The Genie 102577GT is a genuine OEM Thermostat with Gasket designed for Genie S-100, S-105, S-120, and S-125 telescopic boom lifts equipped with the Cummins B4.5 engine. As a direct OEM replacement, this component is manufactured to the same specification as the original part, ensuring correct temperature regulation and a leak-free seal from installation. Cross-reference part number 102577GT against your parts manual to confirm fitment before ordering. Choosing a genuine OEM part means no guesswork on compatibility — this thermostat and gasket assembly installs directly in place of the original, keeping your Cummins-powered boom running within its intended operating temperature range.
Key Features
- OEM-Matched Temperature Calibration — Engineered to the correct opening temperature for the Cummins B4.5 engine, ensuring the cooling system operates within the manufacturer's specified thermal window.
- Integrated Gasket Included — Comes paired with the thermostat gasket, providing a complete, ready-to-install assembly that seals the housing without requiring a separately sourced seal.
- Direct-Fit for Cummins B4.5-Powered S-Series Booms — Confirmed fitment for the S-100, S-105, S-120, and S-125 telescopic boom lifts; verify against your serial number and parts manual.
- Protects Engine from Thermal Stress — A correctly calibrated thermostat prevents both overheating and under-temperature operation, both of which accelerate engine wear and can lead to costly repairs.
- Genuine Genie OEM Part — Sourced directly from Genie's authorized parts supply chain, this component meets the same standards as the unit installed at the factory.
- Operational Safety on High-Reach Equipment — Engine overheating on a telescopic boom at full extension creates serious operational risk; maintaining proper coolant temperature is essential to safe, uninterrupted aerial work.
A thermostat regulates engine coolant temperature by controlling when coolant is allowed to flow through the radiator. When the engine is cold, the thermostat stays closed, allowing it to reach operating temperature quickly. Once the correct temperature is reached, the thermostat opens to route coolant through the radiator and prevent overheating. The gasket seals the thermostat housing to prevent coolant leaks at that joint. A failed thermostat can cause the engine to run too hot — leading to overheating shutdowns — or too cold, which reduces fuel efficiency and increases engine wear. On large telescopic boom lifts like the S-100 through S-125 series, reliable engine thermal management is critical to sustained operation at height.
Part Details
| Part Number | 102577GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Thermostat with Gasket, Cummins B4.5 |
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.
