The Wacker Neuson Diesel Pre-Heated Filter 1/4FF - 200 is a genuine OEM component designed for the HI 400HD D Indirect Air Heater. As a direct OEM part, it is manufactured to the exact specifications required for proper fuel system performance in this heater series. Sourcing part number directly ensures you receive the correct filter grade, thread sizing, and pre-heat configuration for a drop-in installation. Keep your indirect air heater running cleanly and efficiently with the right part from the start.
Key Features
- OEM Filtration Integrity — Genuine Wacker Neuson construction ensures the correct micron rating and pre-heating element specification for reliable diesel fuel conditioning in cold-start and low-temperature operating conditions.
- Correct 1/4FF Port Sizing — Matched to the 1/4FF female-to-female fitting configuration of the HI 400HD D fuel circuit, allowing a straightforward connection without adapters or modifications to existing fuel lines.
- Verified Fitment for HI 400HD D — Confirmed for the HI 400HD D Indirect Air Heater (model HI400HDD), so you can order with confidence that this filter is the right unit for your machine.
- Protects Fuel Delivery Under Load — A functioning pre-heated diesel filter prevents wax crystal formation and particulate ingestion at the burner nozzle, maintaining consistent fuel flow and combustion quality throughout the heat cycle.
- Fuel System Safety Compliance — Using the correct OEM-specified filter in a diesel-fired indirect heater is a critical safety step; an undersized or incompatible filter risks fuel starvation, incomplete combustion, or uncontrolled flameout in enclosed work environments.
A diesel pre-heated filter serves two roles in an indirect air heater's fuel system: it removes particulates that could clog the burner nozzle, and it gently warms incoming diesel fuel to prevent wax or gel formation during cold-weather operation. Without a properly functioning pre-heated filter, fuel flow to the combustion chamber becomes inconsistent, leading to hard starts, misfires, or heater shutdown. Replacing a worn or blocked filter at the correct service interval keeps combustion stable and protects the downstream nozzle and pump from premature wear.
Part Details
| Part Number | 5200021279 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Diesel Pre-Heated Filter 1/4FF - 200 |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 400HD D Indirect Air Heater | HI400HDD | 5000620868 |
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.
Wacker Neuson
Wacker Neuson 5200021219 Diesel Pre-Heated Filter 1/4FF 200
Wacker Neuson