Wacker Neuson 5200020645 Hi400 Retro Fit Kit

The Wacker Neuson Hi400 Retro Fit Kit is a genuine OEM retrofit assembly designed for the HI 400HD G and HI 400HD D Indirect Air Heaters. As a direct Wacker Neuson OEM part, the is manufactured to the exact specifications of the original component, ensuring a correct, hassle-free installation on your heater unit. This kit covers both the gas and diesel variants of the HI 400HD series, making it the verified choice for technicians servicing either configuration.

Key Features

• OEM-Matched Retrofit Components — Each part in this kit is produced to Wacker Neuson's original design tolerances, ensuring the retrofit upgrade performs exactly as intended on the HI 400HD platform.
• Drop-In Kit Configuration — All necessary components are bundled together, so technicians can complete the retrofit without sourcing individual parts separately.
• Dual-Variant Fitment — Confirmed fit for both the HI 400HD G (Gas, 5000620701) and HI 400HD D (Diesel, 5000620868) Indirect Air Heaters.
• Restores Full Heating Output — A properly completed retrofit keeps combustion and heat-exchange systems operating at rated capacity, preventing uneven or insufficient heat delivery on the jobsite.
• Fuel System Integrity — Retrofitting with genuine OEM components maintains the heater's combustion integrity, an important consideration when operating indirect air heaters in enclosed or occupied spaces.

A retrofit kit for an indirect air heater bundles the updated or corrected components needed to bring an existing unit in line with a revised design standard or to replace a group of wear-related parts in a single service event. On indirect air heaters like the HI 400HD series, these kits typically address the burner assembly, fuel delivery, or heat-exchanger interface — components that work together to produce and transfer clean, combustion-free warm air to the target space. When any part of that system degrades or falls outside specification, heating output drops, fuel consumption rises, and in worst cases the unit may fault and shut down, leaving workers and equipment in the cold.

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.