandem roller lineup without requiring any voltage adaptation.
• Genuine OEM Part — Manufactured to Wacker Neuson's original specifications, ensuring the alarm tone, trigger response, and connector interface match what came off the assembly line.
• Broad Tandem Roller Compatibility — Fits RD18, RD24, RD28, RD40, and RD45 series machines including standard, canopy (C), open-ROPS (O), DPF, and electric-drive (e) variants.
• Keeps Reverse-Warning Audible and Consistent — A functioning reversing alarm delivers a clear, consistent audible signal every time the drum changes direction; a failed unit creates silent reverse cycles that increase collision risk on active worksites.
• Worksite Safety Compliance — Reversing alarms are mandatory on compaction equipment under OSHA and many site-specific safety regulations; replacing a faulty unit with the correct OEM part helps keep your machine in compliance with operator safety requirements.

A reversing alarm is an audible warning device that activates automatically whenever the machine is put into reverse, alerting ground workers and bystanders that the roller is about to move backward. On tandem asphalt and soil compaction rollers like the Wacker Neuson RD series, where operator sightlines to the rear can be limited, this alarm is a critical last line of defense against struck-by incidents. When the alarm fails — whether due to a faulty sounder, wiring fault, or connector corrosion — the machine loses its reverse-warning capability entirely, creating a safety gap that must be addressed before the roller returns to service.

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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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.