The Wacker Neuson Flat Washer is a genuine OEM component designed for the HI750 and HI900 series indirect-fired air heaters. Sourced directly from Wacker Neuson, this flat washer matches the original part in material grade, dimensions, and load-bearing profile — ensuring it seats and functions exactly as intended. Compatible across multiple HI750 and HI900 configurations, including diesel, gas, surge brake, and mobile variants. Always verify your model number before ordering to confirm fitment.
Key Features
- Genuine OEM Material Match — Manufactured to the same material grade and thickness specification as the original, ensuring correct load distribution at fastener points within the heater assembly.
- Drop-In Replacement — Matches the original hole diameter and outer profile, so it installs directly without reworking surrounding hardware or fasteners.
- Broad HI-Series Fitment — Confirmed for HI750GM, HI750G, HI750GM HD, HI900DGM, and related indirect-fired heater configurations including surge brake and mobile variants.
- Protects Fastener Joints — A correctly sized flat washer distributes clamping force evenly across the mating surface, preventing fastener pull-through, surface damage, and joint loosening under vibration or thermal cycling.
- Fuel and Heat System Integrity — Used in heater assemblies where proper fastener retention is essential to keeping panels, fuel system brackets, and burner components securely in place during operation.
A flat washer serves as a load-spreading interface between a fastener — bolt, screw, or nut — and the surface it clamps against. In an indirect-fired air heater like the HI750 or HI900, components are subject to significant vibration and repeated thermal expansion and contraction, both of which can cause fasteners to loosen or damage the surrounding material over time. Using the correctly sized washer maintains consistent clamping force, protects the mating surface from wear, and helps keep critical assemblies — including burner housings, fuel system brackets, and access panels — firmly secured through extended service cycles.
Part Details
| Part Number | 5000186721 |
|---|---|
| Old Part Number | 0186721 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flat Washer |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI750 DGM HEATER-INDIRECT | HI750GM | 5000620859, 5000620930 |
| HI 750GM HD-Mobile Indirect Ai r Heater-Surge, -40 | HI750GMHD | 5000620969 |
| HI750G HEATER-INDIRECT | HI750G | 5000620857 |
| Factory-Installed Options | Factory-Installed Options | 5200004152 |
| HI900 Heater-DGM,Srg,-40 | HI900DGM | 5200014221, 5200014222, 5200014165, 5200014166 |
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.
