The Wacker Neuson Cotter Pin is a genuine OEM cotter pin designed for the HI and HDR series indirect and direct fired heaters, including the HI 90, HI 90HD, HI 120, HI 120HD, HI 200D, HI 200HD D, HI 300D, HI 300HD D, HI 400HD G, HI 400HD D, HI 110D, HI 110HD D, HDR 45, and HDR 155. As a genuine Wacker Neuson part, the is manufactured to the same specification as the original component installed at the factory, ensuring a direct, hassle-free installation. This cotter pin is a small but critical fastening component — sourcing the correct OEM part keeps your heater assembly secure and operating as intended across the full range of compatible models.
Key Features
- Genuine OEM Retention Integrity — Manufactured by Wacker Neuson to the exact dimensional spec of the original, so the pin seats and locks correctly without adjustment.
- Direct Drop-In Replacement — Installs into the same pin bore as the original cotter pin, requiring no modification to existing hardware or surrounding components.
- Broad HI and HDR Series Coverage — Compatible with fourteen Wacker Neuson indirect and direct fired heater models, from the compact HI 90 through to the HI 400HD D and HDR 155.
- Secure Mechanical Retention — A properly fitted cotter pin prevents fastener back-out and component separation; a missing or failed pin can allow critical linkage or shaft hardware to work loose during operation.
- Safety-Critical Fastener — Cotter pins serve as a final mechanical lock on pins and bolts in assemblies where vibration is present. Using the correct OEM specification part ensures the locking function performs as designed in a heating environment.
A cotter pin is a split-leg metal fastener inserted through a drilled hole in a bolt, shaft, or clevis pin to prevent it from backing out under vibration or load. Once inserted and bent open, it physically locks the assembly together, acting as a last line of defense against unintended disassembly. In portable heater applications — where components are subject to thermal cycling and transport vibration — a worn, fatigued, or missing cotter pin can allow fasteners to loosen, which may lead to component misalignment or separation. Replacing a damaged or missing cotter pin with the correct OEM part restores that mechanical lock and keeps the heater assembly intact through repeated heating cycles and jobsite movement.
Part Details
| Part Number | 5200021221 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Cotter Pin |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 400HD G Indirect Air Heater | HI400HD G | 5000620701 |
| HI 300HD D Indirect Air Heater, Diesel | HI300HDD | 5000620867 |
| HI 400HD D Indirect Air Heater | HI400HDD | 5000620868 |
| HI 110HD D Indirect Air Heater, Diesel | HI110HD D | 5000620864 |
| HI 300D, HEATER-INDIRECT, DIESEL, -20° | HI300D | 5000620866 |
| HI 110D, HEATER-INDIRECT, DIESEL, -20° | HI110D | 5000620915 |
| HDR 155 Direct Fired Radiant Heater | HDR155 | 5200007530 |
| HI 200D Indirect Air Heater | HI200D | 5200011877 |
| HI 200HD D Indirect Air Heater, Diesel | HI200HDD | 5200011878 |
| HDR 45 | HDR45 | 5200013800 |
| HI 90 | HI90 | 5200019340 |
| HI 90HD | HI90HD | 5200019341 |
| HI 120 | HI120 | 5200019342 |
| HI 120HD | HI120HD | 5200019343 |
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.
