The Wacker Neuson Rocker Arm Shaft Spring is a genuine OEM component designed for the HIF690 indirect fired heater. Sourced directly from Wacker Neuson, this is the same part installed at the factory, so you can count on a correct, hassle-free installation. If your heater is showing signs of irregular combustion airflow or a loose rocker arm assembly, replacing this spring with the genuine restores proper mechanical action and gets your equipment back on schedule.
Key Features
- Genuine OEM Spring Tension: — Manufactured to exact tension and dimensional specs, ensuring the rocker arm engages and releases with the correct load — no guesswork on spring rate.
- Drop-In Replacement for the HIF690: — Engineered to seat directly onto the rocker arm shaft assembly of the HIF690, matching the original mounting points without rework.
- HIF690 Heater Fitment Confirmed: — Verified fitment for the Wacker Neuson HIF690 indirect fired heater series, so you can order with confidence.
- Restores Proper Rocker Arm Action: — A worn or broken spring allows the rocker arm to lose consistent return travel, disrupting valve or airflow timing; this replacement brings mechanical movement back to spec.
- Backed by Wacker Neuson OEM Standards: — As a genuine part, 5100029451 meets the same material and heat-treatment requirements as the original, giving you lasting durability in demanding heating applications.
The rocker arm shaft spring is a small but critical component in the valve or air-control mechanism of indirect fired heaters. It maintains consistent return tension on the rocker arm, ensuring the arm snaps back to its neutral position after each actuation cycle. When this spring weakens, cracks, or breaks, the rocker arm can stick, float, or mistime its movement — leading to inconsistent combustion, reduced heat output, or failure to ignite reliably. Replacing a fatigued spring promptly keeps the heater cycling correctly and prevents secondary wear on the surrounding shaft and arm components.
Part Details
| Part Number | 5100029451 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Rocker Arm Shaft Spring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HIF690 | HIF690 | 5100047562 |
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.
