The Wacker Neuson Radiator Cap is a genuine OEM component designed for the G40, G50, G60, and G70 series portable generators. As a direct OEM replacement, this cap is manufactured to the exact pressure specification required by Wacker Neuson's generator cooling systems — ensuring a proper seal and consistent coolant system performance. It fits multiple generator configurations across the G-series lineup, including mobile and standard variants. Verify your model number before ordering to confirm compatibility with your specific unit.
Key Features
- Correct Pressure Rating for G-Series Cooling Systems — Engineered to the exact pressure spec of the original cap, maintaining proper coolant pressurization and preventing premature boilover.
- Genuine OEM Part — Sourced directly from Wacker Neuson, this is the same cap installed at the factory — no guesswork on fitment or spec.
- Broad G-Series Compatibility — Fits G40, G50, G60, and G70 generators across standard, mobile, and regional (Brazil/LATAM) configurations.
- Drop-In Replacement — Threads directly onto the factory radiator filler neck with the same seating profile as the original, requiring no hardware modifications.
- Protects the Entire Cooling Circuit — A correctly rated cap maintains system pressure and keeps the overflow/return valve functioning as designed, protecting the radiator, hoses, and water pump from pressure-related stress.
- Fuel System Safety Compliance — Operating a generator with a missing or incorrect radiator cap risks coolant loss, overheating, and potential engine shutdown on a live jobsite — use the correct OEM cap to keep the cooling system sealed and safe.
The radiator cap seals the cooling system and maintains the operating pressure needed to raise the coolant's boiling point, allowing the engine to run at its designed temperature range without overheating. It also houses a pressure-relief valve that controls coolant flow to and from the overflow reservoir — if this valve sticks or the cap loses its seal, the system can lose coolant, run hot, or allow air into the circuit. On a portable generator like the G40, G50, G60, or G70, where consistent power output depends on a stable engine temperature, a failed or incorrect radiator cap can quickly lead to thermal shutdown or engine damage.
Part Details
| Part Number | 5200021265 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Radiator Cap |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Mobile Generator | G60 | 5200015951, 5200016641, 5100029185 |
| G70 | G70 | 5200015952, 5100022041, 5100022040 |
| Generator | G40 | 5200015906, 5200016640, 5100029184, 5200015907 |
| Generator | G50 | 5200015909, 5100022009, 5100022008 |
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.
