Wacker Neuson 5000165143 Overflow Bottle

The Wacker Neuson Overflow Bottle is a genuine OEM component designed for a broad range of Wacker Neuson ride-on trowels, light towers, portable generators, and trash pumps. This is a direct OEM replacement sourced from Wacker Neuson, ensuring exact dimensional and material conformance for every compatible machine. Confirmed fitment spans CRT48 and CRT60 ride-on concrete trowels, LTN6 and LTW light tower series, GP series generators including the G50, G70, G100, G120, G130, G150, G180, G230, and G320 models, select RD27 tandem rollers, and PT6 trash pumps. If your machine is running low on coolant or showing signs of cooling system pressure loss, the is the correct OEM part to restore the system to spec.

Key Features

• Genuine OEM Coolant Containment: — Molded to Wacker Neuson's exact wall thickness and neck dimensions, ensuring the cap seats and seals correctly under operating pressure — critical for maintaining a closed cooling circuit.
• Broad Cross-Family Fitment: — A single part number covering CRT48 and CRT60 ride-on trowels, LTN6 and LTW light towers, G-series portable generators from G40 through G320, RD27 tandem rollers, and PT6 trash pumps.
• Drop-In Replacement: — Mounts to the existing hose fittings and bracket points with no re-routing or adapter hardware required; the OEM port sizing matches the original coolant return line exactly.
• Cooling System Integrity: — A cracked or degraded overflow bottle allows coolant loss and introduces air into the cooling circuit, leading to elevated operating temperatures and potential engine damage. Replacing with a sound OEM bottle restores proper pressure cycling and coolant recovery.
• Fuel and Fluid Safety Compliance: — As part of the engine cooling circuit, an intact overflow bottle prevents coolant from contacting hot engine surfaces or electrical components, reducing fire and electrical fault risk on generator and light tower applications.

The overflow bottle — sometimes called a coolant recovery tank or expansion reservoir — captures excess coolant that is pushed out of the radiator as the engine heats up, then draws it back in as the engine cools down. This continuous recovery cycle keeps the cooling system full, prevents air pockets from forming, and reduces the need for manual top-ups between service intervals. When the bottle cracks, becomes brittle, or loses its seal at the cap or hose fittings, coolant is lost to the environment instead of being recovered, which can cause the engine to run hot and eventually overheat if left unaddressed.

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.