The Wacker Neuson Phase Switch Knob is a genuine OEM control component designed for the G25 portable generator series. As a direct OEM replacement sourced through Wacker Neuson's parts program, this knob is manufactured to the same specification as the original installed at the factory. It fits across a wide range of G25 configurations including skid-mounted, custom, cold weather, extended run tank, and Tier 4 Final and Tier 4i variants. Keeping the correct knob fitted ensures the phase switch operates with the positive engagement and tactile response your crew depends on during generator setup and load management.
Key Features
- Genuine OEM Construction: — Molded and finished to the original profile, ensuring the knob seats and locks on the phase switch shaft without slop or misalignment.
- Drop-In Replacement: — Matches the original mounting interface on the G25 phase switch; installs without modification to the switch assembly or panel.
- Broad G25 Fitment: — Compatible with skid-mounted, custom, cold weather, extended run tank, Standard T4, T4i, and T4F G25 generator configurations.
- Positive Phase Selection: — A properly fitted knob delivers clear, defined rotation between phase positions, preventing ambiguous switch positioning and potential output errors under load.
- Electrical Safety Relevance: — Correct operation of the phase switch is critical to proper power output configuration; a cracked, slipping, or missing knob can result in unintended phase selection and equipment damage.
The phase switch on a portable generator allows the operator to select between single-phase and three-phase power output, matching the generator's output to the connected load. The Phase Switch Knob is the mechanical interface between the operator and that switch — it must grip the shaft firmly and rotate cleanly through its detent positions for the selection to be reliable. When the knob cracks, strips, or goes missing, accurate phase selection becomes difficult or impossible, risking mismatched power delivery to tools and equipment on site.
Part Details
| Part Number | 5000155477 |
|---|---|
| Old Part Number | 0155477 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Phase Switch Knob |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Mobile Generator, Custom | G25 | 5000620346, 5000620344, 5000620345, 5000620642, 5000009466, 5000620004, 5000620640, 5000620709, 5000620641, 5000009368, 5200005557, 5200003991, 5000620931, 5200001316, 5000009258, 5000621005, 5100041592, 5000620706, 5100022834, 5000009462, 5000009476, 5100042507, 5100042510, 5100042512, 5100042509, 5100042508 |
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.
