The Genie 75166GT is a genuine OEM Cummins B3.9 Valve Cover Washer designed for Genie S-100, S-105, S-120, and S-125 telescopic boom lifts. As a direct OEM part, this washer is built to the same specification as the component originally installed at the factory, ensuring a correct, leak-free seal against the valve cover. Cross-reference part number 75166GT against your machine's parts manual to confirm fitment before ordering.
Key Features
- Genuine OEM Sealing Performance — Manufactured to the exact material and compression tolerances required by the Cummins B3.9 engine, delivering consistent sealing integrity at the valve cover joint.
- Direct Drop-In Replacement — Engineered to seat exactly as the original, with no reworking of the valve cover or fastener hardware needed during installation.
- Broad Telescopic Boom Coverage — Fits Genie S-100, S-105, S-120, and S-125 telescopic boom lifts equipped with the Cummins B3.9 engine.
- Prevents Oil Leakage at the Valve Cover — A properly functioning valve cover washer maintains a tight seal under engine heat and vibration, keeping oil where it belongs and protecting surrounding engine components.
- Operational Safety on High-Reach Equipment — Oil leaks on large telescopic booms can create fire risk and engine damage at elevation; replacing a worn washer promptly supports safe, uninterrupted operation at height.
A valve cover washer acts as the sealing element between the valve cover fastener and the valve cover itself on the Cummins B3.9 engine. It compresses under torque to form a barrier that prevents engine oil from weeping around the cover bolt. When this washer deteriorates, hardens, or deforms, oil can begin to seep past the fastener, leading to external leaks, oil contamination of engine surfaces, and potential engine damage over time. Replacing the washer at the first sign of seepage is a straightforward service step that protects the engine and keeps the machine running cleanly.
Part Details
| Part Number | 75166GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Cummins B3.9 Valve Cover Washer |
Compatibility & Fitment
| Name | Model |
|---|---|
| S-120 | S-120 |
| S-125 | S-125 |
| S-100 | S-100 |
| S-105 | S-105 |
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.
